Organic light emitting diode and organic light emitting device including thereof

Abstract

An organic light emitting diode (OLED) including at least one emitting material (EML) disposed between two electrodes and including a first compound including a fused ring having boron and oxygen and

Description

ORGANIC LIGHT EMITTING DIODE AND ORGANIC LIGHT EMITTING DEVICE INCLUDING THEREOF CROSS-REFERENCE TO RELATED APPLICATIONS [1] This application claims the benefit to Korean Patent Application No. 10-2021-0160442, BACKGROUND Technical Field 12] The present disclosure relates to an organic light emitting diode, and more specifically, to an Discussion of the Related Art [3] As display devices have become larger, there exists a need for a flat display device with Among the flat display devices, a display device using an organic light 4] The OLED can be formed as a thin film having a thickness less than 2000 A and can be [5] In the OLED, when electrical charges are injected into an emitting material layer between Fluorescent materials of the related art have shown low luminous efficiency because only SUMMARY Accordingly, embodiments of the present disclosure are directed to an OLED and an An aspect of the present disclosure is to provide an OLED that can improve luminous Additional features and aspects will be set forth in the description that follows, and in part To achieve these and other aspects of the inventive concepts, as embodied and broadly [Formula 1] R2 L x 2 { 0 I : Rt RE " wherein, in Formula 1, each of R' to R? is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted C1-Cao alkyl, unsubstituted or substituted C1-Czo alkyl amino, an unsubstituted or substituted Cs-C30 aromatic group or an unsubstituted or substituted C3-Cso hetero aromatic group, wherein two to four of R! to R? are a moiety having the following structure of Formula 2 [Formula 2] 11 i 18 R N R R'2 J \ R'7 —— R' Ri [is R® wherein, in Formula 2, each of R!' to R®™ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Cao alkyl silyl, unsubstituted or substituted Ci-C2o alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, or adjacent two of R!! to R'® form an unsubstituted or substituted hetero aromatic ring having the following structure of Formula 3, wherein at least adjacent two of R!! to R'® form an unsubstituted or substituted hetero aromatic ring having the following structure of Formula 3; and asterisk indicates a linking position, [Formula 3] pe Pas z RE 82 A wherein, in Formula 3, XisNR*, QorS; each of R* to R¥ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Cao alkyl silyl, unsubstituted or substituted Ci-C2o alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group; and a dotted line indicates a fused portion, [Formula 7] R32 {R¥), BO ow 1 ae Q, RM AG (RY), (R%), (R® wherein, in Formula 7, each of R* to R* is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C;-Czo alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, optionally, two adjacent elements of R*! to R* form an unsubstituted or substituted fused ring having boron and nitrogen; each of R*® to R* is independently deuterium, tritium, halogen, unsubstituted or substituted C1-C2o alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C1-Czo alkyl amino, an unsubstituted or substituted Ce-C3o aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, wherein each R*® is identical to or different from each other when q is an integer of two or more, each R* is identical to or different from each other when r is an integer of two or more, each RY is identical to or different from each other when s is an integer of two or more and each R*® is identical to or different from each other when t is an integer of two or more; each of q and s 1s independently an integer of O to 5; r is an integer of 0 to 3; and t 1s an integer of 0 to 4. An onset wavelength of the first compound may be less than a maximum absorbance The first compound may include an organic compound having the following structure of [Formula 4] SS 8” J Nn " Tr 0 0 [Ed Re RE? wherein, in Formula 4, each of R®, R?, R?, R?® and R?’ is independently hydrogen, deuterium, protium, halogen, unsubstituted or substituted C;-Czo alkyl amino, unsubstituted As an example, the moiety having the structure of Formula 2 may be selected from the Fi NN 7 4 Ned CTY Bee, i n 5 oes ey C-Oo Sat 9 ay rat 3 N $C T Ny-0 { D ~ 3 La S00 0) & C0 2 FRNA 0 1 ol Yoyeg . 1 a. N = The second compound may include an organic compound having the following structure ¢ [Formula 8A] RS? R* a ® R52 RE RE [Formula 8B] RS? RS! R# R41 R#2 | N 1 3,0 QQ eC 0) [Formula 8C] Ro? / 5! QO RH R42 TL } B. fl OCC N YR 0 JU wherein, in Formulae 8A to 8C, each of R* to R* and R%! to R* is independently hydrogen, deuterium, tritium, halogen, C1-Cz0 alkyl amino, unsubstituted or substituted Ce-Cso aryl amino, unsubstituted or In one exemplary aspect, the at least one emitting material layer may have a single-layered Alternatively, the at least one emitting material layer includes a first emitting material layer The first emitting material layer may As an example, an excited triplet exciton energy level of the third compound and / or the Alternatively, an excited singlet exciton energy level of the third compound and / or the Alternatively, an excited singlet energy level of the fourth compound may be higher than an Optionally, when the at least one emitting material layer includes the first and second The third emitting material layer may include a fifth compound and a sixth compound, and In one exemplary aspect, the emissive layer may include a first emitting part disposed As an example, the first emitting part may include the at least one emitting material layer, Alternatively, the emissive layer may further include a third emitting part disposed between In another aspect, an organic light emitting device, such as an organic light emitting display It is to be understood that both the foregoing general description and the following detailed BRIEF DESCRIPTION OF THE DRAWING The accompanying drawings, which are included to provide a further understanding of the FIG.1 is a schematic circuit diagram of an organic light emitting display device in FIG. 2 is a schematic cross-sectional view illustrating an organic light emitting display FIG. 3 is a schematic cross-sectional view illustrating an organic light emitting diode FIG. 4 is a schematic graph illustrating that the luminous efficiency and color purity of an FIG. 5 1s a schematic graph illustrating that the luminous efficiency of an OLED is FIG. 6 is a schematic graph illustrating that the luminous efficiency and color purity of an FIG. 7 is a schematic diagram illustrating luminous mechanism by singlet and triplet energy FIG. 8 is a schematic cross-sectional view illustrating an OLED in accordance with another FIG. 9 is a schematic diagram illustrating luminous mechanism by singlet and triplet energy FIG. 10 is a schematic cross-sectional view illustrating an OLED in accordance with still FIG. 11 is a schematic diagram illustrating luminous mechanism by singlet and triplet FIG. 12 is a schematic cross-sectional view illustrating an OLED in accordance with still FIG. 13 is a schematic cross-sectional view illustrating an organic light emitting display FIG. 14 is a schematic cross-sectional view illustrating an OLED in accordance with still FIG. 15 is a schematic cross-sectional view illustrating an organic light emitting display FIG. 16 is a schematic cross-sectional view illustrating an OLED in accordance with still FIG. 17 is a schematic cross-sectional view illustrating an OLED in accordance with still DETAILED DESCRIPTION Reference and discussions will now be made below in detail to aspects, embodiments and The present disclosure relates to an organic light emitting diode (OLED) into which a first FIG. 1 is a schematic circuit diagram of an organic light emitting display device in The switching thin film transistor Ts is connected to the gate line GL and the data line DL, The driving thin film transistor Td is turned on by the data signal applied into the gate FIG. 2 is a schematic cross-sectional view of an organic light emitting display device 100 in All components of the organic light The substrate 110 may include, but is not limited to, glass, thin flexible material and / or (PES), polyethylenenaphthalate (PEN), polyethylene terephthalate (PET), A buffer layer 122 may be disposed over the substrate 110, and the thin film transistor Tr is A semiconductor layer 120 is disposed over the buffer layer 122. In one exemplary aspect, can prevent light from being incident toward the semiconductor layer 120, and thereby, the semiconductor layer 120 from being deteriorated by the light. Alternatively, the A gate insulating layer 124 made of an insulating material is disposed on the semiconductor The gate insulating layer 124 may include, but is not limited to, an inorganic insulating A gate electrode 130 made of a conductive material such as metal is disposed over the gate While the gate An interlayer insulating layer 132 made of an insulating material is disposed on the gate The interlayer insulating layer 132 has first and second semiconductor laver contact holes formed within the gate insulating layer 124 in FIG. 2. Alternatively, the first and second

[58] A source electrode 144 and a drain electrode 146, which are made of conductive material

[59] The semiconductor layer 120, the gate electrode 130, the source electrode 144 and the drain The thin film

[60] The gate line GL and the data line DL, which cross each other to define the pixel region P,

[61] In addition, the organic light emitting display device 100 may include a color filter layer For example, when the organic light emitting display device 100 is a bottom-emission type, A passivation layer 150 is disposed on the source and drain electrodes 144 and 146 over the While the drain contact hole 152 is The OLED D includes a first electrode 210 that is disposed on the passivation layer 150 and The first electrode 210 is disposed in each pixel region. The first electrode 210 may be an More particularly, the first In one exemplary aspect, when the organic light emitting display device 100 is a bottom- Alternatively, when the organic light emitting display device 100 is a top-emission type, a In addition, a bank layer 160 is The emissive layer 220 is disposed on the first electrode 210. In one exemplary aspect, the layer 220 may have a single-layered structure of an emitting material layer (EML). The second electrode 230 is disposed over the substrate 110 above which the emissive layer In addition, an encapsulation film 170 may be disposed over the second electrode 230 in Moreover, the organic light emitting display device 100 may have a polarizer in order to ‘When the

[71] Now, we will describe the OLED in more detail. FIG. 3 is a schematic cross-sectional view

[72] The emissive layer 220 includes an EML 240 disposed between the first and second

[73] The first electrode 210 may be an anode that provides holes into the EML 240. The first 74] The second electrode 230 may be a cathode that provides electrons into the EML 240. The function values, i.e, a highly reflective material such as Al, Mg, Ca, Ag, alloy thereof,

[75] The EML 240 may include a first compound (Compound 1) DF, a second compound

[76] ‘When holes and electrons meet each other to form excitons in the EML 240, singlet exciton The first compound DF may be delayed fluorescent material having thermally activated The delayed fluorescent material has very narrow The delayed fluorescent material must has an energy level bandgap AEst (FIG. 7) equal to The material having little energy level S1PF and the triplet energy level Ti°F can exhibit The first compound DF may be delayed fluorescent material including a first moiety of an The first compound DF with delayed fluorescent property may have the following [Formula 1] rk R : 0 I : RY Rs " wherein, in Formula 1, each of R' to R’ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or unsubstituted or substituted C;-Cao alkyl amino, an unsubstituted or substituted [Formula 2] 1 Rit J ge CX RS Ri Rs R® wherein, in Formula 2, each of R!'! to R'® is independently hydrogen, deuterium, tritium, halogen, unsubstituted or adjacent two of R" to R'® form an unsubstituted or substituted hetero aromatic ring having wherein at least adjacent two of R! to R!® form an unsubstituted or substituted hetero asterisk indicates a linking position, [Formula 3] 4 A \ 2 g2! Re wherein, in Formula 3, XisNR?”, QorS; each of R*' to R* is independently hydrogen, deuterium, tritium, halogen, unsubstituted or a dotted line indicates a fused portion. As used herein, substituent in the term “substituted” includes, but is not limited to, deuterium, cyano, -CF3, a hydroxyl group, a carboxylic group, a a C3-Cap hetero aryl group, a nitro group, a hydrazyl group, a a Ce-C30 aryl silyl group and a C3-Cso hetero aryl silyl For example, each of the C¢-C3p aromatic group, the C3-Cso hetero aromatic group, the Cs- As used herein, the term “hetero” in such as “a hetero aromatic group”, “hetero aryl”, As used herein, the term “aromatic” or “aryl” is well known in the art. The term includes azulenyl, pyrenyl, fluoranthenyl, triphenylenyl, chrysenyl, tetraphenylenyl, pleiadenyl, picenyl, pentaphenylenyl, pentacenyl, fluorenyl, indeno-fluorenyl and spiro- As used herein, the term “hetero aromatic” or “hetero aryl” refers to a heterocycles As an example, the C3-Cs3o hetero aryl group, which can constitute R! to R’ in Formula 1, tetrazinyl, imidazolyl, pyrazolyl, indolyl, iso-indolyl, indazolyl, indolizinyl, pyrrolizinyl, benzo-carbazolyl, dibenzo-carbazolyl, indolo-carbazolyl, indeno-carbazolyl, benzo-furo- quinazolinyl, quinolizinyl, purinyl, benzo-quinolinyl, benzo-iso-quinolinyl, benzo- phenanthridinyl, pteridinyl, naphthyridinyl, furanyl, pyranyl, oxazinyl, oxazolyl, benzo-thiophenyl, dibenzo-thiophenyl, difuro-pyrazinyl, benzofuro- benzothieno-benzo-thiophenyl, benzothieno-dibenzo-thiophenyl, benzothieno-benzo- In addition, the Cs-Ca0 aromatic ring and the C3-Cao hetero aromatic ring formed by two ring, a dibenzo-thiophene ring and / or combination thereof, each of which may be For example, each of the Cs-Ca0 aromatic group, the C3-Cso hetero aromatic group, fused In Formula 1, the fused hetero aromatic ring with boron and oxygen atoms acts as an Accordingly, the Since the electron donor group moiety having the structure of Formula 2 includes 5- The first compound DF having the delayed fluorescent property has excellent The first compound DF having the structure of Formula 1 includes the first moiety of the The first compound DF has a molecular conformation where the plural electron donor ‘While a part of the HOMO (Highest Occupied Molecular Orbital) can The first compound DF inducing plural electron donor moieties is designed to maximize its The first compound DF having the Formulae 1 to 3 has delayed florescent property, as well As an example, the first compound DF may have two electron donor group moieties each of In still another exemplary aspect, two electron donor group [Formula 4] B 1 * Tir 0 0 R? R% RZ wherein, in Formula 4, each of R?*, R?, RY’, R?® and R¥ is independently hydrogen, deuterium, protium, halogen, unsubstituted or substituted C1-Czo alkyl amino, unsubstituted wherein two of R?*, R% R?7, As an example, each of the Cs-C3o aryl and the C3-Cso hetero aryl of R!, R*, R%, R® and R” in Adjacent at least two of R'! to R'® in Formula 2 may form the fused hetero aromatic ring unsubstituted or substituted indene ring, an unsubstituted or substituted indole ring, an but is not limited to, an unsubstituted or substituted indeno-carbazolyl an unsubstituted or substituted indolo-carbazolyl moiety, an unsubstituted or substituted [Formula 5] J OO vk = 0 in fens ~ “Bo god of LO Oh £2 — 0 or" ( 7 WO CO o 0s, ci / ¢ J ol ©, @ ooo AS i O, Ry rd 3 Noor on OU \w / SI ae od oto 971 More particularly, the first compound DF may be selected from, but is not limited [Formula 6] 0, fps, MOE Shy 11 18 1-3 Co Oy 3 } phn J» a ay ry on NET Ey C0 TE CT NG red Ry Sly NC ty ef SE SIN A AO Fy 80 we os wd igi db LN NS SBT en Ny FN, bh? ra WHT oy ” 1-4 16 Lad 3 Oy io dary Ned FN, Ny GAT oh0 ra) ny 4 Sd 4 Ng "Cl “™ 3 °o Yel € 826 af 3 y A A oy ore by po { FA oy N.S rE - #0 ol aT 1-7 1-8 my, SE 4 Sg 0. 7.0 Da Yl C WN ¥ = © a J hgh te 0. AO wT 1-10 1-12 My 3 7 ino FL oro Ligh 8.10 _ Ey Oh a 113 1-14 1-15 > Q NN ay © Ld Je CY Vr SN Ay Lo A TSN NY Y / gm Ne Logit Yee hn Cy “ ve 0.) 6 7 coy {) OJ Ry ¥ 3 Ugly SY 1-16 117 Lt id RE Lotgise- Jb 0 SAN eN a Ya Chphdy en; ~ Loney Eoghed 2 gr" A Sod © AE o..L 0 oN Shy) Cow CONSE SW (TT) Jee Yi vl ot Fi] 2 Le od 1-18 1-19 nw EY FY LAS = A a PY NTT Ce 5 “hey we oi. 0 Tr 1-20 1-21 #7 oy yey Lely Sarl on oY eRe Nee jo ANB NLA A SN re Oph 8 nl W EXE ot 4 WF LSA ba Ed Fol > ~ G3 rN 2 (J Sw 1-22 1-23 $e Syd ye Oo SNe [lll ST TEN Sern o> £ EE 0 1-24 1.25 FNS FY J Neel, J Nel, NS a SN ny ae N “Ty A Ss Ldghd J= AO oN o. hap Soy Lot Lo tJ NJ 1-29 1-30 i$] £ I. $707 NS y £3 bo ~ Nes PD sd Te 7 Lo sh © 4 1-31 4.33 fe ye 3 30M fay x FTN Ss i oy 1-34 1-35 AN {gh IS) 7 PrN 5 OUCH Pod end SAE ~~ J. a Ng Ny or [ Jas yo 3 £ ROL NER a ~ A wie Sd § JT 8 Ng § 536 SP 4.36 1-37 Clg) SU OL ed™, 6. 0 Called ANN FT A or 7° 77 dl Oh © Sef N NN sr J OA Our of 5; > bd Seay ¥ 4% Ae CA LO ~ < p Yd, Yr iF 1-38 41.39 “0 2 { ji (ig) oye NL FET Nan” = Sy 1-40 1-41 The first compound DF of the delayed fluorescent material has little energy bandgap AEst Since the first compound DF addition charge transfer transition (CT transition) is induced in the first ‘When the EML 240 includes only the first compound DF as an emitter, the triplet exciton The EML 240 includes the second compound FD of the fluorescent material in order to

[101] The singlet exciton energy of the first compound DF, which includes the singlet exciton emission is occurred at the second compound FD. Organic material having an Since the ultimately emitting second

[102] The second compound FD in the EML 240 may be blue fluorescent material. For example, [Formula 7] R* (R*%), Ad RY Ra 0 ~p A TAQ (RY), (R%®), (RF (R%®), wherein, in Formula 7, each of R* to R* is independently hydrogen, deuterium, tritium, halogen, unsubstituted or optionally, two adjacent elements of R3! to R** form an unsubstituted or substituted fused ring having each of R*® to R* is independently deuterium, tritium, halogen, unsubstituted or substituted C1- each of q and s 1s independently an integer of Oto 5; ris an integer of 0 to 3; and t 1s an integer of O to 4.

[103] For example, each of the Cs-C3p aromatic group, the C3-Cso hetero aromatic group and the

[104] Similar to Formulae 1 to 3, the C¢-C3o aromatic group constituting each of R*! to R*® in

[105] The second compound FD of the boron-based compound having the structure of Formula 7

[106] In one exemplary aspect, R*! to R* in Formula 7 may be bound to eac Alternatively, [Formula 8A] R51 RSS 8 paege rR Res R34 [Formula 8B] RS? RS! R# ALL R# RéZ N | 1 rd N 'N C) [Formula 8C] RE RSt QL 3 R42 LB ~~ N Yq DU wherein, in Formulae 8A to 8C, each of R* to R* and R% to R¥ is independently hydrogen, deuterium, tritium, halogen, C1-C0 alkyl amino, unsubstituted or substituted Ce-Cso aryl amino, unsubstituted or

[107] As an example, each of the C¢-Cso aryl and the C3-C3o hetero aryl of R*!, R* to R* and R¥!

[108] More particularly, the second compound FD of the boron-based organic compound may be [Formula 9] Bh, & K Lag ted a CY ey Vo aud Ld yy E sg Syd aN Ne 1 Fd SL ES 5 yee Logg ea NAR Srey SAS WS Fhe 2-1 2-3 yy & ~ Hg Re ll Tr shen, ye C4 YG FL Sd Seta Bo Me ovo SR Cree Sh Lr Ne? isd J NOW ore L Nh Na ON Cry oF fy a Fae Ne eNom LAF Lo S54 2.6 (gh Nay TI 0 ~Yy pl Sohn an Ny CL ris YBN ea Nd NL gay ty Le 6J LJ N SITS Lu A Gehl Wo 3.0 “etg I rn 2 Se! NF Ny x. CN ; Mr N oN x” ? zt & ¥ 2-7 2-8 2-9 FN #2 Oo 2 i . > oN % 3 a. Lge v Stet ee ’ aN PY by heey I : Wg ATE] I RA TR SAL ¥s CLS A , AL 2-10 2-11 2-12 MA ; na ae fo ; > lel LJ 5) FON ao NOS ANA NL a a MA No Sf Clgly Sr Le J Ls £J % © rs Noah Nosy JENN EN N AT LTS oO CI hat tl Rs yr Tog J 213 2-14 2-15 Oo 3 i h EN NI, 2 - 1 RE TAA TTT St 7) Fy uy a vy fd A, , fd 12 Ag iT Rd and flay am LEA, very CY i > Aa Sg PS = A bd OR he 2.18 2-18 “0 1 “0 “YF i il oJ Co] ¢ tk } Cy I¢ Wo vy i Ay ey BA yt SF wv Fr fe J A wi! N Ah hh [J Od QoQ Qu 2.19 2-20 wo FUE NN # oF Ry 3 id {34 CLE OLD) ELAS ULL SON SNS “oN ABs Bok, Nes A Bors BoA Clow IYI 1 AAS SOUT UY my Achy hyn OY Ma MNRAS NSA Hy N Sn ~~ Ned A i, Lf Ye “YF J 7 Cy YY fy £3 Eph i Vd A A | [3 Yt po x ’ 2-21 2-22 lJ Al) yl Lh JIA SWING NIwG] A Q ) A 223 2.24 #5 ty [Th A wy eo uted LAuh Fy SON 5 aN IG SE LELL, ry Nt ANA Yelm i ¢ Yo Yeoh NA Sr STA or JQ N N 4 wd AF ag PN PN ig J "ne * ap > SL A SA LJ (J 2.25 2.26 A LEY CL hh Ald AB BL SALA we: Ltgh ey Bun Ba oy Ro erty ergy Reggie a ts. “AO 2-27 2-28 A at 2) 3 ht Sa Ng FY OFY OY omy Suh pty tJ 9 RE Ao dgodg gt wok PEN Ay AN nod Id 7 {4 I ™ Ghd 40 \ Bay 8. a, : Se OL Ak Fae E90 (EW IE (WE Sag NTI AINA ba 2 ic pp A $1 8S WARS ve wf A= 7 A 2.29 2-30 ~ ~ Fy FY YY oy oy LL DD OL Sy “5 OO IS . yb) © Pry AB Nn Moy aL LLL Whe 1 1 toa PY TY YEN EEE C2) » oo “hy LJ LJ OTe TOC LAr wistgty GENISTEIN oh pet oy fy ore OOo (UU 2-31 2-32 LOY Oy 8 SWE RING = } J ! > {ol SONY VF N x SUNY ks n Se —y A BoB I 7 IAN NRA AAA Ao A oe O00 Q SA iq { or te A r ' + " a ’ ” a9 2-33 2.34 rotated Gl) oy AB AaB 2, pd A Ape MY LY ZAP NU NN SR WAG LA) “ do BL we B.A - NY YON Y IY FEY Ig Ye DU : NEN - NL Sy Ap ig hytong oJ Fy fT ITs my YOO EE eS yy A Se RF Rp I. VERY AA hi di * hN - 2-35 2-36 FN YY AY vy Lag t BABA [Se NPN Roh i =A A HY NAA A Ln SNE NTN ONIN I i i had NTYTNTYON Ns Ved 3 Fa LW 3 o » iL 3 HE | { % I Fy Y #7 WAR RS WS WERE Te Tr ZY Fy ™y Fy Whphy Lah ABU BUA Phd Bini} a NTE NTVEINTNAE Ved A A A iF dod bh oC WF Nr ny A 2.37 2-38 gd Lai] Bn Bh EWN We Yah A PE sod 2-39 The third compound H in the EML 240 may include any organic compound having wider In an exemplary aspect, the third compound H, which may be included in the EML 240, -bis(N-carbazolyl)-1,1’-biphenyl (CBP), 3,3 -bis(N-carbazolyl)- (mCBP), 1,3-Bis(carbazol-9-yl)benzene (mCP), 9-(3-(9H-carbazol-9-yl)phenyl)-9H- (mCP-CN), Oxybis(2,1-phenylene))bis(diphenylphosphine oxide (DPEPO), 39 (PPT), 1,3,5-Tri[(3-pyridyl)-phen-3-yl]benzene 2,6-Di(9H-carbazol-9-yl)pyridine (PYD-2Cz), 2,8-di(9H-carbazol-9- (DCzDBT), 3°,5’-Di(carbazol-9-yl)-[1,1°-bipheyl]-3,5-dicarbonitrile 4’-(9H-carbazol-9-yl)biphenyl-3,5-dicarbonitrile(4’-(9H-carbazol-9-yl)biphenyl-3,5- 9-(4-(9H-carbazol-9-yl)phenyl)-9H-3,9’- In an exemplary aspect, when the EML 240 includes the first compound DF, the second It ne necessary to control an photoluminescence wavelength and an absorbance wavelength As illustrated in FIG. 4, when the degree of overlap between the photoluminescence (PL) The In one exemplary aspect, an onset wavelength Aone of the first compound DF may be of a short wavelength region in the PL spectrum of the organic compound. More the onset wavelength may be defined as a wavelength corresponding to a shorter among two wavelengths having an emission intensity corresponding to 1 / 10 of the ‘When the onset wavelength onset” of the first compound DF is between about 430 nm and Since the first compound DF includes plural electron donor group moieties, the first The As such, as the triplet exciton generated in the first compound DF is converted upwardly its On the contrary, as illustrated in FIG. 5, when the onset wavelength Aonse™ of the first In addition, when the onset wavelength Aonsel®F of the first compound is longer than 440 nm, may be deteriorated as the first compound DF and the second compound FD emit light Similarly, as illustrated in FIG. 6, when the onset wavelength Aonse™” of the first compound

[121] In other words, when the onset wavelength onset” of the first compound DF is beyond 440 of the first compound DF 1s longer than the maximum

[122] In addition, HOMO energy levels and / or LUMO energy levels among the third compound the triplet excitons generated at the delayed fluorescent material to be involved in the

[123] For example, the HOMO energy level HOMO¥ of the third compound H of the host may be

[124] As an example, an energy level bandgap ((HOMOY-HOMOP¥|) between the HOMO energy

[125] In addition, the energy level bandgap ((HOMOPF-HOMOP|) between the HOMO energy energy level HOMO™ of the second can transfer the exciton energy efficiently to the second

[126] In another exemplary aspect, the LUMO energy level LUMOPF of the first compound DF In this case, the electrons injected into the EML 240 can be

[127] On the contrary, when the energy level bandgap (HOMOPF-HOMO™)) between the HOMO The holes trapped at the second compound FD are directly recombined to form excitons with In addition, when the LUMO energy level LUMOPY of the first compound DF is deeper As an example, the first compound DF may have, but is not limited to, the HOMO energy The energy level bandgap between the HOMO energy level HOMOPF and the LUMO In case of adjusting the photoluminescence wavelength ranges of the fist compound DF and excitons can be recombined in the first compound DF of the delayed 100% of internal quantum efficiency can be realized using RISC The excited singlet exciton energy generated in the first compound DF via RISC is Now, we will describe the luminous mechanism in the EML 240. FIG. 7 is a schematic As schematically When the triplet energy level Ti¥ and / or the singlet energy level Si of the third compound In addition, the singlet exciton energy, which is generated in the first compound DF of the Optionally, the triplet energy level T\°F of the first

[135] Since the second compound FD can utilize both the singlet exciton energy and the triplet can be greatly improved owing to minimizing

[136] Returning to FIG. 3, the HIL 250 1s disposed between the first electrode 210 and the HTL In one exemplary aspect, the HIL 250 may include, but 1s not limited to, 4,4’,4”-Tris(3- (MTDATA), 4,4’,4”-Tris(N,N-diphenyl-amino)triphenylamine 4,4’ 4”-Tris(N-(naphthalene-1-yl)-N-phenyl-amino)triphenylamine (1T-NATA), 4,4’,4"- N,N’-Diphenyl-N,N’-bis(1-naphthyl)-1,1’-biphenyl-4,4”- (NPB; NPD), 1,4,5,8,9,11-Hexaazatriphenylenehexacarbonitrile (Dipyrazino[2,3-f:2°3’- HAT-CN), 1,3,5-tris[4-(diphenylamino)phenyl]benzene The

[137] The HTL 260 is disposed between the HIL 250 and the EML 240. In one exemplary aspect, HTL 260 may include, but is not limited to, N,N’-Diphenyl-N,N’-bis(3-methylphenyl)-1,1"- NPB, CBP, Poly[N,N’-bis(4-butylphenyl)-N,N’-bis(phenyl)-benzidine] Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4’-(N-(4-sec-butylphenyl)diphenylamine))] Di-[4-(N,N-di-p-tolyl-amino)-phenyl]cyclohexane (TAPC), 5-Di(9H-carbazol-9-yl)-N,N- (DCDPA), N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-

[138] The ETL 270 and the EIL 280 may be laminated sequentially between the EML 240 and the compounds, benzoxazole-based compounds, benzothiazole-based compounds, As an example, the ETL 270 may include, but is not limited to, tris-(8-hydroxyquinoline (Algs), 2-biphenyl-4-yl-5-(4-t-butylphenyl)-1,3,4-oxadiazole (PBD), spiro-PBD, lithium 1,3,5-Tris(N-phenylbenzimidazol-2-yl)benzene (TPBi), Bis(2-methyl-8-quinolinolato- (BAlqg), 4,7-diphenyl-1,10-phenanthroline (Bphen), 2,9- (NBphen), 2,9-Dimethyl-4,7-diphenyl-1,10- 1,3,5-Tri(p-pyrid-3-yl-phenyl)benzene (TpPyPB), 2,4,6- (TmPPPyTz), Poly[9,9-bis(3’-(N,N-dimethyl)-N- (PFNBr), tris(phenylquinoxaline) The EIL 280 1s disposed between the second electrode 230 and the ETL 270, and can can enhance the luminous ‘When holes are transferred to the second electrode 230 via the EML 240 and / or electrons For example, the OLED D1 of the exemplary aspect includes the EBL 265 between the TAPC, MTDATA, mCBP, CuPc, N,N’-bis[4-(bis(3-methylphenyl)amino)phenyl]-N,N’-diphenyl-[1,1’-biphenyl]-

[143] In addition, the OLED D1 may further include the HBL 275 as a second exciton blocking compounds, triazole-based compounds, phenanthroline-based compounds,

[144] For example, the HBL 275 may include a compound having a relatively low HOMO energy

[145] In the above aspect, the first compound DF having the delayed fluorescent material and the

[146] FIG. 8 is a schematic cross-sectional view illustrating an OLED in accordance with another of the present disclosure. FIG. 9 is a schematic diagram illustrating luminous

[147] As illustrated in FIG. 8, the OLED D2 includes first and second electrodes 210 and 230

[148] In one exemplary aspect, the emissive layer 220A includes an EML 240A. Also, the The EML 240A includes a first EML (EML1, lower EML, first layer) 242 disposed between One of the EML1 242 and the EML2 244 includes the first compound (first dopant) DF of The first compound DF in the EML1 242 may include any delayed fluorescent material The EML2 244 includes the second compound FD of the florescent material. The second While the having the structure of Formulae 7 to 9 has an In this exemplary aspect, the singlet exciton energy as well as the triplet exciton energy of In other words, the triplet exciton energy of the first compound DF is converted upwardly to Then, both the initial singlet As the singlet exciton energy generated in the first compound DF in the EML1 242 is Each of the EML1 242 and the EML2 244 includes the third compound H1 and the fourth As described above, the onset wavelength Aonse™F of the first compound DF may be equal to for Also, an energy level bandgap (HOMOY-HOMOPY|) between the HOMO energy levels be quenched as a non-radiative recombination, or exciton energies may not be transferred from the third and fourth

[159] Also, each of the exciton energies generated in each of the third compound H1 in the EML1

[160] Also, the singlet energy level Si" of the fourth compound H2 of the second host is higher

[161] In addition, the singlet exciton energy, which is generated in the first compound DF having

[162] Each of the contents of the third and fourth compounds H1 and H2 in the EML1 242 and the In one exemplary aspect, when the EML2 244 1s disposed adjacently to the HBL 275, the In another exemplary aspect, when the EML2 244 is disposed adjacently to the EBL 265, In one aspect, the EBL 265 may be omitted where the An OLED having a triple-layered EML will be explained. FIG. 10 is a schematic cross- As illustrated in FIG. 10, the OLED D3 includes first and second electrodes 210 and 230 In one exemplary aspect, the emissive layer 220B having single emitting part includes a The EML 240B includes a first EML (EML1, middle EML, first layer) 242, a second EML The The EMLI1 242 includes the first compound (first dopant) DF of the delayed fluorescent Also, each of the EML1 242, the EML2 244 and the EML3 246 includes the third of the first host, the fourth compound H2 of the second host and a sixth compound In accordance with this aspect, both the singlet energy as well as the triplet energy of the 242 by FRET mechanism. Accordingly, the In other words, the triplet exciton energy of the first compound DF having the delayed DF is transferred to the singlet exciton energy of the second and fifth compounds and FD2 in the EML2 244 and the EML3 246 because the first compound DF has the singlet

[172] Both the second and fifth compounds FD1 and FD2 in the EML2 244 and EML3 246 can

[173] The first compound DF of the delayed fluorescent material includes any organic compound

[174] Similar to the first and second aspects, the onset wavelength Aonset™ of the first compound

[175] Also, an energy level bandgap (HOMO®-HOMOPY|) between the HOMO energy levels The singlet and triplet energy levels among the luminous materials should be properly SiPF of the first compound DF having the delayed In addition, the singlet exciton energy, which is generated in the first compound DF having In addition, exciton energy transferred to each of the second and fifth compounds FD1 and As an example, the EML1 242 may include the first compounds DF between about 1 wt% In one exemplary aspect, when the EML2 244 is disposed adjacently to the EBL 265, the ‘When the EML3 246 is disposed adjacently to the HBL 275, the sixth compound H3 in the In still another exemplary aspect, the fourth compound H2 in the EML2 244 may be the In an alternative aspect, an OLED may include multiple emitting parts. FIG. 12 is a As illustrated in FIG. 12, the OLED D4 includes first and second electrodes 210 and 230 The emissive layer 220C includes a first emitting part 320 that includes a first EML (lower The CGL 380 is disposed between the first and second emitting parts 320 and 420 so that The first emitting part 320 includes the EML1 340. The first emitting part 320 may further 340 and a first ETL (ETL1) 370 The second emitting part 420 includes the EML2 440. The second emitting part 420 may Alternatively, the second The CGL 380 is disposed between the first emitting part 320 and the second emitting part The N-CGL 382 is disposed between the ETL1 370 and the HTL2 460 and the P-CGL 384 The N-CGL 382 transports electrons to the In this aspect, each of the EML1 340 and the EML2 440 may be a blue emitting material As an example, when the EML1 340 and / or the EML2 440 includes the first to third In one exemplary aspect, the EML2 440 may include the first and second compounds DF In FIG. 12, each of the EML1 340 and the EML2 440 has a single-layered structrue. In the OLED D4, the singlet exciton energy of the first compound DF of the delayed FIG. 13 is a schematic cross-sectional view illusrating an organic light emitting display The substrate 510 may be a glass substrate or a flexible substrate. For example, the flexible A passivation layer 550 is disposed over the thin film transistor Tr. The passivation layer The OLED D is disposed over the passivation layer 550, and includes a first electrode 610 The first electrode 610 is separately formed for each of the first to third pixel regions P1, P2 The first electrode 610 may be one of an anode and a cathode, and the second electrode 630 For example, the first electrode 610 may be an anode and may include conductive material The second electrode 630 may be a cathode and may include conductive ‘When the organic light emitting display device 500 is a bottom-emission type, the first type, the first electrode 610 may have a triple-layered structure of ITO / Ag / ITO or Also, the second electrode 630 is thin so as to have light-transmissive (or semi- A bank layer 560 is disposed on the passivation layer 550 in order to cover edges of the first An emissive layer 620 is disposed on the first electrode 610. In one exemplary aspect, the

[206] In one exemplary aspect, the EML of the emissive layer 630 in the first pixel region P1 of

[207] An encapsulation film 570 is disposed over the second electrode 630 in order to prevent

[208] The organic light emitting display device 500 may have a polarizer in order to decrease Alternatively, when the organic light emitting display device 500 is a top emission type, the

[209] FIG. 14 is a schematic cross-sectional view illustrating an OLED in accordance with still

[210] The first electrode 610 may be an anode and the second electrode 630 may be a cathode. As

[211] The emissive layer 620 includes an EML 640. The emissive layer 620 may include at least In addition, the emissive layer 620 may further include an auxiliary hole transport layer The auxiliary HTL 662 may The first auxiliary HTL 662a has a first thickness, the second auxiliary HTL 662b has a Owing to the first to third auxiliary HTLs 662a, 662b and 662¢ having different thickness to In FIG. 14, the first auxiliary HTL 662a is located in the first pixel region P1. Alternatively, In The EML 640 includes a first EML (EML1) 642 located in the first pixel region P1, a In one exemplary aspect, the EML1 642 located in the first pixel region P1 may include the In the EML1 642, the contents of the third compound H may be larger than or equal to the The EML2 644 located in the second pixel region P2 may include a host and a green dopant The OLED D5 emits blue light, green light and red light in each of the first to third pixel The organic light emitting display device 500 may further include a color filter layer ‘When the organic light emitting display device 500 is a bottom-emission type, the color FIG. 15 is a schematic cross-sectional view illustrating an organic light emitting display

[224] The substrate 1010 may be a glass substrate or a flexible substrate. For example, the flexible

[225] The color filter layer 1020 is located over the substrate 1010. As an example, the color filter

[226] A passivation layer 1050 is disposed over the thin film transistor Tr and the color filter layer The passivation layer 1050 has a flat top surface and includes a drain contact hole 1052 that

[227] The OLED D is disposed over the passivation layer 1050 and corresponds to the color filter The first electrode 1110 is separately formed for each of the first to third pixel regions P1, For example, the first electrode 1110 may be an anode and may include conductive material The second electrode 1130 may be a cathode and may include conductive The emissive layer 1120 is disposed on the first electrode 1110. The emissive layer 1120 At least one of the at least two emitting parts may include the first compound DF of the A bank layer 1060 is disposed on passivation layer 1050 in order to cover edges of the first Moreover, the organic light emitting display device 1000 may further include an In the organic light emitting display device 1000 in FIG. 15, the first electrode 1110 1s a That 1s, the organic light emitting display Alternatively, the first electrode 1110 may be a reflective In the organic light emitting display device 1000, the OLED D located in the first to third A color conversion film may be disposed between the OLED D and the color filter layer color conversion film corresponds to the first to third pixel regions P1, P2 and P3, and For example, the color conversion film may include quantum dots. Accordingly, the FIG. 16 is a schematic cross-sectional view illustrating an OLED in accordance with still

[238] The emissive layer 1120 includes a first emitting part 1220 including a first EML (lower 1380 disposed between the second emitting part 1320 and the third emitting part 1420. 1280, the second emitting part 1320, the CGL2

[239] The first emitting part 1220 may further include at least one of an HIL 1250 disposed 1240, a first HTL (HTL1) 1260 disposed between the 1280. Alternatively, the first emitting part 1220 may further include at least one of a first EBL 1260 and the EML1 1240 and a first HBL (HBL1) 1275

[240] The second emitting part 1320 may further include at least one of a second HTL (HTL2) 1280 and the EML2 1340 and a second ETL (ETL2) 1370 disposed

[241] The third emitting part 1420 may further include at least one of a third HTL (HTL3) 1460

[242] The CGL1 1280 is disposed between the first emitting part 1220 and the second emitting 1280. The CGL1 1280 may be a PN-junction CGL that junctions a first N-type CGL (N-CGL1)

[243] The N-CGL1 1282 is disposed between the ETL1 1270 and the HTL2 1360 and the P- 1284 is disposed between the N-CGL1 1282 and the HTL2 1360. The N-CGL1 1282 transports 1240 of the first emitting part 1220 and the P-CGL1 1284 transport holes to the

[244] The CGL2 1380 is disposed between the second emitting part 1320 and the third emitting

[245] The N-CGL2 1382 is disposed between the ETL2 1370 and the HTL3 1460 and the P-

[246] In this aspect, one of the first to third EMLs 1240, 1340 and 1440 may be a blue EML,

[247] As an example, the EML1 1240 may be a blue EML, the EML2 1340 may be a green EML 1240 may be a red EML, the EML2

[248] The EMLI1 1240 may include the first compound DF of the delayed fluorescent material The EML1 1240 In the EMLI1 1240, the contents of the third compound H may be equal to or larger than the exciton energy from the first compound DF to the second The EML2 1340 may include a host and a green dopant and the EML3 1440 may include a The OLED D6 emits white light in each of the first to third pixel regions P1, P2 and P3 and FIG. 17 is a schematic cross-sectional view illustrating an OLED in accordance with still The emissive layer 1120A includes a first emitting part 1520 comprising an EML1 (lower 1580 disposed between the first emitting part 1520 and the second emitting part 1620 1580, the second emitting part 1620, the CGL2

[254] The first emitting part 1520 may further include at least one of an HIL 1550 disposed 1550 and an ETL1 1570 disposed between the EML1 1540 and the CGL1 1580. 1565 disposed between the

[255] The EML2 1640 of the second emitting part 1620 includes a middle lower EML (first layer)

[256] The third emitting part 1720 may further include at least one of an HTL3 1760 disposed 1765 disposed between the

[257] The CGL1 1580 is disposed between the first emitting part 1520 and the second emitting 1580. The CGLI1 1580 may be a PN-junction CGL that junctions an N-CGL1 1582 with a P- 1584. The N-CGL1 1582 is disposed between the ETL1 1570 and the HTL2 1660 and the P- The CGL2 1680 is disposed between the second emitting part 1620 and the third emitting The N-CGL2 1682 is disposed between the ETL2 1570 and the HTL3 1760 and the P- In this aspect, each of the EML1 1540 and the EML3 1740 may be a blue EML. In an In one exemplary aspect, the EML3 1740 may include the first and second compounds DF 1540, and thus the EML3 1740 may emit light different from the 1540 or may have different luminous efficiency different from the As an example, each of the EML1 1540 and the EML3 1740 includes the first to third 1540 and the EML3 1740. In this case, One of the middle lower EML 1642 and the middle upper EML 1644 of the EML2 1640 As an example, the middle lower EML 1642 of the green EML may include the host and the 1644 may include the third material, the green and red fluorescent material and the green and red delayed

[264] The OLED D7 emits white light in each of the first to third pixel regions P1, P2 and P3 and

[265] In FIG. 17, the OLED D7 has a three-stack structure including the first to three emitting 1520, 1620 and 1720 which includes the EML1 1540 and the EML3 1740 as a blue EML. 1540 and the EML3 1740 as a blue Example 1 (Ex. 1): Fabrication of OLED

[266] An OLED in which an EML includes 2,8-di(9H-carbazol-9-yl)dibenzo[b,d]thiophene 1-1 of Formula 6 (HOMO: -5.58 eV, LUMO: -2.6 eV, chamber for depositing emission layer. Subsequently, an anode, an

[267] An anode (ITO, 50 nm); an HIL (HAT-CN, 7 nm); an HTL (NPB, 45 nm); an EBL (TAPC,

[268] After the emissive layer and the cathode were deposited, the OLED was transferred from eg SOL & Ort v oA \ A NN N N= H—=N Sp J \ & WN HIL : HAT-CN HTL: NPB EBL: TAPC UB Sei o OO Ne 0 l 0 k 40; oO 2 2 O 0 GQ = J OC HBL : B3PYMPM ETL: TPBi Host: DCzDBT Example 2 (Ex. 2): Fabrication of OLED

[269] An OLED was fabricated using the same materials as Example 1, except that DczDBT (69 Example 3 (Ex. 3): Fabrication of OLED

[270] An OLED was fabricated using the same materials as Example 2, except that Compound 2- (HOMO: -5.5 eV, LUMO: -2.8 eV, maximum absorbance wavelength (Abs Amax): 459 nm) of Example 4 (Ex. 4): Fabrication of OLED An OLED was fabricated using the same materials as Example 2, except that Compound 2- Example 5 (Ex. 5): Fabrication of OLED An OLED was fabricated using the same materials as Example 1, except that Compound 1- Example 6 (Ex. 6): Fabrication of OLED An OLED was fabricated using the same materials as Example 5, except DczDBT (69 wt%) 1-5 (30 wt%) as the first compound and Compound 2-20 (1 wt%) of Example 7 (Ex. 7): Fabrication of OLED An OLED was fabricated using the same materials as Example 6, except that Compound 2- Example 8 (Ex. 8): Fabrication of OLED An OLED was fabricated using the same materials as Example 6, except that Compound 2- Example 9 (Ex. 9): Fabrication of OLED An OLED was fabricated using the same materials as Example 1, except that Compound 1- Example 10 (Ex. 10): Fabrication of OLED An OLED was fabricated using the same materials as Example 9, except DczDBT (69 wt%) Example 11 (Ex. 11): Fabrication of OLED An OLED was fabricated using the same materials as Example 10, except that Compound Example 12 (Ex. 12): Fabrication of OLED An OLED was fabricated using the same materials as Example 10, except that Compound Example 13 (Ex. 13): Fabrication of OLED An OLED was fabricated using the same materials as Example 1, except that Compound 1- Example 14 (Ex. 14): Fabrication of OLED An OLED was fabricated using the same materials as Example 13, except DczDBT (69 Example 15 (Ex. 15): Fabrication of OLED An OLED was fabricated using the same materials as Example 14, except that Compound Example 16 (Ex. 16): Fabrication of OLED An OLED was fabricated using the same materials as Example 14, except that Compound Comparative Example 1 (Com. 1): Fabrication of OLED An OLED was fabricated using the same materials as Example 1, except that the following Comparative Example 2 (Com. 2): Fabrication of OLED An OLED was fabricated using the same materials as Comparative Example 1, except Comparative Example 3 (Com. 3): Fabrication of OLED An OLED was fabricated using the same materials as Example 1, except that the following Comparative Example 4 (Com. 4): Fabrication of OLED An OLED was fabricated using the same materials as Comparative Example 3, except Comparative Example 5 (Com. 5): Fabrication of OLED

[288] An OLED was fabricated using the same materials as Example 1, except that the following Comparative Example 6 (Com. 6): Fabrication of OLED

[289] An OLED was fabricated using the same materials as Comparative Example 6, except Comparative Example 7 (Com. 7): Fabrication of OLED

[290] An OLED was fabricated using the same materials as Example 1, except that the following Comparative Example 8 (Com. 8): Fabrication of OLED

[291] An OLED was fabricated using the same materials as Comparative Example 6, except [Reference Compounds] o. or C0) OAO Wi Ay TT wf roger Re FLA ood La Ne NY {4 wr FR 400 53 Se CY atl” LE yt Oo, ed 0.7) Ref. 1 Ref. 2 Ref. 3 Ref. 4 Experimental Example 1: Measurement of Luminous Properties of OLED Each of the OLED fabricated in Ex. 1-16 and Ref. 1-8 was connected to an external power Table 1: Luminous Properties of OLED Table 2: Luminous Properties of OLED As indicated in Tables 1 and 2, compared to the OLEDs fabricated in Ex. 1, 5, 9 and 13 in and 14-16 in which the first compound having plural electron donor moieties and onset More particularly, compared to the OLEDs fabricated in Com. 2, 4, 6 and 8 in which the

[295] It will be apparent to those skilled in the art that various modifications and variations can be Thus, it is intended that the present

[296] Also disclosed herein are the following numbered clauses: 1. An organic light emitting diode including: a first electrode; a second electrode facing the first electrode; and an emissive layer disposed between the first and second electrodes and including at least one emitting material layer, wherein the at least one emitting material layer includes a first compound and a second compound, and wherein the first compound has the following structure of Formula 1 and the second compound has the following structure of Formula 7: [Formula 1] RZ { C A : 0 I : R¢ RS e wherein, in Formula 1, each of R! to R? is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted C1-Cao alkyl, unsubstituted or substituted Ci-Czo alkyl amino, an unsubstituted or substituted Cs-C30 aromatic group or an unsubstituted or substituted C3-Cso hetero aromatic group, wherein two to four of R! to R? are a moiety having the following structure of Formula 2, [Formula 2] gi Ri? 5 N Rie Rid / R'7 5 Rie wherein, in Formula 2, each of R!' to R®™ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Cao alkyl silyl, unsubstituted or substituted C;-Czo alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, or adjacent two of R!! to R'® form an unsubstituted or substituted hetero aromatic ring having the following structure of Formula 3, wherein at least adjacent two of R!! to R'® form an unsubstituted or substituted hetero aromatic ring having the following structure of Formula 3; and asterisk indicates a linking position, [Formula 3] A A § R2 ) RZ wherein, in Formula 3, XisNR* QorS: each of R¥ to R® is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C;-Czo alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group; and a dotted line indicates a fused portion, [Formula 7] Re? (R®), Bf) am Q, BE CU Q (Rg ( RS), (R* wherein, in Formula 7, each of R* to R™ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C;-Czo alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, optionally, two adjacent elements of R’! to R* form an unsubstituted or substituted fused ring having boron and nitrogen; each of R*® to R* is independently deuterium, tritium, halogen, unsubstituted or substituted Ci-Cao alkyl, unsubstituted or substituted Ci-Cao alkyl silyl, unsubstituted or substituted Ci-Czo alkyl amino, an unsubstituted or substituted Cs-C3o aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, wherein each R* is identical to or different from each other when q is an integer of two or more, each R* is identical to or different from each other when r is an integer of two or more, each R* is identical to or different from each other when s is an integer of two or more and each R*® is identical to or different from each other when t is an integer of two or more; each of q and s 1s independently an integer of 0 to 5; r is an integer of O to 3; and t 1s an integer of 0 to 4. organic light emitting diode of clause 1, wherein the first compound includes an organic [Formula 4] “LL B g 7 * Tir 0 0 R® R28 RZ wherein, in Formula 4, each of R”, R%, R?’, R? and R? is independently hydrogen, deuterium, protium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Cao alkyl amino, unsubstituted or substituted Cs-Cso aryl or unsubstituted or substituted C3-Cso hetero aryl, , wherein two of R25, R%, R27, R28 and R? have the structure of Formula 2. hoo WE C-O'D J 3 0 : | & ot od 3, LB A PN 3, ne Mr “4 iF doe TR 6. The organic light emitting diode of clause 1, wherein the first compound is selected from: 2 hy Ny oh Lo a oho ae or 11 13 co Clo) AY Ly Ty Cy O <A ) 2 om Je Ad {Agi dyad red SL \ JOON & 8 © ry = 1s, AK oF Bry 2 Oi. 0 WLS SR oY 3,00 OW TY om oh 0 hy 5 a Pf YJ oe 1-5 1-6 SON 7y a or Ty Fe 0.4 fal Pa aN A Se = i > fod £ SN yey ERs ZY Cry, ov § iS ey = = Ligey a? To etd og SY Ou o. i.e OS 0A Try 4 7 4 0 1-7 Seed &r : y ~ © el 1 5 FON Isl 0 3 at sy Re : ‘ | 5, § : Sn fA te 9. 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SAG - y LA ) £ sgt J - - 7 5g FR FNS 9. hy jg Fed \ hg OSA yy a Tr Neel Appi de a [Say No J 0 “ 6 Ne = (J eu 1-26 1-27 1-28 iN 7 Nerd, jo 8 Re J Nel FON ao Ny Sf TR FS Lp 0.1 0 FN Oy Ly 3 an NET NN ye Sl lg LJ Ss J ] Is Op y® 0 Se i, 1-28 1-30 9 Cg 3 Ti 8 > 5 FO Ns, on Ny ed LL) bos a oly Fw EN ¥ Bee Sy Nar 4.31 4.33 I Nam ay ae NITY Loud ut Lo ging 6. 0 ANN, Mey 1-34 1-35 EN A, rely iO hl J a Eo 2 Au a men GLE nN Adhd Rh Rs ~~ LY i WN NL i Ee -_ ad CN ay a NT AA NY PY TLS i Joi Sgt esa, pg Ws 0. }.0 oho LW Su 4.36 1-37 Cl eg Yet i oi 0 nd Ne £0 fS Ls 3 et 1-38 41.39 EN my 7 3 G 4 Lt hs + al Sly Ag oh ey i ] (pl) O40 J Y Sew nd Sy Asus” 1-40 1.41 organic light emitting diode of clause 1, wherein the second compound includes an o [Formula 8A] RS! R% 3.L) 1 »a RE a RE3 RE [Formula 8B] R52 RS! R 41 RE ALO CJ £X Or 'N N 0) [Formula 8C] RS RY! QL RH R4? FE } B. N OCC N 8 1 Tl R 0 JO wherein, in Formulae 8A to 8C, each of R* to R* and R*! to R* is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted C1-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C1-Cao alkyl amino, unsubstituted or substituted Cs-C3o aryl unsubstituted or substituted Cs-C3o aryl or unsubstituted or substituted Cs-Csp hetero Wes, ke Lagat ANA Nn [8 I] LA gad BY § Noh Nosy 8.4 RJ B4 . Shr, mp hots poll 0) TC, TCL gt els Sg) . rN Ns rm Ns 2.4 2.2 2.3 | NJ 7 Fl = ~ hon, oN £o ¥ SN oy Cig os a Ligh, Fras Re AGT AN Ere A Sd UN UG TF 13 roo oy ee 24 2-5 rE Ss FN CLL (gh) ANA Ny Tg yy 5 # BN 5 AN Ns J ob 3 aN ~~ 2 Sadr, an NS LT i vA N fy ner, La J LA ory Rit iii NET OERe” N nN 2.7 2-9 yy ©) 3 oy Spay ney pts a a Mere Cel] Sos, cr LAGE RS heey ik, aro oN [~ wet? sR FN No ~ fo } PE 2.10 2.42 ~y) (1 <) at Crore 3 e CY 7 peed TNS (a RN of 5 GMO = ore. = x AR LN AAR « ¥ SHORE # 2-13 2-14 2-15 N fe or fo # a oF i She y iy Se ENN ao RES Ly 1 od CEs wt ARS Sete A Pay & HNN fy ¢ 3 Ay N= Play LA ANN he LEC, Y IS 2-16 2-18 SWE ROWE Oe Cy 0 BEN 8 oe LB BN o NF NSF NF ft N A N X oA ‘N 2 “N Lod 30 OCG 2-19 2-20 "WEY FY vy SY NOVY LOC i . #N AB BUA, Neg wha TX X { r 1 AAS Ca NTN a NF SNA Nek, Fara J Med ey dE oY PY COCR I LL LEY CLE C0) = nd LA EN #N AB BUA = BREN SE TOY 1 pr GRE dN LH dT MS grt ESN NE gS EE La NIAAA ON N N NY WA Ay AN SY Oy Y A 2-21 2-22 QO YC yO Sp Lowes am Paral ares OLE, LY Fy ™ PY 4WE RONG Bin TATA rR WOW Joo py S ¢ Ny A Ny u He Ma So is 2-23 2-24 2 PL LAS LJ Koy i Fe oy" ey Bl 5 } ¥ 3 oe Rh Bh po EOL ey ONT NNN Cd a PNA NRE ANAS oh, Ig I No Veta A | Creaid Ore a0 es A CO. Wg $ wd ay 3 N \ © A rr— i UJ - an ~ 0 Res wd A, oh ' 4; 0 2.25 2.26 ANE NP) 3 CY £1) 1 J Ulghd K ANY Se WJ Bn Ay AREY 2 = “het nnd Shy Addy Agi i JEAN i Y [ig ~ #3) % yy WR UE Ig 2, LJ 2.57 2-28 J Cn Od © 0 Bu Buy fy A Ba Na UN Bp Sen Ley SN Neg LEA Ss 1, LIT CO AA hy oh AN SEES “TY PY ry Ty Wt BE OWS od Md bE Ld 3,0 0 a A AEE ok PL Yad Apts pl fe NOVINTEIN TENA XXII 4 Je 2-29 2-30 5, F S00 SBN yp i 7 BJ oi) OS OO . (ak SN ey a my ers a Bua uN a Ny w APRN TOL TOC fs 4 - - A n AN, tt a foro SO Ory Lr OO, VE Ce 2-31 2.32 Fh 2S hy py AMA ne Ay ABB CATIA Ay LA w= eS i i A ANA AN AN PN 4 LG i . . Ne ANN ey 5 “ly } i Oi . Bo NL NLT Sm OY YT Ue Cal Ile ens f Ned, A, ANE UU in - 7% Id hy #3 ut Sy 2-33 2-34 U2 YM NEN ey A NY Ly WJ Abt LA oS e Bn 5, ™ 0 a JB Be NANA ENE [FFT TT AA A L Py 7 EN Ou NANT NEN GEN XB BL Pa yb Aphaged D0 0 Ree 0 Ryo ah Ne 2-36 FY YY MANY ANS a FiyBesy B.A, Eh Ey A Adhd dad ONIN NAS \ 3 i J FE et Ny SY OF RDO WWD “ARS RNS 2-35 2-36 hy Py FN ENN What dd aD SAN SVEN SENTRY ABB. GULCH D Sov rwisy WNC TLL LX al { 1 87 Fy Fy 'g. ey fy 4% SON RS ond ead GH Aa i i ay Y [EN | Sy N 2:37 2-38 CLE OL nN Ea Bh SANIT ETT 5 Conbrndor yp toy LJ pr A A Lod I my SA AE RAD The organic light emitting diode of clause 9, the single-layered emitting material layer further The organic light emitting diode of clause 10, wherein the single-layered emitting material layer wherein the first emitting material layer includes the first compound and the second emitting material layer includes the second compound. The organic light emitting diode of clause 14, wherein the first emitting material layer further wherein at least one of the first emitting part and the second emitting part includes the at least one emitting material layer. a substrate; and the organic light emitting diode according to claim 1 and disposed over the substrate.

Claims

WHAT IS CLAIMED IS:

1. An organic light emitting diode including: a first electrode; a second electrode facing the first electrode; and an emissive layer disposed between the first and second electrodes and including at least one emitting material layer, wherein the at least one emitting material layer includes a first compound and a second compound, and wherein the first compound has the following structure of Formula 1 and the second compound has the following structure of Formula 7: [Formula 1] R2 \ RY : 0 1 : Ae Rs & wherein, in Formula 1, each of R' to R? is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted C1-Cao alkyl, unsubstituted or substituted Ci-Czo alkyl amino, an unsubstituted or substituted Cs-C3o aromatic group or an unsubstituted or substituted C3-Cso hetero aromatic group, wherein two to four of R! to R® are a moiety having the following structure of Formula 2 [Formula 2] Rt | ” ’ N Rie RH & iy R4 Z Ri wherein, in Formula 2, each of R!" to R'™ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C;-Czo alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, or adjacent two of R' to R'® form an unsubstituted or substituted hetero aromatic ring having the following structure of Formula 3, wherein at least adjacent two of R!! to R'® form an unsubstituted or substituted hetero aromatic ring having the following structure of Formula 3; and asterisk indicates a linking position, [Formula 3] A C [Ne R? 1 id wherein, in Formula 3, XisNR?», QorS; each of R¥ to R® is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Cao alkyl, unsubstituted or substituted Ci-Cao alkyl silyl, unsubstituted or substituted Ci-C2o alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group; and a dotted line indicates a fused portion, [Formula 7] Re? (R%), He Bp 1 aw Q, BE OU (w, (Re wherein, in Formula 7, each of R* to R™ is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted Ci-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C;-Czo alkyl amino, an unsubstituted or substituted Cs-Cso aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, optionally, two adjacent elements of R'! to R* form an unsubstituted or substituted fused ring having boron and nitrogen; each of R* to R*® is independently deuterium, tritium, halogen, unsubstituted or substituted C1-Cao alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted Ci-Czo alkyl amino, an unsubstituted or substituted Cs-C30 aromatic group or an unsubstituted or substituted C3-C3o hetero aromatic group, wherein each R* is identical to or different from each other when q is an integer of two or more, each R* is identical to or different from each other when r is an integer of two or more, each R* is identical to or different from each other when s is an integer of two or more and each R*® is identical to or different from each other when t is an integer of two or more; each of q and s 1s independently an integer of O to 5; ris an integer of 0 to 3; and t 1s an integer of 0 to 4.

2. The organic light emitting diode of claim 1, wherein an onset wavelength of the first compound is less than a maximum absorbance wavelength of the second compound.

3. The organic light emitting diode of claim 2, wherein the onset wavelength of the first compound is between about 430 nm and about 440 nm 4. The organic light emitting diode of any of claims 1-3, wherein the first compound includes an organic compound having the following structure of Formula 4: [Formula 4] “2 3 B 7 " Ti 7 0. 0 RS R® RZ wherein, in Formula 4, each of R%, R¥, RY, R® and R? is independently hydrogen, deuterium, protium, halogen, unsubstituted or substituted C1-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl amino, unsubstituted or substituted Cs-C3o aryl or unsubstituted or substituted C3-Cso hetero aryl, , wherein two of R¥, R%, R?, R? and R have the structure of Formula 2.

5. The organic light emitting diode of any of claims 1-4, wherein the moiety having the structure of Formula 2 is selected from the following moieties: 7 EP CTSA OL wr ey SO 07 @ Fo OC Se 5 N. <I N-0 7 SAT =A nt # 3 A 3 o a, i Png” 0 3-03 1 N 7 Tg OG No 6. The organic light emitting diode of any of claims 1-5, wherein the first compound is selected from: 2 hy Ny oh Lo a oho ae or 11 13 co Clo) AY Ly Ty Cy O <A ) 2 om Je Ad {Agi dyad red SL \ JOON & 8 © ry = 1s, AK oF Bry 2 Oi. 0 WLS SR oY 3,00 OW TY om oh 0 hy 5 a Pf YJ oe 1-5 1-6 SON 7y a or Ty Fe 0.4 fal Pa aN A Se = i > fod £ SN yey ERs ZY Cry, ov § iS ey = = Ligey a? To etd og SY Ou o. i.e OS 0A Try 4 7 4 0 1-7 Seed &r : y ~ © el 1 5 FON Isl 0 3 at sy Re : ‘ | 5, § : Sn fA te 9. Xe > $ ay +73 or 5 ) : + vr 2 ooh ITN 5 Ny J ~~ Yds 1-10 4.42 td) 70 J) ny en NET 13.57 1 § 56 0 a he OR, fara EL 1-13 115 Ny i ™ A 0 Lg $i Ld 1-16 4-17 © Rand 0. + 0 hed dn i LIS RANTS Srl end 5 <y on FN QA 6 STN CAGE AD WANG TTR AY Yt ON NOs LU oo = OLE LA NL 1-18 1-19 ay Ld [a YL SA ped Ly N xe Men NT LN \ 4 Re ~¢ a bene % A hd 0.0 AGL J EBT C10 1.20 4-21 ~ Fh JE Cd NY FT Foxy ee RF (ely Nae ad EUS rey Tt LAN NAL NL Vd, OLA 0 ul N ¢ 30 Y EY ON wl oy. had L J cag Ny <= FF ae 2 fet 1-22 1-23 Cl Yt ny Shh SR Woon 2 oo Lo £0 se Nay oo my 1-24 1.25 Fa ty zr Cid Nad a! SAG - y LA ) £ sgt J - - 7 5g FR FNS 9. hy jg Fed \ hg OSA yy a Tr Neel Appi de a [Say No J 0 “ 6 Ne = (J eu 1-26 1-27 1-28 iN 7 Nerd, jo 8 Re J Nel FON ao Ny Sf TR FS Lp 0.1 0 FN Oy Ly 3 an NET NN ye Sl lg LJ Ss J ] Is Op y® 0 Se i, 1-28 1-30 9 Cg 3 Ti 8 > 5 FO Ns, on Ny ed LL) bos a oly Fw EN ¥ Bee Sy Nar 4.31 4.33 I Nam ay ae NITY Loud ut Lo ging 6. 0 ANN, Mey 1-34 1-35 EN A, rely iO hl J a Eo 2 Au a men GLE nN Adhd Rh Rs ~~ LY i WN NL i Ee -_ ad CN ay a NT AA NY PY TLS i Joi Sgt esa, pg Ws 0. }.0 oho LW Su 4.36 1-37 Cl eg Yet i oi 0 nd Ne £0 fS Ls 3 et 1-38 41.39 EN my 7 3 G 4 Lt hs + al Sly Ag oh ey i ] (pl) O40 J Y Sew nd Sy Asus” 1-40 1.41 7. The organic light emitting diode of any of claims 1-6, wherein the second com includes an organic compound having the following structure of Formula 8A to 8C: [Formula 8A] RS! R% 3.L) 1 »a RE a RE3 RE [Formula 8B] R52 RS! R 41 RE ALO CJ £X Or 'N N 0) [Formula 8C] RS RY! QL RH R4? FE } B. N OCC N 8 1 Tl R 0 JO wherein, in Formulae 8A to 8C, each of R* to R* and R*! to R* is independently hydrogen, deuterium, tritium, halogen, unsubstituted or substituted C1-Czo alkyl, unsubstituted or substituted Ci-Czo alkyl silyl, unsubstituted or substituted C1-Cao alkyl amino, unsubstituted or substituted Cs-C3o aryl amino, unsubstituted or substituted Ce-C3o aryl or unsubstituted or substituted C3-Cso hetero aryl.

8. The organic light emitting diode of any of claims 1-7, wherein the second compound is selected from: Hoy op PE ° ANN {FE YF Stig CE Net od IF a. She, mK Hn < Sp Leip Sptgint NN ny Nod Neos, as NAN A FD Er SAT CT 2.4 2.2 2.3 YN 1 RT a bo oo Chon, A Ci Oy es Fn om Lr FORTY £7 1 T Wl Spt gi Aaa Ros a hg a No Na I tA oN AN J, CR WE ZN i 2 hah aN Aes LF (I ag Nai Na 3 id ji Ores “oF 2-4 2-5 2-6 I) - A Sha fi = a 1 Cores aL ee a 8 Try aN LL ory or & £7 SU MN 17 2-8 2-7 . % Suh § Af ~ wd #5 3 Ly - = vey Cig) CL Sl Na SN Nis Crete ryt oe " sodaf wd Es ore . a Nya + STN ] 5 dl 2.10 543 ~y) (1 <) at Crore 3 e CY 7 peed TNS (a RN of 5 GMO = ore. = x AR LN AAR « ¥ SHORE # 2-13 2-14 2-15 Pay & HNN fy ¢ 3 Ay N= Play LA ANN he LEC, Y IS ay nied - Oo £3 0 WE Noa CLs Le TOL rb aN Nal ~ ATL. AA LIA. HA We wh LU 2416 2-18 OG OL QL CLI ABBA oe Bh Lapdog SHY ny tpg 30 OCG 2-19 2-20 "WEY FY vy SY NOVY LOC i . #N AB BUA, Neg wha TX X { r 1 AAS Ca NTN a NF SNA Nek, Fara J Med ey dE oY PY COCR I LL LEY CLE C0) = nd LA EN #N AB BUA = BREN SE TOY 1 pr GRE dN LH dT MS grt ESN NE gS EE La NIAAA ON N N NY WA Ay AN SY Oy Y A 2-21 2-22 QO YC yO Sp Lowes am Paral ares OLE, LY Fy ™ PY 4WE RONG Bin TATA rR WOW Joo py S ¢ Ny A Ny u He Ma So is 2-23 2-24 2 PL LAS LJ Koy i Fe oy" ey Bl 5 } ¥ 3 oe Rh Bh po EOL ey ONT NNN Cd a PNA NRE ANAS oh, Ig I No Veta A | Creaid Ore a0 es A CO. Wg $ wd ay 3 N \ © A rr— i UJ - an ~ 0 Res wd A, oh ' 4; 0 2.25 2.26 ANE NP) 3 CY £1) 1 J Ulghd K ANY Se WJ Bn Ay AREY 2 = “het nnd Shy Addy Agi i JEAN i Y [ig ~ #3) % yy WR UE Ig 2, LJ 2.57 2-28 J Cn Od © 0 Bu Buy fy A Ba Na UN Bp Sen Ley SN Neg LEA Ss 1, LIT CO AA hy oh AN SEES “TY PY ry Ty Wt BE OWS od Md bE Ld 3,0 0 a A AEE ok PL Yad Apts pl fe NOVINTEIN TENA XXII 4 Je 2-29 2-30 5, F S00 SBN yp i 7 BJ oi) OS OO . (ak SN ey a my ers a Bua uN a Ny w APRN TOL TOC fs 4 - - A n AN, tt a foro SO Ory Lr OO, VE Ce 2-31 2.32 Fh 2S hy py AMA ne Ay ABB CATIA Ay LA w= eS i i A ANA AN AN PN 4 LG i . . Ne ANN ey 5 “ly } i Oi . Bo NL NLT Sm OY YT Ue Cal Ile ens f Ned, A, ANE UU in - 7% 2-33 2.34 Id hy #3 ut Sy Ly Lys Sept a Lg] AA A L Py 7 EN Ou NANT NEN GEN XB BL Pa yb Aphaged D0 0 Ree 0 Ryo ah Ne 2-35 2-36 2-36 FY YY MANY ANS a FiyBesy B.A, Eh Ey A Adhd dad ONIN NAS \ 3 i J FE et Ny SY OF RDO WWD “ARS RNS ¢ 3 5 fF Re. yb wot Ore ntti kPa S NANFA 7 = a ; ¥ FY 2) #4 0 pod GREW ay Y [EN | Sy N 2:37 2-38 CLE OL nN Ea Bh SANIT ETT 5 Conbrndor yp toy LJ pr A A Lod I my SA AE RAD 9. The organic light emitting diode of any of claims 1-8, wherein the at least one emitting material layer includes a single-layered emitting material layer.

10. The organic light emitting diode of claim 9, the single-layered emitting material layer further includes a third compound.

11. The organic light emitting diode of claim 10, wherein the single-layered emitting material layer includes the first compound of about 10 to about 40% by weight, the second compound of about 0.1 to about 5% by weight and the third compound of about 55 to about 85% by weight.

12. The organic light emitting diode of claim 10 or 11, wherein an excited triplet exciton energy level of the third compound is higher than an excited triplet exciton energy level of the first compound and the exited triplet exciton energy level of the first compound is higher than an excited triplet exciton energy level of the second compound.

13. The organic light emitting diode of any of claims 10-12, wherein an excited singlet exciton energy level of the third compound is higher than an excited singlet exciton energy level of the first compound and the excited singlet exciton energy level of the first compound is higher than an excited singlet exciton energy level of the second compound.

14. The organic light emitting diode of any of claims 1-8, wherein the at least one emitting material layer includes a first emitting material layer disposed between the first and second electrodes and a second emitting material layer disposed between the first electrode and the first emitting material layer or between the first emitting material layer and the second electrode, and wherein the first emitting material layer includes the first compound and the second emitting material layer includes the second compound.

15. The organic light emitting diode of claim 14, wherein the first emitting material layer further includes a third compound and the second emitting material layer further includes a fourth compound.

16. The organic light emitting diode of claim 15, wherein an excited triplet exciton energy level of the third compound is higher than an excited triplet exciton energy level of the first compound and the exited triplet exciton energy level of the first compound is higher than an excited triplet exciton energy level of the second compound.

17. The organic light emitting diode of claim 15 or 16, wherein an excited singlet exciton energy level of the third compound is higher than an excited singlet exciton energy level of the first compound and the excited singlet exciton energy level of the first compound is higher than an excited singlet exciton energy level of the second compound.

18. The organic light emitting diode of any of claims 15-17, wherein an excited singlet energy level of the fourth compound is higher than an excited singlet energy level of the second compound.

19. The organic light emitting diode of any of claims 14-18, wherein the at least one emitting material layer further includes a third emitting material layer disposed oppositely to the second emitting material layer with respect to the first emitting material layer.

20. The organic light emitting diode of claim 19, wherein the third emitting material layer includes a fifth compound and a sixth compound, and wherein the fifth compound includes the organic compound having the structure of Formula 7.

21. The organic light emitting diode of ant of claims 1-8, wherein the emissive layer includes a first emitting part disposed between the first and second electrodes, a second emitting part disposed between the first emitting part and the second electrode and a charge generation layer disposed between the first and second emitting parts, and wherein at least one of the first emitting part and the second emitting part includes the at least one emitting material layer.

22. The organic light emitting diode of claim 21, wherein the first emitting part includes the at least one emitting material layer, and the second emitting part emits at least one of red light and green light.

23. The organic light emitting diode of claim 21 or 22, wherein the emissive layer further includes a third emitting part disposed between the second emitting part and the second electrode and a second charge generation layer disposed between the second and third emitting part, and wherein at least one of the first emitting part and the third emitting part includes the at least one emitting material layer.

24. An organic light emitting device, including: a substrate; and the organic light emitting diode according to any preceding claim and disposed over the substrate.

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