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Organic light emitting device

A technology of organic light-emitting devices and light-emitting layers, which is applied in the fields of electrical solid-state devices, semiconductor devices, semiconductor/solid-state device manufacturing, etc., and can solve problems such as low recombination efficiency of electrons and holes, device failure, and unbalanced carrier injection

Inactive Publication Date: 2018-11-13
CHANGCHUN HYPERIONS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, traditional OLED display devices often have problems with luminous efficiency and service life. The main reasons are as follows: on the one hand, it depends on the luminous performance of the organic light-emitting materials used, and the matching degree between the composite materials of each layer; on the other hand, it depends on Exciton utilization, due to the different transport speeds of holes and electrons in organic optoelectronic materials, conventional device structures are prone to the problem of unbalanced carrier injection, resulting in low recombination efficiency of electrons and holes and shifts in the recombination area, thus It leads to low luminous efficiency and low lifespan of organic electroluminescent devices; on the other hand, most of the packaging methods of organic electroluminescent devices are thin-film packaging. and oxygen in contact with the OLED display device
The upper cathode is often made of highly active metals, which are prone to device failure after contact with moisture and oxygen.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] Embodiment 1: the synthesis of compound 1-A1

[0108]

[0109] Synthesis of Intermediate A1-1

[0110] To 7-bromo-5H - A solution of pyrido[4,3-B]indole (45.2 g, 183 mmol) and iodobenzene (37.7 g, 185 mmol) in degassed toluene (1 L), and the mixture was heated at reflux for 2 hours. The reaction mixture was cooled to room temperature, diluted with toluene and filtered through celite. The filtrate was diluted with water and extracted with toluene, and the combined organic phases were evaporated under vacuum. The residue was filtered through silica gel and recrystallized. Intermediate A1-1 (47.2 g, 80% yield) was obtained.

[0111] Mass Spectrum m / z: 323.23 (calculated: 323.19). Theoretical element content (%)C 17 h 11 N 2 Br: C, 63.18; H, 3.43; Br, 24.72; N, 8.67 Measured element content (%): C, 63.19; H, 3.45; Br, 24.72; N, 8.64. The above results confirmed that the obtained product was the target product.

[0112] Synthesis of Intermediate B1-1

[0113] T...

Embodiment 2

[0121] Embodiment 2: the synthesis of compound 1-B2

[0122]

[0123] Synthesis of Intermediate A1-1

[0124] To 7-bromo-5H - A solution of pyrido[4,3-B]indole (45.2 g, 183 mmol) and iodobenzene (37.7 g, 185 mmol) in degassed toluene (1 L), and the mixture was heated at reflux for 2 hours. The reaction mixture was cooled to room temperature, diluted with toluene and filtered through celite. The filtrate was diluted with water and extracted with toluene, and the combined organic phases were evaporated under vacuum. The residue was filtered through silica gel and recrystallized. Intermediate A1-1 (47.2 g, 80% yield) was obtained.

[0125] Mass Spectrum m / z: 323.23 (calculated: 323.19). Theoretical element content (%)C 17 h 11 N 2 Br: C, 63.18; H, 3.43; Br, 24.72; N, 8.67 Measured element content (%): C, 63.19; H, 3.45; Br, 24.72; N, 8.64. The above results confirmed that the obtained product was the target product.

[0126] Synthesis of Intermediate B2-1

[0127] T...

Embodiment 3

[0135] Embodiment 3: the synthesis of compound 2-A1

[0136]

[0137] Synthesis of intermediate a1-1

[0138] Take 3,5-dichlorobiphenyl (9.4g, 42.4mmol) into a three-necked flask, add 100mL of THF, protect it under nitrogen, stir at -78°C for 30 minutes, then add 21mL of n-butyllithium (2.5M), and react 1 After 1 hour, add 14 g of triisopropyl borate, react at low temperature for 1 hour, and gradually return to room temperature. In the post-treatment process, 2M hydrochloric acid was added to the system to make the pH of the solution 4-5, and the liquid separation was allowed to stand. The aqueous layer was extracted with ethyl acetate, the organic layers were combined, and spin-dried to obtain intermediate a1-1 (8.2g, yield 80%).

[0139] Mass Spectrum m / z: 242.16 (calculated: 242.09). Theoretical element content (%) C12H12B2O4: C, 59.60; H, 5.00; B, 8.94; O, 26.46 Measured element content (%): C, 59.61; H, 5.02; B, 8.94; O, 26.43. The above results confirmed that the ...

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Abstract

The invention provides an organic light emitting device, and relates to the technical field of organic photoelectricity. The device is of a double-layer electronic transmission device structure, comprises a nitrogen heterocyclic carbazole compound as a first electron transport layer and a triazine compound as a second electron transport layer. The nitrogen heterocyclic carbazole compound has highelectron mobility, the triazine compound with the specific fluorene group has high electron mobility, and the carrier transmission in the structure is balanced due to the addition of the fluorene. Byreasonably adjusting the matching of the two types of compounds in the device, the light emitting efficiency of the organic light emitting device is remarkably improved, and the driving voltage is obviously reduced, so that the organic light emitting device is an organic light emitting device with excellent performance and can be widely applied to the field of display.

Description

technical field [0001] The invention relates to the field of organic photoelectric technology, in particular to an organic light emitting device. Background technique [0002] In recent years, Organic Light Emitting Diode (OLED: Organic Light Emitting Diode) as a new and promising display technology has gradually entered people's field of vision. Compared with traditional display technologies, it has significant advantages in voltage characteristics, luminous brightness, luminous efficiency, device weight, response speed, and viewing angle, and has broad market prospects due to its low-cost potential. [0003] Typically, OLEDs have a layered or laminated structure. For example, a typical OLED has an anode / organic light-emitting layer / cathode multilayer structure. OLEDs can also have various other structures such as anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / cathode multilayer structure or anode / hol...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/10H10K85/141H10K50/166
Inventor 刘喜庆蔡辉
Owner CHANGCHUN HYPERIONS TECH CO LTD
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