Inverted organic light emission diode, preparation method thereof, display screen and terminal
An electroluminescence device and a display screen technology, which are applied in the field of electric light sources, and can solve problems such as unclear content and low contrast of display devices
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[0045] Correspondingly, the method for preparing an inverted organic electroluminescent device in the above embodiment can be as follows: image 3 So show. The technological process preparation, see also Figure 1~2 , its preparation method comprises the following steps:
[0046] S01. Provide the substrate 1;
[0047] S02. Prepare the cathode layer 2: in the vacuum coating system, vapor-deposit the metal reflective layer material on the surface of the substrate 1 to form a film to form the metal reflective layer 21;
[0048] Oxidizing the outer surface of the metal reflective layer 21 to form a diffuse reflective layer 22 of metal oxide;
[0049] In the vacuum coating system, the semi-transparent metal layer material is evaporated on the outer surface of the diffuse reflection layer 22 to form a semi-transparent metal layer 23, and the metal reflection layer 21, the diffuse reflection layer 22 and the semi-transparent metal layer 23 form the cathode layer 2;
[0050] S03. ...
Embodiment 1
[0069] An inverted organic electroluminescent device with a cathode having low reflectivity and an anode as a light-emitting surface, the structure of which is: glass substrate / Ag(70nm) / Ag 2 O(10nm) / Ag(7nm) / Electron injection layer (LiF,1nm) / Electron transport layer (Bphen,30nm) / Emitting layer (Ir(ppy) 3 : TPBi (10%), 10nm) / hole transport layer (NPB, 40nm) / hole injection layer (ZnPc, 15nm) / Ag (18nm). Among them, Ag(70nm) / Ag 2 O(10nm) / Ag(7nm) constitutes the cathode.
[0070] Its preparation method is as follows:
[0071] (1) Clean the glass substrate with a cleaning agent, then ultrasonically clean it with distilled water and acetone in sequence;
[0072] (2) At a vacuum of 10 -3 In the vacuum coating system of Pa, the cathode is prepared on the substrate; specifically, the vacuum degree of the cavity is evacuated to 1.0×10 with a mechanical pump and a molecular pump. -3 Pa, the material is Ag, the evaporation rate is between 0.2nm / s, and the thickness is 70nm, and the me...
Embodiment 2
[0077] An inverted organic electroluminescent device with a cathode having low reflectivity and an anode as a light-emitting surface, the structure of which is: glass substrate / Ag(500nm) / Ag 2 O(100nm) / Al(7nm) / electron injection layer (LiF,1nm) / electron transport layer (Alq 3 ,60nm) / emissive layer Ir(MDQ)2(acac):NPB(8%)(10nm) / hole transport layer (TPD,40nm) / hole injection layer (CuPc,20nm) / Au(35nm). Among them, Ag(500nm) / Ag 2 O(100nm) / Al(7nm) constitutes the cathode.
[0078] Its preparation method is as follows:
[0079] (1) Clean the glass substrate with a cleaning agent, then ultrasonically clean it with distilled water and acetone in sequence;
[0080] (2) At a vacuum of 10 -3 In the vacuum coating system of Pa, the cathode is prepared on the substrate; specifically, the vacuum degree of the cavity is evacuated to 1.0×10 with a mechanical pump and a molecular pump. -3 Pa, the material is Ag, the evaporation rate is between 1nm / s, and the thickness is 500nm, and the met...
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