Organic electroluminescent device and preparation method thereof
An electroluminescent device and electroluminescent technology, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, and electrical components, etc., can solve the problems of reduced luminous efficiency of light-emitting devices, increased operating voltage and decreased stability of light-emitting devices, etc. Improve hole injection efficiency, reduce operating voltage, and increase the effect of logarithm
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[0032] The present invention also provides a method for preparing the above-mentioned organic electroluminescent device, the steps of which are:
[0033] a) Pretreatment of anode conductive substrate
[0034] Use ITO glass (also known as indium tin oxide transparent conductive glass) as the anode conductive substrate, and wash it with detergent, deionized water, acetone and ethanol successively. All are cleaned with an ultrasonic cleaning machine. Each washing takes 5 minutes. , Stop for 5 minutes, repeat the method 3 times respectively, and then dry it in an oven for later use; the cleaned ITO glass needs to be surface activated to increase the oxygen content on the surface of the ITO glass and improve the ITO glass The work function of the surface; the thickness of ITO glass is 100~150nm;
[0035] b) Preparation of the first hole injection layer
[0036] Using N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (NPB), 4,4',4'' -Tris(carbazol-9-yl)triphenylamine (TCTA), 4...
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[0052] Example 1
[0053] Such as figure 1 As shown, this embodiment 1 provides an organic electroluminescent device, the organic electroluminescent device has a layered structure, and the organic electroluminescent device in turn includes an anode conductive substrate 101 and a first hole injection layer 102 , The first electron injection layer 103, the second hole injection layer 104, the hole transport layer 105, the green light emitting layer 106, the electron transport layer 107, the second electron injection layer 108, and the cathode layer 109.
[0054] The expression of the organic electroluminescent device is: ITO glass / MoO 3 :NPB(30:100) / Cs 2 CO 3 :Bphen(30:100) / MoO 3 :NPB(30:100) / NPB / Ir(ppy) 3 :TCTA(10:100) / Bphen / Cs 2 CO 3 :Bphen(30:100) / Ag, where the colon ":" means that the former is doped in the latter.
[0055] This embodiment 1 also provides a method for preparing the above-mentioned organic electroluminescent device, the steps of which are:
[0056] a) Pretreatment ...
Example Embodiment
[0074] Example 2
[0075] Such as figure 1 As shown, the present embodiment 2 provides an organic electroluminescent device, the organic electroluminescent device has a layered structure, and the organic electroluminescent device sequentially includes an anode conductive substrate 101 and a first hole injection layer 102 , The first electron injection layer 103, the second hole injection layer 104, the hole transport layer 105, the green light emitting layer 106, the electron transport layer 107, the second electron injection layer 108, and the cathode layer 109.
[0076] The expression of the organic electroluminescent device is: ITO glass / WO 3 :TCTA(25:100) / CsF:BCP(25:100) / WO 3 :TCTA(25:100) / TCTA / Ir(ppy) 2 (acac):mCP(2:100) / BCP / CsF:BCP(25:100) / Al, where the colon ":" means that the former is mixed in the latter.
[0077] This embodiment 2 also provides a method for preparing the above-mentioned organic electroluminescent device, and the steps are as follows:
[0078] a) Pretreatment...
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