OLED for improving efficiency stability based on anode modification layer
An anode modification layer and stability technology, applied in the field of organic electroluminescent devices, can solve the problems of lowering the energy barrier of ITO and NPB, increasing the manufacturing cost and process difficulty, and unstable device efficiency, so as to improve the unstable efficiency and improve the efficiency of the device. Efficiency stability, good feasibility and reproducibility
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[0022] Example 1 (comparative example):
[0023] An organic electroluminescence device includes an anode, a hole injection layer, a hole transport layer, a light-emitting unit, an electron transport layer, an electron injection layer and a cathode arranged in sequence. The structure of the organic electroluminescent device of this embodiment is Glass (1100nm) / ITO (140nm) / NPB (40nm) / TCTA (10nm) / TCTA: Ir(ppy) 3 (10wt%,10nm) / TPBi(40nm) / Cs 2 CO 3 (1nm) / Al(120nm). The lighting voltage of the device in this embodiment is 2.75V, and the maximum brightness is 46943cd / m. 2 , The maximum power efficiency is 62.3lm / W, and the current density is 20mA / cm 2 The current efficiency is 65.7cd / A.
Example Embodiment
[0024] Example 2:
[0025] An organic electroluminescence device includes an anode, a hole injection layer, a hole transport layer, a light-emitting unit, an electron transport layer, an electron injection layer and a cathode arranged in sequence. The structure of the organic electroluminescent device of this embodiment is Glass (1100nm) / ITO (140nm) / MoO 3 (1nm) / NPB(40nm) / TCTA(10nm) / TCTA:Ir(ppy) 3 (10wt%,10nm) / TPBi(40nm) / Cs 2 CO 3 (1nm) / Al(120nm). The lighting voltage of the device in this embodiment is 2.74V, and the maximum brightness is 75 768cd / m. 2 , The maximum power efficiency is 67.2lm / W, and the current density is 20mA / cm 2 The current efficiency is 70cd / A.
Example Embodiment
[0026] Example 3:
[0027] An organic electroluminescence device includes an anode, a hole injection layer, a hole transport layer, a light-emitting unit, an electron transport layer, an electron injection layer and a cathode arranged in sequence. The structure of the organic electroluminescent device of this embodiment is Glass (1100nm) / ITO (140nm) / MoO 3 (5nm) / NPB(40nm) / TCTA(10nm) / TCTA:Ir(ppy) 3 (10wt%,10nm) / TPBi(40nm) / Cs 2 CO 3 (1nm) / Al(120nm). The lighting voltage of the device of this embodiment is 2.74V, and the maximum brightness is 80 744cd / m 2 , The maximum power efficiency is 69.5lm / W, and the current density is 20mA / cm 2 The current efficiency is 66.1cd / A.
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