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1. 陕西科技大学 电气与信息工程学院,陕西 西安,710021
2. 陕西科技大学 材料科学与工程学院,陕西 西安,710021
纸质出版日期:2017-8-5,
收稿日期:2017-4-16,
修回日期:2017-5-18,
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袁桃利, 王秀峰, 牟强等. 基于Alq<sub>3</sub>掺杂Bphen电子传输层的有机发光二极管[J]. 发光学报, 2017,38(8): 1069-1075
YUAN Tao-li, WANG Xiu-feng, MU Qiang etc. Organic Light Emitting Diode Based on Bphen Electron Transport Layer Doped with Alq<sub>3</sub>[J]. Chinese Journal of Luminescence, 2017,38(8): 1069-1075
袁桃利, 王秀峰, 牟强等. 基于Alq<sub>3</sub>掺杂Bphen电子传输层的有机发光二极管[J]. 发光学报, 2017,38(8): 1069-1075 DOI: 10.3788/fgxb20173808.1069.
YUAN Tao-li, WANG Xiu-feng, MU Qiang etc. Organic Light Emitting Diode Based on Bphen Electron Transport Layer Doped with Alq<sub>3</sub>[J]. Chinese Journal of Luminescence, 2017,38(8): 1069-1075 DOI: 10.3788/fgxb20173808.1069.
制备了结构为ITO/MoO
3
(30 nm)/NPB(40 nm)/TCTA(10 nm)/CBP:R-4B(8%)(30 nm)/电子传输层(40 nm)/LiF(1 nm)/Al(150 nm)的器件,其中R-4B为红色磷光染料,电子传输层分别采用Alq
3
、Bphen:Alq
3
(
x
%)和Bphen,对3种不同电子传输层器件的发光性能进行了研究。结果表明:Bphen:Alq
3
(
x
%)作为电子传输层的器件与Alq
3
或Bphen作为电子传输层的器件相比,亮度提高了约3.5倍,电流效率提高了1.1~2.5倍,效率滚降变得平缓。采用Bphen:Alq
3
作为电子传输层,不仅减小了电子在LUMO能级传输时的跳跃传输距离,而且在一定程度上抑制了Bphen的结晶,使器件的电子传输能力和效率滚降性能得到改善。
Red phosphorescent organic light emitting diodes were fabricated using R-4B phosphorescent dye. The device structure was ITO/MoO
3
(30 nm)/NPB(40 nm)/TCTA (10 nm)/CBP:R-4B(8%) (30 nm)/electron transport layer (40 nm)/LiF(1 nm)/Al(150 nm). The electron transport layers were Alq
3
Bphen:Alq
3
(
x
%) and Bphen
respectively. The electroluminescent properties were studied by using different electron transport layers. The results show that the brightness and the current efficiency of the device using Bphen:Alq
3
(
x
%) as electron transport layer is 3.5 times and 1.1-2.5 times respectively stronger than that of using Alq
3
or Bphen as electron transport layer. Meanwhile
the efficiency roll-off of device became smooth. Using Bphen:Alq
3
as electron transport layer can not only reduce the hopping distance when electrons transmit between LUMO levels
but also restrain the crystallization of Bphen
and as a result
the electron conductivity and efficiency roll-off of the device are improved.
掺杂电子传输层有机发光二极管
dopingelectron transport layerorganic light emitting diode
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杜帅, 张方辉. 基于Bphen:BCP:Cs2CO3作为电子传输层的OLED性能研究[J]. 光电子激光, 2017, 28(1):19-24. DU S, ZHANG F H. Impact of Bphen:BCP:Cs2CO3as electron transport layer on the performance of OLEDs[J]. J. Optoelectron. Laser, 2017, 28(1):19-24. (in Chinese).
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