Author:
Liu Bai-Quan ,Lan Lin-Feng ,Zou Jian-Hua ,Peng Jun-Biao , ,
Abstract
Highly efficient organic light-emitting diode is fabricated with a novel double hole injection layer consisting of MeO-TPD/CuPc. We observe that the insertion of such a double hole injection layer leads to a striking enhancement in the electrical property:higher luminance, power efficiency and lower driving voltage. It has the configuration of ITO/MeO-TPD (15 nm)/CuPc(15 nm)/NPB(15 nm)/Alq3 (50 nm)/LiF(1 nm)/Al(120 nm). Its turn-on voltage is 3.2 V, which is 2, 0.3 and 0.1 V lower than those of the device without hole injection layer (device A) and the devices using MeO-TPD (device B), CuPc (device C) as hole injection layer, respctively. The highest luminance of the novel device reaches 23893 cd/m2 at a drving voltage of 10 V. The maximum power efficiency of the novel decive is 1.91 lm/W, which is 43% (1.34 lm/W), 22% (1.57 lm/W) and 7% (1.79 lm/W) higher than those of devices A, B and C, respectively. The improvement is ascribed to its high hole injection and transport ability. The results are verified by using the J-V curves of "hole-only" devices.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Reference20 articles.
1. Tang C W, Vanslyke S A 1987 Appl. Phys. Lett. 51 913
2. Zou J H, Tao H, Wu H B, Peng J B 2009 Acta Phys. Sin. 58 1224 (in Chinese) [邹建华, 陶洪, 吴宏滨, 彭俊彪 2009 物理学报 58 1224]
3. Zou J H, Lan L F, Xu R X, Yang W, Peng J B 2010 Acta Phys. Sin. 59 1275 (in Chinese) [邹建华, 兰林锋, 徐瑞霞, 杨伟, 彭俊彪 2010 物理学报 59 1275]
4. Li C, Peng J B, Zeng W J 2009 Acta Phys. Sin. 58 1992 (in Chinese) [李春, 彭俊彪, 曾文进 2009 物理学报 58 1992]
5. Zou J H, Liu J, Wu H B, Yang W, Peng J B, Cao Y 2009 Org. Electron. 10 843
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