The performance enhancement in organic light-emitting diode using a semicrystalline composite for hole injection
Cao Jun-Song(曹峻松)a), Guan Min(关敏)a)†, Cao Guo-Hua(曹国华)a),Zeng Yi-Ping(曾一平)a)‡, Li Jin-Min(李晋闽)a), and Qin Da-Shan(秦大山)b)
aNovel Materials Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; bInstitute of Polymer Science and Engineering, Hebei University of Technology, Tianjin 300130, China
Abstract A semicrystalline composite, 3, 4, 9, 10 perylenetetracarboxylic dianhydride (PTCDA) doped N,N'-di(1-naphthyl)-N,N'-diphenylbenzidine (NPB), has been fabricated and characterized. An organic light-emitting diode using such a composite in hole injection exhibits the improved performance as compared with the reference device using neat NPB in hole injection. For example, at a luminance of 2000 cd/m$^{2}$, the former device gives a current efficiency of 2.0cd/A, higher than 1.6cd/A obtained from the latter device. Furthermore, the semicrystalline composite has been shown thermally to be more stable than the neat NPB thin film, which is useful for making organic light emitting diodes with a prolonged lifetime.
Received: 03 January 2008
Revised: 24 January 2008
Accepted manuscript online:
(Methods of materials synthesis and materials processing)
Fund: Project supported by the National
Natural Science Foundation of China
(Grant No 60606025).
Cite this article:
Cao Jun-Song(曹峻松), Guan Min(关敏), Cao Guo-Hua(曹国华), Zeng Yi-Ping(曾一平), Li Jin-Min(李晋闽), and Qin Da-Shan(秦大山) The performance enhancement in organic light-emitting diode using a semicrystalline composite for hole injection 2008 Chin. Phys. B 17 2725
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