Effect of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline outcoupling layer on electroluminescent performances in top-emitting organic light-emitting devices

被引：20

作者：

Chen, Shufen ^{[1
]}

Xie, Wenfa ^{[2
]}

Meng, Yanlong ^{[2
]}

Chen, Ping ^{[2
]}

Zhao, Yi ^{[2
]}

Liu, Shiyong ^{[2
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Inst Adv Mat, Jiangsu Key Lab Organ Elect & Informat Displays, Nanjing 210003, Peoples R China

[2] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 05期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2885175

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The organic compound, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) is used as a light outcoupling layer in top-emitting organic light-emitting devices with tris(8-hydroxyquinoline) aluminum emission layer. It is found that, in addition to the improvement of electroluminescent (EL) intensity and luminous efficiency with a factor of 1.6, the BCP capping layer causes a blueshift of EL spectra and a larger full width at half maximum (FWHM). A larger FWHM at the BCP capping layer of 50 nm is attributed to the reduction of cathode reflectivity. In the meantime, the blueshift of EL spectra is caused by the increase of the reflective phase shift of the cathode when a thicker BCP layer is deposited. Moreover, our calculation demonstrates that the best EL coincides with a maximum magnification coefficient. (C) 2008 American Institute of Physics.

引用

页数：6

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