The Investigation on Color Purity of Blue Organic Light-Emitting Diodes (BOLED) by Hole-Blocking Layer

被引：2

作者：

Chen, Kan-Lin ^{[1
]}

Huang, Chien-Jung ^{[2
]}

Chen, Wen-Ray ^{[3
]}

Kang, Chih-Chieh ^{[4
]}

Lan, Wen-How ^{[5
]}

Lee, Yu-Chen ^{[2
]}

机构：

[1] Fortune Inst Technol, Dept Elect Engn, Kaohsiung 83160, Taiwan

[2] Natl Univ Kaohsiung, Dept Appl Phys, Kaohsiung 81148, Taiwan

[3] Natl Formosa Univ, Dept Elect Engn, Huwei 63201, Yunlin, Taiwan

[4] Southern Taiwan Univ Sci & Technol, Dept Electroopt Engn, Tainan 71005, Taiwan

[5] Natl Univ Kaohsiung, Dept Elect Engn, Kaohsiung 81148, Taiwan

来源：

INTERNATIONAL JOURNAL OF PHOTOENERGY | 2013年 / 2013卷

关键词：

ELECTRON BALANCE; EFFICIENCY; DEVICES;

D O I：

10.1155/2013/878537

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Organic light-emitting diodes (OLEDs) with triple hole-blocking layer (THBL) structure, which consist of 2,9-dimethyl-4,7-diphenyl- 1,10-phenanthroline (BCP), 4,4'-bis(2,2'diphenyl vinil)-1,1'-biphenyl (DPVBi), and (4,4'-N,N'-dicarbazole) biphenyl (CBP), have been fabricated. Regardless of applied voltage variation, the luminous efficiency of the OLEDs with THBL structure was increased by 41% as compared with the dual hole-blocking layer (DHBL) structure. The CIE coordinates of (0.157, 0.111) of device with THBL structure are close to pure blue emission than that of other devices of DHBL. There is a coordinate with the slight shift of +/-Delta(x,y) = (0.001, 0.008) for the device with THBL structure during the applied voltage of 6-9V. The results indicate that the excitons can be effectively confined in the emitting layer of device, leading to an enhancement of luminance efficiency and more stable coordinate.

引用

页数：6

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