可弯曲式有机电致发光器件的出光率

熊志勇; 李宏建; 王俊西; 袁明; 周子游; 李雪勇

doi:doi:10.3788/aos20092910.2885

光学学报, 2009, 29 (10): 2885, 网络出版: 2009-10-19

可弯曲式有机电致发光器件的出光率

Light Out-Coupling Efficiency in Flexible Organic Light-Emitting Devices

论文大纲

熊志勇 ^1,*李宏建 ^1,2王俊西 ¹袁明 ¹周子游 ¹李雪勇 ^1,2

作者单位

¹ 中南大学物理科学与技术学院,湖南长沙 410083

² 中南大学材料科学与工程学院,湖南长沙 410083

摘要

基于几何光学模型及其原理,推导出在不同弯曲情况下可弯曲式有机电致发光器件的出光率表达式,分析了器件出光率受基板曲率、厚度及有机层折射率的影响,并与平整有机电致发光器件的出光情况作了比较。结果表明：当器件向外弯曲时,出光率随着基板曲率与基板厚度的增大而增大,随着有机层折射率的增大而减小;当器件向内弯曲时,出光率随着基板曲率与基板厚度的增大而减小,随着有机层折射率的增大而减小。对于平整器件,其出光率随有机层折射率的增大而减小。

Abstract

Based on the geometrical optics model,the expression of flexible organic light emitting devices (FOLED)′s out-coupling efficiency was presented. The influence of substrate curvature and its thickness,and organic layer′s refractive index on the performance of the FOLED′s out-coupling efficiency was studied,and the variation of out-coupling efficiency between FOLED and plane organic light emitting display (OLED) are contrasted as well. The result shows that:the out-coupling efficiency is enhanced with increased substrate curvature and its thickness,but is reduced with increased organic layer′s refractive index for outcurved substrate. The out-coupling efficiency is reduced with increased substrate curvature and thickness,and is also reduced with increased organic layer′s refractive index for incurvated substrate. The out-coupling efficiency of OLED is reduced with increased organic layer′s refractive index.

参考文献

[1] G. Gustafsson,Y. Cao,G. M. Treacy et al.. Flexible light-emitting diodes made from soluble conducting polymers[J]. Nature,1992,357(6378):477-479

[2] C. C. Wu,S. D. Theiss,G. Gu et al.. Integration of organic LEDs and amorphous Si TFT’s onto flexible and lightweight metal foil substrates[J]. IEEE Elec. Dev. Lett.,1997,18(1):609-611

[3] Z. Xie,L. S. Hung,F. Zhu. A flexible top-emitting organic light-emitting diode on steel foil[J]. Chem. Phys. Lett.,2003,381(5-6):691-696

[4] C. Charton,N. Schiller,M. Fahland et al.. Development of high barrier films on flexible polymer substrates[J]. Thin Solid Films,2006,502(1-2):99-103

[5] F. Templier,B. Aventurier,P. Demars et al.. Fabrication of high performance low temperature poly-silicon backplanes on metal foil for flexible active-matrix organic light emission diode displays[J]. Thin Solid Films,2007,515(19):7428-7432

[6] 曹进,张晓波,委福祥等. 新型高色纯度弱电流猝灭性蓝色有机发光器件[J]. 光学学报,2006,26(2):275-278

Cao Jin,Zhang Xiaobo,Wei Fuxiang et al.. Novel blue organic light emitting diode with highly saturated color and weak current-lnduced quenching[J]. Acta Optica Sinina,2006,26(2):275-278

[7] 娄双玲,于军胜,黎威志等. 基于新型空穴传输材料的有机电致发光器件的研究[J]. 光学学报,2007,27(8):1455-1459

Lou Shuangling,Yu Junsheng,Li Weizhi et al.. Organic light-emitting devices based on novel hole transport layer[J]. Acta Optica Sinina,2007,27(8):1455-1459

[8] 锁钒,于军胜,邓静等. PS-TPD空穴传输层的高亮度绿光有机电致发光器件的研究[J]. 光学学报,2007,27(11):2021-2026

Suo Fan,Yu Junsheng,Deng Jing et al.. Study on high-brightness green organic light-emitting devices using PS-TPD as hole transporting layer[J]. Acta Optica Sinina,2007,27(11):2021-2026

[9] N. C. Greenham,R. H. Friend,D. D. C. Bradley. Angular dependence of the emission from a conjugated polymer light-emitting diode:Implications for efficiency calculations[J]. Adv. Mater.,1994,6(6):491-494

[10] M. H. Lu,J. C. Sturm. Optimization of external coupling and light emission in organic light-emitting devices:modeling and experiment[J]. J. Appl. Phys.,2002,91(2):595-604

[11] B. Krummacher,M. K. Mathai,V. E. Choong et al.. Influence of charge balance and microcavity effects on resultant efficiency of organic-light emitting devices[J]. Organic Electronics,2006,7:313-318

[12] T. Yamasaki,K. Sumioka,T. Tsutsui. Organic light-emitting device with an ordered monolayer of silica microspheres as a scattering mudium[J]. Appl. Phys. Lett.,2000,76(10):1243-1245

[13] S. Moller,S. R. Forrest. Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays[J]. Appl. Phys. Lett.,2002,91(5):3324-3327

[14] C. F. Madigan,M. H. Lu,J. C. Sturm. Improvement of output coupling efficiency of organic light-emitting diodes by backside substrate modification[J]. Appl. Phys. Lett.,2000,76(13):1650-1652

[15] H. J. Peng,Y. L. Ho,X. J. Yu et al.. Couping efficiency enhancement in organic light-emitting devices using microlens array-theory and experiment[J]. J. Display Technology,2005,1(2):278-282

熊志勇, 李宏建, 王俊西, 袁明, 周子游, 李雪勇. 可弯曲式有机电致发光器件的出光率[J]. 光学学报, 2009, 29(10): 2885. Xiong Zhiyong, Li Hongjian, Wang Junxi, Yuan Ming, Zhou Ziyou, Li Xueyong. Light Out-Coupling Efficiency in Flexible Organic Light-Emitting Devices[J]. Acta Optica Sinica, 2009, 29(10): 2885.

可弯曲式有机电致发光器件的出光率

关于本站 Cookie 的使用提示

全站搜索

可弯曲式有机电致发光器件的出光率

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索