为了分析不同阴极耦合层对顶发射白光 OLED 器件光电性能的影响，数值计算了半透明阴极组成的多层膜系(ETL/EIL/Mg：Ag/折射率匹配层)的透过率和损耗；同时，采用共阴极结构设计制备了顶发射白光 OLED器件，并对不同折射率匹配层制备的顶发射白光 OLED器件的光电特性进行了研究。结果表明：采用相同厚度 LiF 和Al2 O3薄膜作为阴极耦合层时，多层膜系光学透过率和损耗曲线存在较大差异；在20 mA/cm2电流密度下，随着观测角度的增大，采用LiF＋Al2 O3双层折射率匹配层制备的器件电致发光谱峰位发生蓝移，但在整个视角内，器件的色坐标均稳定在白光等能点附近，这表明顶发射白光器件的色坐标可以通过折射率匹配层调节，使得器件在较大视角范围均能实现白光发射。
In order to analyse the effect of different outcouping layers on optical and electrical proper-ties of top-emitting organic white light emitting devices,in experiment,the transmittance and loss (absorption and reflection)of ETL/EIL/Mg∶Ag/matching layers were numerically calculated.At the same time,some top organic white light emitting devices with common cathode configurations were fabricated,and the optical and electrical properties of OLED devices prepared with different re-fractive index matching layers were analyzed.The experimental results showed that there were biggish difference in optical transmittance and loss of ETL/EIL/Mg∶Ag/matching layers with same thick-ness LiF and Al2 O3 .At the current density of 20 mA/cm2 ,according to the change of viewing angle from 0°to 60°,the electroluminescence emission spectra of OLED devices prepared with dual index matching layers occured to blue shift,but throughout the viewing angle from 0°to 60°,the color coor-dination always stayed close to 0.33,which indicated that the color coordinates of top-emitting white light devices can be adj usted by different refractive index matching layer to achieve white light emis-sion at large viewing angle.
参考文献
| [1] | 马颖;韩薇;张方辉;袁桃利;刘丁涵;蒋谦.发光层混合掺杂的白光OLED器件[J].液晶与显示,2011(1):40-43. |
| [2] | Tang C W;Vanslyke S A.Organic electroluminescent diodes[J].Applied Physics Letters,198751(12):913-915. |
| [3] | White organic light-emitting diodes with fluorescent tube efficiency[J].Nature,2009TN.7244(TN.7244):234-238. |
| [4] | Jonghee Lee;Jeong-Ik Lee;Hye Yong Chu.Efficient and color stable phosphorescent white organic light-emitting devices based on an ultra wide band-gap host[J].Synthetic Metals,200911(11):991-994. |
| [5] | You H;Dai YF;Zhang ZQ;Ma DG.Improved performances of organic light-emitting diodes with metal oxide as anode buffer[J].Journal of Applied Physics,20072(2):26105-1-26105-3-0. |
| [6] | 熊志勇;李宏建;王俊西;周子游;袁明;李雪勇.可弯曲式微腔有机电致发光器件的光学特性[J].发光学报,2009(3):337-343. |
| [7] | Sun Y;Giebink NC;Kanno H;Ma B;Thompson ME;Forrest SR.Management of singlet and triplet excitons for efficient white organic light-emitting devices.[J].Nature,20067086(7086):908-912. |
| [8] | 廖亚琴;陈红;刘星元.PrF3阳极缓冲层对OLED器件性能的影响[J].发光学报,2011(9):929-933. |
| [9] | 张春玉;陆景彬;郭树旭;郜峰利;王洪杰;曹军胜.微腔有机电玫发光器件的谐振腔反射镜性能[J].发光学报,2010(4):493-497. |
| [10] | 李志贤;张方辉;赵彦钊;王秀峰.LiF作为电子注入层对OLEDs器件性能的影响[J].液晶与显示,2008(1):52-57. |
| [11] | 陈淑芬;邵茗;郭旭;钱妍;石乃恩;解令海;杨洋;黄维.基于ZnS增透膜的顶发射白光有机发光二极管[J].物理学报,2012(8):432-439. |
| [12] | Huajun Peng;Jiaxin Sun;Xiuling Zhu;Xiaoming Yu;Man Wong;Hoi-Sing Kwok.High-efficiency microcavity top-emitting organic light-emitting diodes using silver anode[J].Applied physics letters,20067(7):073517-1-073517-3-0. |
| [13] | Cho, H;Yun, C;Park, JW;Yoo, S.Highly flexible organic light-emitting diodes based on ZnS/Ag/WO3 multilayer transparent electrodes[J].Organic electronics,20096(6):1163-1169. |
| [14] | Freitag, P.;Reineke, S.;Olthof, S.;Furno, M.;Lüssem, B.;Leo, K..White top-emitting organic light-emitting diodes with forward directed emission and high color quality[J].Organic electronics,201010(10):1676-1682. |
| [15] | Sang-Hyun Eom;Ying Zheng;Edward Wrzesniewski;Jaewon Lee;Neetu Chopra;Franky So;Jiangeng Xue.White phosphorescent organic light-emitting devices with dual triple-doped emissive layers[J].Applied physics letters,200915(15):153303-1-153303-3-0. |
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