High-efficiency white organic light emitting devices with three separate phosphorescent emission layers
作者： Yiru Sun , Stephen R. Forrest
DOI: 10.1063/1.2827178
关键词:
摘要: We demonstrate high-efficiency white organic light emitting devices (WOLEDs) employing three adjacent phosphorescent emission layers (3-EMLs). The metal-organic dopants for red, green, and blue emissions are each doped in separate hosts, allowing optimization of the dopant-host material combinations. This structure distributes exciton generation region across hosts to form a stepped progression highest occupied lowest unoccupied molecular orbitals. 3-EML WOLED has color rendering index 81 peak forward-viewing external quantum (EQE) power efficiencies (PE) (16.6±0.8)% 32±1lm∕W, respectively, corresponding total EQE=(28±1)% PE=54±3lm∕W. When an n-doped electron transporting layer is used, PE peaks at 64±3lm∕W, rolls off 34±2lm∕W 1000cd∕m2.
scitation.org
harvard.edu
aip.org 
sci-hub.se 参考文章(18)
Yiru Sun, Noel C. Giebink, Hiroshi Kanno, Biwu Ma, Mark E. Thompson, Stephen R. Forrest, Management of singlet and triplet excitons for efficient white organic light-emitting devices Nature. ,vol. 440, pp. 908- 912 ,(2006) , 10.1038/NATURE04645
M.S. Kim, J.T. Lim, C.H. Jeong, J.H. Lee, G.Y. Yeom, White organic light-emitting diodes from three emitter layers Thin Solid Films. ,vol. 515, pp. 891- 895 ,(2006) , 10.1016/J.TSF.2006.07.051
V. Bulović, V. B. Khalfin, G. Gu, P. E. Burrows, D. Z. Garbuzov, S. R. Forrest, Weak microcavity effects in organic light-emitting devices Physical Review B. ,vol. 58, pp. 3730- 3740 ,(1998) , 10.1103/PHYSREVB.58.3730
H. Kanno, R. J. Holmes, Y. Sun, S. Kena-Cohen, S. R. Forrest, White Stacked Electrophosphorescent Organic Light‐Emitting Devices Employing MoO3 as a Charge‐Generation Layer Advanced Materials. ,vol. 18, pp. 339- 342 ,(2006) , 10.1002/ADMA.200501915
Gufeng He, Martin Pfeiffer, Karl Leo, Michael Hofmann, Jan Birnstock, Robert Pudzich, Josef Salbeck, High-efficiency and low-voltage p‐i‐n electrophosphorescent organic light-emitting diodes with double-emission layers Applied Physics Letters. ,vol. 85, pp. 3911- 3913 ,(2004) , 10.1063/1.1812378
B. W. D'Andrade, S. R. Forrest, White Organic Light‐Emitting Devices for Solid‐State Lighting Advanced Materials. ,vol. 16, pp. 1585- 1595 ,(2004) , 10.1002/ADMA.200400684
I. G. Hill, A. Kahn, Organic semiconductor heterointerfaces containing bathocuproine Journal of Applied Physics. ,vol. 86, pp. 4515- 4519 ,(1999) , 10.1063/1.371395
Ji Hoon Seo, Ji Hyun Seo, Jung Hyun Park, Young Kwan Kim, Jun Ho Kim, Gun Woo Hyung, Kum Hee Lee, Seung Soo Yoon, Highly efficient white organic light-emitting diodes using two emitting materials for three primary colors (red, green, and blue) Applied Physics Letters. ,vol. 90, pp. 203507- ,(2007) , 10.1063/1.2740191
Gang Cheng, Yingfang Zhang, Yi Zhao, Yuanyuan Lin, Chunyan Ruan, Shiyong Liu, Teng Fei, Yuguang Ma, Yanxiang Cheng, White organic light-emitting devices with a phosphorescent multiple emissive layer Applied Physics Letters. ,vol. 89, pp. 043504- ,(2006) , 10.1063/1.2227645
X. Zhou, D. S. Qin, M. Pfeiffer, J. Blochwitz-Nimoth, A. Werner, J. Drechsel, B. Maennig, K. Leo, M. Bold, P. Erk, H. Hartmann, High-efficiency electrophosphorescent organic light-emitting diodes with double light-emitting layers Applied Physics Letters. ,vol. 81, pp. 4070- 4072 ,(2002) , 10.1063/1.1522495