Managing Charge and Exciton Transporting Behavior in White Organic Light-Emitting Devices for High Power Efficiency and Superior Color Stability
作者： Qi Wang , Iain W. H. Oswald , Xiaolong Yang , Guijiang Zhou , Huiping Jia
关键词: Materials science 、 High color 、 Optoelectronics 、 Exciton 、 Electrical efficiency 、 Triplet exciton 、 White light 、 Phosphorescence 、 Doping 、 Diode
摘要: An advanced device structure using doped blue dual emitting layers (EMLs) and an undoped orange EML is developed for achieving white organic light-emitting diodes. The optimized a single species both emission shows peak power efficiency of 60 lm W−1 high color stability over the entire operation process due to aligned energy levels facilitated charge transport. Quantitative analysis working mechanism performed provide explanation performance device. It found that exciton transporting behavior can be finely tuned between different regions, therefore spectrum are improved systematically.
sci-hub.se 参考文章(70)
M. A. Baldo, D. F. O'Brien, Y. You, A. Shoustikov, S. Sibley, M. E. Thompson, S. R. Forrest, Highly efficient phosphorescent emission from organic electroluminescent devices Nature. ,vol. 395, pp. 151- 154 ,(1998) , 10.1038/25954
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
Kun-Yi Lu, Ho-Hsiu Chou, Cheng-Han Hsieh, Yu-Han Ou Yang, Huei-Ru Tsai, Hsiu-Yun Tsai, Lun-Chia Hsu, Chien-Yu Chen, I-Chia Chen, Chien-Hong Cheng, Wide-range color tuning of iridium biscarbene complexes from blue to red by different N⁁N ligands: an alternative route for adjusting the emission colors. Advanced Materials. ,vol. 23, pp. 4933- 4937 ,(2011) , 10.1002/ADMA.201102886
Gianluca M. Farinola, Roberta Ragni, Electroluminescent materials for white organic light emitting diodes Chemical Society Reviews. ,vol. 40, pp. 3467- 3482 ,(2011) , 10.1039/C0CS00204F
G. Schwartz, M. Pfeiffer, S. Reineke, K. Walzer, K. Leo, Harvesting Triplet Excitons from Fluorescent Blue Emitters in White Organic Light‐Emitting Diodes Advanced Materials. ,vol. 19, pp. 3672- 3676 ,(2007) , 10.1002/ADMA.200700641
Qi Wang, Cheuk-Lam Ho, Yongbiao Zhao, Dongge Ma, Wai-Yeung Wong, Lixiang Wang, Reduced efficiency roll-off in highly efficient and color-stable hybrid WOLEDs: The influence of triplet transfer and charge-transport behavior on enhancing device performance Organic Electronics. ,vol. 11, pp. 238- 246 ,(2010) , 10.1016/J.ORGEL.2009.11.001
Min Cai, Teng Xiao, Emily Hellerich, Ying Chen, Ruth Shinar, Joseph Shinar, High-Efficiency Solution-Processed Small Molecule Electrophosphorescent Organic Light-Emitting Diodes Advanced Materials. ,vol. 23, pp. 3590- 3596 ,(2011) , 10.1002/ADMA.201101154
N. C. Giebink, S. R. Forrest, Quantum efficiency roll-off at high brightness in fluorescent and phosphorescent organic light emitting diodes Physical Review B. ,vol. 77, pp. 235215- ,(2008) , 10.1103/PHYSREVB.77.235215
Yuichiro Kawamura, Kenichi Goushi, Jason Brooks, Julie J. Brown, Hiroyuki Sasabe, Chihaya Adachi, 100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films Applied Physics Letters. ,vol. 86, pp. 071104- ,(2005) , 10.1063/1.1862777
M.-H. Tsai, Y.-H. Hong, C.-H. Chang, H.-C. Su, C.-C. Wu, A. Matoliukstyte, J. Simokaitiene, S. Grigalevicius, J. V. Grazulevicius, C.-P. Hsu, 3-(9-Carbazolyl)carbazoles and 3,6-Di(9-carbazolyl)carbazoles as Effective Host Materials for Efficient Blue Organic Electrophosphorescence** Advanced Materials. ,vol. 19, pp. 862- 866 ,(2007) , 10.1002/ADMA.200600822