Recombination region improvement for reduced efficiency roll-off in phosphorescent OLEDs with dual emissive layers
文献类型：期刊论文
| 作者 | Ma, Zhu1; Zhou, Shunliang1; Hu, Song2; Yu, Junsheng1 |
| 刊名 | Journal of Luminescence
 |
| 出版日期 | 2014 |
| 卷号 | 154页码:376-380 |
| ISSN号 | 00222313 |
| 通讯作者 | Yu, J. (jsyu@uestc.edu.cn) |
| 中文摘要 | High-performance phosphorescent organic light-emitting diodes (PhOLEDs) by using dual-emissive-layer (DEL) structure to reduce efficiency roll-off were fabricated. The DEL was comprised of a hole-transport-type host of N, N′-bis(naphthalen-1-yl)-N, N′-bis(phenyl)-benzidine (NPB) and a bipolar host of 4,4′-bis(carbazol-9-yl)biphenyl (CBP), which were both doped with an orange phosphorescent dopant of bis[2-(4-tert-butylphenyl)- benzothiazolato-N,C2′]iridium (acetylacetonate) [(t-bt) 2Ir(acac)]. After the optimization of doping concentration of the first emissive layer (FEL), the device with DEL exhibited 11% lower roll-off power efficiency than single emissive layer devices (SED) when the luminance increased from 1000 cd/m2 to 10,000 cd/m2. The hole-electron recombination zone in DEL was illuminated by inserting an ultrathin fluorescent probe of 4-(dicyanomethylene)-2-tert-butyl-6 (1,1,7,7-tetramethyljulolidin-4-yl-vinyl)-4H-pyran (DCJTB) in different emissive regions. The performance improvement was attributed to the optimization of energy barrier and the expansion of exciton formation zone within the DEL. © 2014 Elsevier B.V. |
| 英文摘要 | High-performance phosphorescent organic light-emitting diodes (PhOLEDs) by using dual-emissive-layer (DEL) structure to reduce efficiency roll-off were fabricated. The DEL was comprised of a hole-transport-type host of N, N′-bis(naphthalen-1-yl)-N, N′-bis(phenyl)-benzidine (NPB) and a bipolar host of 4,4′-bis(carbazol-9-yl)biphenyl (CBP), which were both doped with an orange phosphorescent dopant of bis[2-(4-tert-butylphenyl)- benzothiazolato-N,C2′]iridium (acetylacetonate) [(t-bt) 2Ir(acac)]. After the optimization of doping concentration of the first emissive layer (FEL), the device with DEL exhibited 11% lower roll-off power efficiency than single emissive layer devices (SED) when the luminance increased from 1000 cd/m2 to 10,000 cd/m2. The hole-electron recombination zone in DEL was illuminated by inserting an ultrathin fluorescent probe of 4-(dicyanomethylene)-2-tert-butyl-6 (1,1,7,7-tetramethyljulolidin-4-yl-vinyl)-4H-pyran (DCJTB) in different emissive regions. The performance improvement was attributed to the optimization of energy barrier and the expansion of exciton formation zone within the DEL. © 2014 Elsevier B.V. |
| 学科主题 | Efficiency - Excitons - Iridium - Light emission - Light emitting diodes |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000340687600060 |
| 源URL | [http://ir.ioe.ac.cn/handle/181551/7307]  |
| 专题 | 光电技术研究所_微电子装备总体研究室（四室） |
| 作者单位 | 1.State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China 2.Chengdu Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China |
| 推荐引用方式 GB/T 7714 | Ma, Zhu,Zhou, Shunliang,Hu, Song,et al. Recombination region improvement for reduced efficiency roll-off in phosphorescent OLEDs with dual emissive layers[J]. Journal of Luminescence,2014,154:376-380. |
| APA | Ma, Zhu,Zhou, Shunliang,Hu, Song,&Yu, Junsheng.(2014).Recombination region improvement for reduced efficiency roll-off in phosphorescent OLEDs with dual emissive layers.Journal of Luminescence,154,376-380. |
| MLA | Ma, Zhu,et al."Recombination region improvement for reduced efficiency roll-off in phosphorescent OLEDs with dual emissive layers".Journal of Luminescence 154(2014):376-380. |
入库方式： OAI收割
来源：光电技术研究所
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