High efficiency, solution-processed, red phosphorescent organic light-emitting diodes from a polymer doped with iridium complexes |
| |
| Authors: | Myungkwan Song Jin Su Park Chul-Hyun Kim Min Joung Im Jang Soo Kim Yeong-Soon Gal Jae-Wook Kang Jae Wook Lee Sung-Ho Jin |
| |
| Affiliation: | 1. Department of Chemistry Education, Interdisciplinary Program of Advanced Information and Display Materials, and Center for Plastic Information System, Pusan National University, Busan 609-735, Republic of Korea;2. Polymer Chemistry Lab., Kyungil University, Hayang 712-701, Republic of Korea;3. Department of Surface Technology, Korea Institute of Materials Sciences, Changwon 641-831, Republic of Korea;4. Department of Chemistry, Dong-A University, Busan 604-714, Republic of Korea |
| |
| Abstract: | High efficiency, solution-processed, red emissive phosphorescent organic light-emitting diodes (PhOLEDs) have been developed. The PhOLEDs utilize bis[9-ethyl-3-(4-phenylquinolin-2-yl)-9H-carbazolato-N,C2′]iridium picolinate (Et-Cvz-PhQ)2Ir(pic) and bis[9-(2-(2-methoxyethoxy)ethyl)-3-(4-phenylquinolin-2-yl)-9H-carbazolato-N,C2′]iridium picolinate (EO-Cvz-PhQ)2Ir(pic) in a nonconjugated polymer host of PVK that contains the electron transport material of OXD-7 and the hole transport material TPD. The electroluminescence (EL) spectra of the PhOLEDs parallel those of (Et-Cvz-PhQ)2Ir(pic) and (EO-Cvz-PhQ)2Ir(pic) with maxima at 608 nm and a CIE (Commission International de l’Eclairage) coordinate of (0.62, 0.38). The red emitting PhOLEDs, based on ITO/PEDOT:PSS/PVK:OXD-7:TPD:Ir complex/cathode configuration, have a maximum external quantum efficiency of 10.6% and a luminance efficiency of 17.5 cd/A. The efficiency is significantly higher than those obtained using common solution-processed red emissive PhOLEDs. |
| |
| Keywords: | Solution-process PhOLEDs Phosphorescent Red Hole transporting material |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
