https://scholars.lib.ntu.edu.tw/handle/123456789/155565
標題: | High Efficiency Phosphorescent Organic Light-Emitting Devices with a New Organic Material as the Host of the Emitting Layer | 作者: | Tsai, Hsin-Hung JIUN-HAW LEE MAN-KIT LEUNG |
關鍵字: | OLED; Phosphorescent | 公開日期: | 2005 | 卷: | 5937 | 起(迄)頁: | 1 - 6 | 來源出版物: | Proceedings of SPIE - The International Society for Optical Engineering | 會議論文: | Organic Light-Emitting Materials and Devices IX | 摘要: | In this paper, we demonstrate a phosphorescent organic light emitting device (PHOLED) with low turn-on voltage by using a n-type organic material as the host of the emitting layer (EML) doped with green emitting complex, fac tris(2-phenylpyridine) iridium Ir(ppy)3. This material exhibits high glass transition temperature (over 200°C) that may help to elongate the operation lifetime. We compare our devices to the classical 4,4'-N,N'-dicarbazole-biphenyl (CBP) based green device. Driving voltage of the CBP and the new-host based OLED is 16 and 11 V with the current density of 100mA/cm2, respectively. The lower driving voltage of the new-host based device comes from the lower HOMO value, i.e. 5.7 eV, which is nearly the same as that of NPB. The current efficiency at 10000 cd/m2 is slightly decreased from 24 to 21 cd/A. However, the power efficiency is increased from 5 to 6 lm/W. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/145873 https://www.scopus.com/inward/record.uri?eid=2-s2.0-31744444871&doi=10.1117%2f12.618897&partnerID=40&md5=8e754e272a23c8a75ff1c45ea37cc5ae |
ISSN: | 0277786X | DOI: | 10.1117/12.618897 | SDG/關鍵字: | Current density; Electric potential; Glass transition; Organic compounds; Phosphorescence; Current efficiency; Organic light-emitting devices (OLED); Light emitting diodes |
顯示於: | 電機工程學系 |
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