Single-Layer Polymer Light-Emitting Diodes With White Emission

• Main Authors: Jui-Hsiang Yen, 顏瑞祥
• Other Authors: Fang-Chung Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/87489793822129868012

碩士 === 國立交通大學 === 電機學院光電顯示科技產業專班 === 95 === In this study, highly efficient single-layer polymer light-emitting diodes (PLEDs) with white emission have been demonstrated. The device structure is ITO/PEDOT:PSS/Host:Dopant/Cs2CO3/Al, where the host material is poly[9,9-di-(2-ethylhexyl)-fluorenyl-2,7-diyl] end capped with N,N-Bis(4-methyl[henyl]-4-aniline (PF2/6am4); the Dopant is Bis(2-(9,9-dihexylfluorenyl)-1-pyridine)(acetylacetonate) irdium (III). After finely tuning of the dopant concentration, white emission has been achieved. It is also found that the device efficiency could be enhanced after the modification of the cathode with cesium carbonate (Cs2CO3). With this specific structure, the peak current efficiency of the white PLEDs can achieve as high as 5.23 cd/A.