Efficient green organic light-emitting diodes with stericly hindered coumarin dopants
-
- Chin H. Chen
- Microelectronics and Information Systems Research Center, Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30050, Republic of China
-
- Ching W. Tang
- Display Technology Laboratory, Eastman Kodak Company, Rochester, New York 14650
書誌事項
- 公開日
- 2001-11-26
- DOI
-
- 10.1063/1.1420583
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>We have discovered two stericly hindered green coumarin derivatives which showed significantly better thermal stability and overall electroluminescence (EL) performance than those of the corresponding 3-(2-benzothiazolyl)-7-(diethylamino)-2H-1-benzopyran-2-one (C-6) and 10-(2-benzothiazolyl)-1,1,7,7-tetramethyl- 2,3,6,7-tetrahydro-1H,5H,11H-benzo[l]pyrano[6,7, 8-ij] quinolizin-11-one (C-545T). The strategic incorporation of bulky spacer t-butyl groups in these dopants considerably delays the onset of concentration quenching. In particular, 10-[2(5,7-di-t-butyl)benzothiazolyl]-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro-1H,5H,11H-benzo-[l]pyrano[6,7,8-ij]quinolizin-11-one (C-545TB) with its superb thermal stability (Tg=142 °C; Td=327 °C), high luminance efficiency (∼13 cd/A), good Commission Interationale d’Eclairage (CIE) coordinates (x=0.30; y=0.64) and a nearly flat EL efficiency dependence on drive current stands out as one of the best choice of green dopants for use in the passive-matrix organic light-emitting diode displays.</jats:p>
収録刊行物
-
- Applied Physics Letters
-
Applied Physics Letters 79 (22), 3711-3713, 2001-11-26
AIP Publishing
