2003年7月
Confinement of triplet energy on phosphorescent molecules for highly-efficient organic blue-light-emitting devices
APPLIED PHYSICS LETTERS
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- 巻
- 83
- 号
- 3
- 開始ページ
- 569
- 終了ページ
- 571
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/1.1594834
- 出版者・発行元
- AMER INST PHYSICS
We have significantly improved the emission efficiency in an organic light-emitting device (OLED) based on iridium (III)bis[(4,6-di-fluoropheny)-pyridinato-N,C2']picolinate (FIrpic). To improve the efficiency, 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl, which has a high triplet energy, was used as the carrier-transporting host for the emissive layer. The FIrpic-based OLED exhibited a maximum external quantum efficiency of 10.4%, corresponding to a current efficiency of 20.4 cd/A, and a maximum power efficiency of 10.5 lm/W. The efficiency was drastically improved compared to that of a previously reported FIrpic-based OLED. This result indicates that triplet energy is efficiently confined on FIrpic molecules, resulting in the high efficiency. (C) 2003 American Institute of Physics.
- リンク情報
- ID情報
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- DOI : 10.1063/1.1594834
- ISSN : 0003-6951
- Web of Science ID : WOS:000184186700055