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题名: Functionalized terfluorene for solution-processed high efficiency blue fluorescence OLED and electrophosphorescent devices
作者: Chung-Feng Wang
Wen-Yi Hung
Ming-Hung Cheng
Jih-Shang Hwang
Man-kit Leung
Ken-Tsung Wong
贡献者: 國立臺灣海洋大學:光電科學研究所
关键词: Host material;White OLED
Solution-processed OLED
Nondoped blue OLED
日期: 2013
上传时间: 2017-02-15T03:05:56Z
出版者: Organic Electronics
摘要: Abstract: A new multifunctional blue-emitting terfluorene derivative (TFDPA) featured with triphenylamine groups for hole-transportation and long alkyl chains for solution processability on the conjugation inert bridge centers was reported. TFDPA can give homogeneous thin film by solution process and exhibits high hole mobility (μh ≈ 10−3 cm2 V−1 s−1) and suitable HOMO for hole injection. Particularly, TFDPA performs efficient deep-blue emission with high quantum yield (∼100% in solution, 43% in thin film) and suitable triplet energy (ET = 2.28 eV), making solution-processed OLED devices of using TFDPA as blue emitter and as host for iridium-containing phosphorescent dopants feasible. The solution-processed nondoped blue OLED device gives saturated deep-blue electroluminescence [CIE = (0.17, 0.07)] with EQE of 2.7%. TFDPA-hosted electrophosphorescent devices performed with EQE of 6.5% for yellow [(Bt)2Ir(acac)], 9.3% of orange [Ir(2–phq)3], and 6.9% of red [(Mpq)2Ir(acac)], respectively. In addition, with careful control on the doping concentration of [(Bt)2Ir(acac)], a solution-processed fluorescence–phosphorescence hybrided two-color-based WOLED with EQE of 3.6% and CIE coordinate of (0.38, 0.33) was successfully achieved.
關聯: 14(8)
显示于类别:[光電科學研究所] 期刊論文


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