改造的基于伊米达和的ESIPT光体作为高效电解发光器件的自吸收自由发射体
Sujinda Petdee1, Kasin Rueantong1, Suangsiri Arunlimsawat1
1Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.
Chemistry, an Asian journal
|December 23, 2024
概括
新的激发状态内分子质子转移 (ESIPT) 分子为有机发光二极管 (OLED) 提供高效,无自我吸收的光. 这些新型光体在无添加物OLED中表现出高性能,为先进的显示技术铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 光物理学的光学物理学
背景情况:
- 激发状态内分子质子转移 (ESIPT) 分子是生物成像,传感和光电子学中宝贵的光体.
- 它们的无自我吸收的光是有机发光二极管 (OLED) 的理想选择,但需要结构优化以实现高效的发光.
研究的目的:
- 为OLED应用设计和合成具有增强性能的新型ESIPT分子.
- 为了研究功能化基于伊米达和的ESIPT核心的结构-属性关系.
主要方法:
- 新ESIPT分子 (2PImBzP,2ImBzP,2FImBzP) 的合成,通过功能化意达-核.
- 纳入缺电子的[d]醇和双极性伊米达部分 (PIm,Im,FIm).
- 光物理性质的表征,包括固态光发光的量子产量 (ΦPL).
主要成果:
- 所有合成的分子都表现出完整的ESIPT,来自纯基托形式的强烈绿色排放.
- 实现了高固态ΦPL (65-80%) 和优越的热稳定性.
- 无添加剂的OLED显示了高亮度,高电流效率 (CE) (10.95-17.66cdA-1) 和低开启电压 (2.8-2.9V).
结论:
- 设计的ESIPT分子是OLEDs的有效非兴奋剂发射器,显示出平衡的电荷载体移动性.
- 电光发光纯粹源于基托 tautomer 发射.
- 基于2PImBzP的OLED实现了特殊的亮度 (56,220 cd m-2),CE (17.66 cd A-1) 和EQE (5.65%) 在最小的滚动下.
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