College of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China.
Molecules. 2022 Mar 1;27(5):1632. doi: 10.3390/molecules27051632.
Perchlorotrityl radical (PTM), tris (2,4,6-trichlorophenyl) methyl radical (TTM), (3,5-dichloro-4-pyridyl) bis (2,4,6 trichlorophenyl) methyl radical (PyBTM), (N-carbazolyl) bis (2,4,6-trichlorophenyl) methyl radical (CzBTM), and their derivatives are stable organic radicals that exhibit light emissions at room temperature. Since these triarylmethyl radicals have an unpaired electron, their electron spins at the lowest excited state and ground state are both doublets, and the transition from the lowest excited state to the ground state does not pose the problem of a spin-forbidden reaction. When used as OLED layers, these triarylmethyl radicals exhibit unique light-emitting properties, which can increase the theoretical upper limit of the OLED's internal quantum efficiency (IQE) to 100%. In recent years, research on the luminescent properties of triarylmethyl radicals has attracted increasing attention. In this review, recent developments in these triarylmethyl radicals and their derivatives in OLED devices are introduced.
高氯酸三苯基甲基自由基（PTM）、三（2,4,6-三氯苯基）甲基自由基（TTM）、（3,5-二氯-4-吡啶基）双（2,4,6-三氯苯基）甲基自由基（PyBTM）、（N-咔唑基）双（2,4,6-三氯苯基）甲基自由基（CzBTM）及其衍生物是稳定的有机自由基，它们在室温下具有发光性能。由于这些三芳基甲基自由基具有未配对电子，它们在最低激发态和基态的电子自旋都是双重的，并且从最低激发态到基态的跃迁不存在自旋禁阻反应的问题。当用作 OLED 层时，这些三芳基甲基自由基表现出独特的发光特性，可以将 OLED 的理论内量子效率（IQE）上限提高到 100%。近年来，三芳基甲基自由基的发光性能研究受到了越来越多的关注。本文综述了近年来在 OLED 器件中三芳基甲基自由基及其衍生物的研究进展。
