Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes
Efficient up-conversion of triplet excitons into a singlet state and its application for organic light emitting diodes
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DOI：
10.1063/1.3558906
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发表时间：
2011-02-21
影响因子：
4
通讯作者：
Adachi, Chihaya
中科院分区：
文献类型：
--
作者：
Endo, Ayataka;Sato, Keigo;Adachi, Chihaya
报道了一种单重态和三重态激发态之间具有非常小的能隙的材料Delta E1-3，它允许三重态激子有效地上转换为单重态，并导致有效的热激活延迟荧光（TADF）。该化合物，2-联苯-4,6-双（12-苯基lindolo[2,3-a]咔唑-11-基）-1,3,5-三嗪，打破了大能隙的限制，δ E1-3仅为0.11 eV，同时保持了较高的荧光辐射衰减率(k（r)类似于10(7)）。强烈的TADF为高效电致发光提供了途径。(C) 2011年美国物理研究所。(doi: 10.1063/1.3558906)
A material possessing a very small energy gap between its singlet and triplet excited states, Delta E1-3, which allows efficient up-conversion of triplet excitons into a singlet state and leads to efficient thermally activated delayed fluorescence (TADF), is reported. The compound, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a] carbazole-11-yl)-1,3,5-triazine, breaks the restriction of a large energy gap, with a Delta E1-3 of just 0.11 eV, while maintaining a high fluorescent radiative decay rate (k(r) similar to 10(7)). The intense TADF provides a pathway for highly efficient electroluminescence. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3558906]