期刊
NATURE PHOTONICS
卷 6, 期 4, 页码 253-258出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nphoton.2012.31
关键词
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资金
- Konica Minolta Science and Technology Foundation
- Program for World-Leading Innovative R&D on Science and Technology (FIRST)
- Grants-in-Aid for Scientific Research [22750163] Funding Source: KAKEN
Light emission from organic light-emitting diodes that make use of fluorescent materials have an internal quantum efficiency that is typically limited to no more than 25% due to the creation of non-radiative triplet excited states. Here, we report the use of electron-donating and electron-accepting molecules that allow a very high reverse intersystem crossing of 86.5% between non-radiative triplet and radiative singlet excited states and thus a means of achieving enhanced electroluminescence. Organic light-emitting diodes made using m-MTDATA as the donor material and 3TPYMB as the acceptor material demonstrate that external quantum efficiencies as high as 5.4% can be achieved, and we believe that the approach will offer even higher values in the future as a result of careful material selection.
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