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Luminous Butterflies: Efficient Exciton Harvesting by Benzophenone Derivatives for Full‐Color Delayed Fluorescence OLEDs |
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| Authors: | Sae Youn Lee Prof?Dr Takuma Yasuda Dr Yu Seok Yang Dr Qisheng Zhang Prof?Dr Chihaya Adachi |
| Institution: | 1. Department of Applied Chemistry and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi‐ku, Fukuoka 819‐0395 (Japan) http://www.cstf.kyushu‐u.ac.jp/～adachilab/;2. International Institute for Carbon Neutral Energy Research (WPI‐I2CNER), Kyushu University, 744 Motooka, Nishi‐ku, Fukuoka 819‐0395 (Japan);3. PRESTO (Japan) Science and Technology Agency (JST), Chiyoda‐ku, Tokyo 102‐0076 (Japan) |
| Abstract: | Butterfly‐shaped luminescent benzophenone derivatives with small energy gaps between their singlet and triplet excited states are used to achieve efficient full‐color delayed fluorescence. Organic light‐emitting diodes (OLEDs) with these benzophenone derivatives doped in the emissive layer can generate electroluminescence ranging from blue to orange–red and white, with maximum external quantum efficiencies of up to 14.3 %. Triplet excitons are efficiently harvested through delayed fluorescence channels. |
| Keywords: | benzophenone donor– acceptor systems organic light‐emitting diodes organic semiconductors photochemistry |