| Autor: |
Li, Huihui, Wang, Min, Zhong, Ziting, Lu, Hua, Zhao, Zujin, Feng, Xin Jiang |
| Zdroj: |
Journal of Materials Chemistry C; 9/14/2024, Vol. 12 Issue 34, p13466-13473, 8p |
| Abstrakt: |
Twisted bipolar molecules with hybridized local and charge-transfer (HLCT) excited states have been demonstrated to form an efficient strategy for achieving high-performance deep-blue electroluminescence (EL) by harvesting both singlet and triplet excitons. In this study, two windmill-type molecules featured with HLCT excited state characteristics were synthesized and they exhibited excellent thermal, morphological and photophysical properties and electrochemical stabilities. Excellent deep-blue EL performances were achieved using 2C2P as an emitter with maximum luminance, current efficiency, power efficiency and external quantum efficiency of 2698 cd m−2, 3.5 cd A−1, 3.3 lm W−1 and 7.6%, respectively. Excellent color purity was found with an emission maximum of 418 nm, Commission Internationale de l'Eclairage coordinates of (0.162, 0.066) and a small full width at half maximum of 55 nm. The results indicate that excellent deep-blue EL performances can be achieved with typical donor–acceptor molecules exhibiting the HLCT process and a large horizontal dipole ratio. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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