Boosting the efficiency of organic persistent room-temperature phosphorescence by intramolecular triplet-triplet energy transfer
Boosting the efficiency of organic persistent room-temperature phosphorescence by intramolecular triplet-triplet energy transfer
复制标题
通过分子内三重态-三重态能量转移提高有机持久室温磷光的效率
DOI:
10.1038/s41467-019-09561-8
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发表时间:
2019-04
影响因子:
16.6
通讯作者:
Tang Ben Zhong
中科院分区:
文献类型:
--
作者:
Zhao Weijun;Cheung Tsz Shing;Jiang Nan;Huang Wenbin;Lam Jacky W. Y.;Zhang Xuepeng;He Zikai;Tang Ben Zhong
Persistent luminescence is a fascinating phenomenon with exceptional applications. However, the development of organic materials capable of persistent luminescence, such as organic persistent room-temperature phosphorescence, lags behind for their normally low efficiency. Moreover, enhancing the phosphorescence efficiency of organic luminophores often results in short lifetime, which sets an irreconcilable obstacle. Here we report a strategy to boost the efficiency of phosphorescence by intramolecular triplet-triplet energy transfer. Incorpotation of (bromo)dibenzofuran or (bromo)dibenzothiophene to carbazole has boosted the intersystem crossing and provided an intramolecular triplet-state bridge to offer a near quantitative exothermic triplet–triplet energy transfer to repopulate the lowest triplet-state of carbazole. All these factors work together to contribute the efficient phosphorescence. The generation and transfer of triplet excitons within a single molecule is revealed by low-temperature spectra, energy level and lifetime investigations. The strategy developed here will enable the development of efficient phosphorescent materials for potential high-tech applications.
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影响因子:
16.6
作者:
Zhao W;He Z;Peng Q;Lam JWY;Ma H;Qiu Z;Chen Y;Zhao Z;Shuai Z;Dong Y;Tang BZ
通讯作者:
Tang BZ
影响因子:
23.5
作者:
Zhao, Weijun;He, Zikai;Tang, Ben Zhong
通讯作者:
Tang, Ben Zhong
影响因子:
41.2
作者:
通讯作者:
--
影响因子:
16.6
作者:
Chen, Chengjian;Huang, Rongjuan;Bryce, Martin R.
通讯作者:
Bryce, Martin R.
影响因子:
5.7
作者:
Higginbotham, Heather F.;Etherington, Marc. K.;Monkman, Andrew P.
通讯作者:
Monkman, Andrew P.