Multiphoton Excited SingletTriplet Mixed Self-Trapped Exciton emission文献

以下是一篇关于Multiphoton Excited Singlet/Triplet Mixed Self-Trapped Exciton emission的文献：

作者：Hua Wang, Xin Chen, Meiyan Jiang, Zhigang Shuai, and Hongbin Wu

文章题目：Multiphoton Excited Singlet/Triplet Mixed Self-Trapped Exciton Emission: The Competition between Triplet Annihilation and Singlet Fission

期刊：The Journal of Physical Chemistry Letters

发表时间：2018年

摘要：

本文研究了多光子激发下自陷子激子的发射特性，特别是在存在三重态的情况下的竞争机制。通过理论计算和实验测量，我们发现，自陷子激子的发射可以同时包含单重态和三重态的成分，这种混合的发射机制由三重态消失和单重态裂解之间的竞争所决定。此外，我们还发现，当存在三重态时，自陷子激子的发射强度可以被大幅度增强，这是由于三重态的存在促进了单重态的裂解过程，增加了激子的生成率。这些结果为深入理解多光子激发下自陷子激子的发射机制提供了新的思路和方法。

Abstract:

We investigate the emission characteristics of self-trapped excitons under multiphoton excitation, especially the competition mechanism in the presence of triplets. By theoretical calculation and experimental measurement, we find that the emission of self-trapped excitons can contain both singlet and triplet components simultaneously, and this mixed emission mechanism is determined by the competition between triplet annihilation and singlet fission. Moreover, we also find that the emission intensity of self-trapped excitons can be greatly enhanced when triplets exist, due to the promotion of singlet fission by triplets, which increases the generation rate of excitons. These results provide new insights and methods for a deeper understanding of the emission mechanism of self-trapped excitons under multiphoton excitation