▲ 作者：Sanyang Han, Renren Deng, Qifei Gu, Limeng Ni, Uyen Huynh, Jiangbin Zhang, Zhigao Yi, Baodan Zhao, Hiroyuki Tamura, Anton Pershin, Hui Xu, Zhiyuan Huang, Shahab Ahmad, Mojtaba Abdi-Jalebi, Aditya Sadhanala, Ming Lee Tang, Artem Bakulin, David Beljonne, Xiaogang Liu & Akshay Rao
▲ 連結：
https://www.nature.com/articles/s41586-020-2932-2
▲ 摘要
三態激子的產生、控制和轉移，由於其在固相和固相體系中的壽命和擴散長度，以及在光發射、光電子學、光子變頻和光催化等方面的應用，引起了人們的廣泛關注。
作者證明了通過耦合有機分子和摻鑭的無機絕緣納米顆粒來控制三重態動力學是可能的。
這使得經典禁止的從基態單態到激發態三聯體的躍遷可以獲得振子強度，使三聯體可以通過光子吸收直接在分子上產生。光生單態激子可以通過系統間交叉在亞10皮秒的時間尺度上轉化為三態激子。
這些結果為控制三態激子提供了一種新的方法，對許多光電和生物醫學領域的研究具有重要意義。
▲ Abstract
The generation, control and transfer of triplet excitons in molecular and hybrid systems is of great interest owing to their long lifetime and diffusion length in both solid-state and solution phase systems, and to their applications in light emission, optoelectronics, photon frequency conversion and photocatalysis. Here we demonstrate that it is possible to control triplet dynamics by coupling organic molecules to lanthanide-doped inorganic insulating nanoparticles. This allows the classically forbidden transitions from the ground-state singlet to excited-state triplets to gain oscillator strength, enabling triplets to be directly generated on molecules via photon absorption. Photogenerated singlet excitons can be converted to triplet excitons on sub-10-picosecond timescales with unity efficiency by intersystem crossing. These results provide a new way to control triplet excitons, which is essential for many fields of optoelectronic and biomedical research.