@article{Cheng2024, 
author = {Lin Cheng and Rongrong Hu and Meizhen Jiang and Yumeng Men and Yang Wang and Jinlei Li and Tianqing Jia and Zhenrong Sun and Donghai Feng},
title = {Extremely long-lived charge separation and related carrier spin excitation in CsPbBr3 perovskite quantum dots with an electron acceptor benzoquinone},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {12},
pages = {10649-10654},
keywords = {charge separation, perovskite quantum dots, CsPbBr3, spin coherence, pump-orientation-probe, time-resolved ellipticity},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6466-z},
doi = {10.1007/s12274-024-6466-z},
abstract = {The formation and evolution dynamics of charge separation (CS) in a complex of CsPbBr3 quantum dots (QDs) and 1,4-benzoquinone (BQ) molecules are measured with a high-sensitive pump-orientation-probe technique by which spin signals of the CS state are monitored. An extraordinarily long-lasting CS is observed, with a characteristic time being up to a dozen days under ambient conditions, due to electron transferring from QDs to BQ molecules. Upon the long-lived CS, spin coherences of both electrons and holes are detected at room temperature, with a spin dephasing time of 420 and 26 ps, respectively. The long-lived CS and spin coherence have important implications for applications of perovskite nanomaterials in photocatalysis, photovoltaics, and spintronics.}
}