Dynamic variation of excitonic coupling in excited bilayer graphene quantum dots

Autor:	Rong-Jing Wei, Xin-Jing Zhao, Gui-jie Liang, Ye Yang, Yuan-Zhi Tan, Kang Wang, Yu Wang
Rok vydání:	2021
Předmět:	Materials science Organic solar cell Chemical physics Quantum dot Graphene law Excited state Ultrafast laser spectroscopy Physical and Theoretical Chemistry Ground state Spectroscopy Bilayer graphene law.invention
Zdroj:	Chinese Journal of Chemical Physics. 34:591-597
ISSN:	2327-2244 1674-0068
Popis:	The intermolecular interaction determines the photophysical properties of the organic aggregates, which are critical to the performance of organic photovoltaics. Here, excitonic coupling, an important intermolecular interaction in organic aggregates, between the π-stacking graphene quantum dots is studied by using transient absorption spectroscopy. We find that the spectral evolution of the ground state bleach arises from the dynamic variation of the excitonic coupling in the excited π-stacks. According to the spectral simulations, we demonstrate that the kinetics of the vibronic peak can be exploited as a probe to measure the dynamics of excitonic coupling in the excited π-stacks.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9e57767a3d67f9eb474743a12a015a5e https://doi.org/10.1063/1674-0068/cjcp2109169 Zobrazit plný text záznamu