On the energetics of bound charge-transfer states in organic photovoltaics

Jiangbin Zhang, AC Jakowetz, Guangru Li, Dawei Di, Stephen Menke, Akshay Rao, Richard Friend & Artem Bakulin
A comprehensive understanding of the charge generation mechanism in organic solar cells is critical for further improvement of device performance. Currently, the origin and magnitude of the Coulombic binding energy of the charge-transfer state (CTS), an intermediate state which is fundamental for the charge separation process, are still under debate. Here, we propose a new approach for determining the dissociation energy of localised CTSs for a range of devices with different alignments of molecular energy...

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