charge-transfer exciton

https://doi.org/10.1351/goldbook.08783
Exciton formed by a charge-transfer transition.
Source:
PAC, 2022, 94, 15. 'Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)' on page 19 (https://doi.org/10.1515/pac-2020-0501)