Title: quantum efficiency
Long Title: IUPAC Gold Book - quantum efficiency
DOI: 10.1351/goldbook.Q04988
Status: current

Definition
For a primary photochemical process, quantum efficiency is identical to quantum yield.

Related Terms
- efficiency: https://goldbook.iupac.org//terms/view/E01902
- primary photochemical process: https://goldbook.iupac.org//terms/view/P04839
- quantum yield: https://goldbook.iupac.org//terms/view/Q04991

Source
- PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2267 (https://doi.org/10.1351/pac199668122223)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/Q04988/html
- json: https://goldbook.iupac.org/terms/view/Q04988/json
- xml: https://goldbook.iupac.org/terms/view/Q04988/xml

Citation: Citation: 'quantum efficiency' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.Q04988
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-05-09T07:32:37+00:00