solar conversion efficiency

https://doi.org/10.1351/goldbook.S05728
The ratio of the Gibbs energy gain per unit time per m2 of surface exposed to the sun and the solar irradiance, E, integrated between λ=0 and λ=.
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2274 [Terms] [Paper]