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Using the Spectroscopic Limited Maximum Efficiency, and Shockley and Queisserpredictor models, we compute the solar efficiency of the chalcopyritesAgMX2(M=In,Al;X=S,Se,Te). The results presented are based on the estimation ofthe electronic and optical properties obtained from first principles densityfunctional theory as well as the many-body perturbation theory calculations.The results from this report were consistent with the experimental data. Theoptical bandgap was accurately estimated from the absorption spectra, obtainedby solving the Bethe and Salpeter equation. Fitting the Tauc's plot on theabsorption spectra, we also predicted that the materials studied have a directallowed optical transition. The theoretical estimations of the solar cellperformance showed that the efficiencies from the Shockley and Queisser modelare higher than those from the spectroscopic limited maximum efficiency model.This improvement is attributed to the absorption.

First principles prediction of the solar cell efficiency of chalcopyrite materials AgMX2 (M=In,Al; X=S, Se,Te)