Theoretical study on the kesterite solar cells based on Cu2ZnSn(S,Se)4 and related photovoltaic semiconductors
Ma Ji-Chao1, Wei Gao-Feng1, †, Liu Dan-Dan2
       

(color online) The calculated enthalpy of formation for Cu2ZnSn(S1 −xSex)4 alloys as a function of composition x. Adapted from Ref. [42].