Fig. 3: Energy loss analysis.

a FTPS-EQE curves of OPVs based on PM6:BO-4Cl, PM6:BTP-S7, PM6:BTP-S8, and PM6:BTP-S9 blends. b EQE_EL of OPVs at various injected current densities. c Comparison of radiative and nonradiative energy losses. d Variations of E_U and EQE_EL in OPVs based on PM6:NFA blends.