Table 2.

Energy loss of the devices based on Qx-1, Qx-2 and Y6 acceptors with PM6 donor.

Devices	$E_{\mathrm{g}}^{{\mathrm{pv}}^{\mathrm{a}}}$ (eV)	EQEEL	${qV}_{\mathrm{OC}}^{\mathrm{SQ}}$ (eV)	${qV}_{\mathrm{OC}}^{\mathrm{rad}}$ (eV)	Eloss (eV)	ΔE1 (eV)	ΔE2 (eV)	ΔE3 (eV)	$V_{\mathrm{OC}}^{\mathrm{Cal}}$(V)
PM6:Qx−1	1.420	2.53 × 10−4	1.157	1.120	0.508	0.263	0.031	0.214	0.912
PM6:Qx−2	1.422	6.60 × 10−4	1.159	1.130	0.482	0.263	0.029	0.190	0.941
PM6:Y6	1.419	1.21 × 10−4	1.157	1.091	0.561	0.262	0.066	0.233	0.858

^aThe optical bandgap ($E_{\mathrm{g}}^{\mathrm{pv}}$) was determined from the derivatives of the EQE curve and the mean peak energy (calculated by the Supplementary equation 13).