Photovoltaic parameters under 100 mW cm⁻² stimulated AM1.5G sunlight^a.

HTM	J IPCE [mA cm−2]	J SC [mA cm−2]	V OC [V]	FF	PCE [%]
Spiro	4.31	6.44 ± 0.72	0.70 ± 0.06	0.124 ± 0.064	0.6 ± 0.3
Spiro/Li/TBP	19.67	20.42 ± 0.65	1.04 ± 0.04	0.484 ± 0.046	10.3 ± 1.5
Spiro/Li/TBP/FK209	20.36	20.57 ± 0.48	1.10 ± 0.01	0.718 ± 0.010	16.2 ± 0.6
Spiro/Li/TBP/FeCl3	20.61	21.14 ± 0.42	1.11 ± 0.01	0.734 ± 0.011	17.2 ± 0.7

^aEach value is the average of the data taken from 12 devices. J^IPCE_SC was derived via wavelength integration of the product of the standard AM1.5G emission spectrum (ASTM G173-03) and the IPCEs were measured at the short-circuit.