The device parameters for the champion pristine PSC without GO and that with 1 vol% of GO derived from both forward and reverse scans in Fig. 1(b).

GO (vol%)	J SC (mA cm−2)	V OC (V)	FF (%)	PCE (%)
0-Forward	23.21	1.007	66.69	15.59
0-Reverse	23.41	1.026	67.08	16.10
1-Forward	23.45	1.069	68.50	17.17
1-Reverse	23.73	1.072	69.14	17.59