Table 1.

The effect of SA-1 on the photovoltaic parameters of devices based on different active layers

Active layer	SA-1a (wt.%)	Voc (V)	Jsc (mA cm−2)	FF	PCE (%)b
PBDB-TF:IT-4F	None	0.89 ± 0.01	18.8 ± 0.3	0.71 ± 0.02	11.9 ± 0.2 (12.2)
	17.3%	0.86 ± 0.01	20.2 ± 0.3	0.76 ± 0.01	13.3 ± 0.3 (13.8)
PBDB-TCl:IT-4F	None	0.90 ± 0.01	19.0 ± 0.4	0.71 ± 0.02	12.3 ± 0.3 (12.8)
	17.3%	0.86 ± 0.01	21.1 ± 0.2	0.75 ± 0.02	13.7 ± 0.4 (14.2)
PBDB-TF:IT-2F	None	0.94 ± 0.01	18.2 ± 0.2	0.72 ± 0.02	12.3 ± 0.3 (12.7)
	17.8%	0.92 ± 0.01	19.2 ± 0.3	0.76 ± 0.02	13.3 ± 0.3 (13.7)
PBTA-TF:IT-M	None	0.95 ± 0.01	18.2 ± 0.2	0.66 ± 0.03	11.4 ± 0.2 (11.8)
	17.5%	0.94 ± 0.01	19.0 ± 0.3	0.70 ± 0.01	12.4 ± 0.3 (12.8)
PBDB-T:ITIC	None	0.89 ± 0.01	16.2 ± 0.4	0.63 ± 0.03	9.1 ± 0.2 (9.4)
	17.8%	0.87 ± 0.01	17.1 ± 0.2	0.69 ± 0.02	10.2 ± 0.1 (10.4)
PBDB-T:ITCC	None	0.98 ± 0.01	15.2 ± 0.3	0.63 ± 0.02	9.3 ± 0.3 (9.7)
	18.2%	0.97 ± 0.01	15.6 ± 0.2	0.70 ± 0.01	10.2 ± 0.2 (10.6)
J52:IEICO	None	0.86 ± 0.01	13.4 ± 0.2	0.51 ± 0.02	5.9 ± 0.2 (6.2)
	14.9%	0.86 ± 0.01	14.5 ± 0.4	0.57 ± 0.02	6.7 ± 0.4 (7.3)

^aThe weight ratios of SA-1 for different systems are calculated from each case when the mole ratio of NF acceptor and SA-1 is 1:1

^bThe maximum PCEs are shown in the parentheses