Table 1. Photovoltaic Characteristics of PbS, PbS/SG (5L), and PbS/SG (9L) Solar Cells^a.

	Voc (V)	FF	Jsc (mA/cm2)	Rs (Ω)	PCE (%)
PbS	0.52 ± 0.02	0.51 ± 0.02	19.58 ± 0.40	6.38 ± 0.27	5.28 ± 0.53
PbS/SG (5L)	0.52 ± 0.01	0.49 ± 0.01	23.28 ± 1.83	5.17 ± 0.49	6.00 ± 0.36
PbS/SG (9L)	0.54 ± 0.01	0.51 ± 0.02	24.09 ± 0.46	4.20 ± 0.52	6.36 ± 0.34

^aAverage values of each device with standard deviations were collected from more than 5 devices.