Effects of Sulfurization Pressure on the Conversion Efficiency of Cosputtered Cu₂ZnSnS₄ Thin Film Solar Cells

Table 1

Elemental composition of the sulfurized CZTS thin films by XRF.

Elements	Atomic %
	780 Torr	760 Torr	730 Torr	700 Torr	670 Torr
Cu	21.14	21.00	20.72	20.85	21.00
Zn	13.23	14.53	14.84	14.86	14.90
Sn	11.45	12.05	12.56	12.44	12.76
S	54.16	52.40	51.81	51.82	51.34
Zn/Sn	1.15	1.20	1.10	1.20	1.15
Cu/(Zn + Sn)	0.85	0.78	0.75	0.76	0.75
S/(Cu + Zn + Sn)	1.18	1.10	1.07	1.07	1.05