Progress in Polycrystalline Thin-Film Cu(In,Ga)Se₂ Solar Cells

Table 1

Superstrate Cells.

Efficiency	TCO	Buffer	Absorber	Reference
(𝑉oc>800 mV); 3%	ZnO	None	CuGaSe2	Klenk et al. [48]
2.8%	ITO	In2Se3	CuInSe2	Kampmann [49]
6.6%	ITO	CdS	CuInSe2	Yoshida and Birkmire [50]
6.7%	ZnO	CdS	CuInSe2	Negami et al. [51]
8.1%	ZnO	CdS	CuInSe2	Nakada et al [52]
11.2%	ZnO	None	Cu(In,Ga)Se2	Haug et al. [47]
12.8%	ZnO	None	Cu(In,Ga)Se2	Nakada and Mise [43]