Electrical characteristics of thin-film CdS/CdMgTe heterostructure for tandem solar cells

Improved performance of CdTe solar cells with CdS treatment

“…For example, CdS thin films are highly favorable in heterojunction thin-film solar cell applications because of their excellent optical E g , photoconductivity, and high electron affinity (Ferekides and Britt, 1994). CdS is widely used as an n-type window layer in chalcogenide thin-film solar cells, such as CdTe, CIGS, Cu 2 ZnSnS 4 , Cd 1Àx Mg x Te because of its wide E g at room temperature (Britt and Ferekides, 1993;Chirila, 2011;Repins et al, 2008;Kosyachenko et al, 2014;Rejón et al, 2013;Wu, 2004). Of these solar cells, the CdTe solar cell attracts much attention because of its high theoretical conversion efficiency (Eff) of 29% (Green et al, 2013).…”

Ellipsometric investigation of S–Te inter-diffusion and its effect on quantum efficiency of CdS/CdTe thin films solar cell

“…High efficiency CdTe solar cell of 19.6% has been reported recently by GE Global Research (Green et al, 2014). Theoretical calculations have indicated that the highest carrier generation occurs in the vicinity of CdS/CdTe junctions (Kosyachenko et al, 2014). Thus inter-diffusion at the CdS/CdTe junction is generally considered to have an influence on the photocurrent.…”