Cu(In,Ga)Se 2 (CIGS) absorber layers were grown at a maximum substrate temperature of 400 C on polyimide (PI) films. The PI films were formed by spin-coating on glass substrates. Alkali doping into the CIGS layers was demonstrated using alkali-silicate glass thin layers (hereafter called ASTL) deposited on PI films prior to the sputtering of the Mo back contact layer. The quantum efficiency curves of CIGS solar cells fabricated with use of ASTL showed an enhanced absorption in the long wavelength region. Using the ASTL method, the cell efficiency of 14.7% has been demonstrated on PI substrate. #
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.