[14p-A34-1~10] 13.10 Compound solar cells

[14p-A34-1] [Young Scientist Presentation Award Speech] Improvement of efficiency of Se-free Cu(In,Ga)S₂ thin-film solar cells

〇Homare Hiroi^1,2,3, Yasuaki Iwata³, Hiroki Sugimoto³, Akira Yamada¹ (1.Tokyo Tech., 2.Showa Shell Sekiyu, 3.Solar Frontier)

Keywords:Semiconductor, Thin-Film Solar Cells

Se-free Cu(In,Ga)S₂ (CIGS) is a promising material for solar cells from an aspect of low-cost production because H₂Se which is an expensive material can be removable. In this paper, we focused on the absorber layer via rapid thermal annealing (RTA) and the Cd-free buffer layer by using Zn_1-xMg_xO (ZMO). Additionally, the dependences of electrical parameters on ramp-up speed during sulfurization for absorber and Mg content of ZMO buffer layer were revealed. Furthermore, the latest result of our research on Se-free Cu(In,Ga)S₂ solar cells by combination of RTA and ZMO will be shown at the conference.