2:15 PM - 2:30 PM [21p-S221-2] Highly efficient Cu(In,Ga)Se2 solar cells with a single graded band profile by control of the valence band offset at low temperature deposition 〇Tomohiro Ogihara1, Adiyudha Sadono1, Akira Yamada1,2 (1.Tokyo Inst., 2.PVREC)