| abstract |
The invention discloses a solar cell with a CZTS absorption layer and a method for forming the same. The solar cell comprises a substrate, a lower electrode layer, an absorbing layer, a buffer layer and an upper electrode layer. The absorbing layer comprises a first region and a second region, and the first region is adjacent to the lower electrode layer and the second region Adjacent to the first area. The first region and the second region each contain a chemical formula of Cua(Zn1-bSnb)(Se1-cSc)2, wherein 0<a<1,0<b<1,0≦c≦1, and the first region Zn/Sn is higher than the Zn/Sn ratio of the second region. |