[10p-W321-1~16] 13.9 Compound solar cells

[10p-W321-10] Impact on various alkaline metals incorporation in CZTSe solar cells

〇hitoshi Tampo¹, Shinho Kim¹, Takehiko Nagai¹, Hajime Shibata¹, Shigeru Niki¹ (1.AIST)

Keywords:solar cell, CZTS, kesterite

In this study, effect of various types of alkaline metals incorporation for Cu₂ZnSnSe₄ was investigated. The Cu₂ZnSnSe₄ was coevaporated, and these alkaline metals were incorporated by the water solutions. The conversion efficiency incorporated alkaline metals improved for all alkaline elements (Li, Na, K, and Rb). The improvement was found to be due to the current density, which is similar tendency of that of NaF incorporation which we previously reported. The effective collection length was found to improve in term of EQE spectra.