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1. (WO2011158899) CIS-BASED THIN FILM SOLAR CELL

Pub. No.:    WO/2011/158899    International Application No.:    PCT/JP2011/063795
Publication Date: Dec 22, 2011 International Filing Date: Jun 16, 2011
IPC: H01L 31/04
Applicants: SHOWA SHELL SEKIYU K. K.
昭和シェル石油株式会社
KIJIMA, Shunsuke
木島 駿介
SUGIMOTO, Hiroki
杉本 広紀
HAKUMA, Hideki
白間 英樹
TANAKA, Yoshiaki
田中 良明
Inventors: KIJIMA, Shunsuke
木島 駿介
SUGIMOTO, Hiroki
杉本 広紀
HAKUMA, Hideki
白間 英樹
TANAKA, Yoshiaki
田中 良明
Title: CIS-BASED THIN FILM SOLAR CELL
Abstract:
Disclosed is a CIS-based thin film solar cell having a structure in which a CIS-based light absorbing layer (13), a buffer layer (14), and a transparent conductive film (15) are stacked in that order, wherein: the buffer layer (14) has a three-layer stacked structure in which a first buffer layer (141), a second buffer layer (142), and a third buffer layer (143) are stacked in that order. The first buffer layer (141) is formed from ZnS and has a thickness of 1 to 3 nm. The second buffer layer (142) is formed from a thin film having a thickness of 20nm or less, in which the composition continuously changes from ZnO to ZnS from the side towards the CIS-based light absorbing layer (13) to the side towards the transparent conductive film (15). The third buffer layer (143) is formed from ZnO and has a thickness of 100 nm or more.