Showa Shell Sekiyu K.k.

Tetsuya Aramoto

Yoshiaki Tanaka

Hideki Hakuma

Katsumi Kushiya

Yoshiyuki Chiba

In an integrated structure of a CIS based thin film solar cell obtained by stacking an light absorbing layer, a high-resistance buffer layer, and a window layer in that order, a first buffer layer adjoining the light absorbing layer is made of a compound containing cadmium (Cd), zinc (Zn), or indium (In), a second buffer layer adjoining the first buffer layer is made of a zinc oxide-based thin film, a third buffer layer is formed to cover the end face exposed by forming an interconnect pattern in the light absorbing layer, the first buffer layer, and the second buffer layer and the top end surface of the second buffer layer, and the third buffer layer is made of a zinc oxide-based thin film.

Integrated structure of CIS based solar cell

A method of production of a CIS-based thin film solar cell comprises the steps of forming an alkali control layer on a high strain point glass substrate, forming a back surface electrode layer on the alkali control layer, forming a CIS-based light absorption layer on the back surface electrode layer, and forming an n-type transparent conductive film on the CIS-based light absorption layer, wherein the alkali control layer is formed to a thickness which allows heat diffusion of the alkali metal which is contained in the high strain point glass substrate to the CIS-based light absorption layer and, furthermore, the CIS-based light absorption layer has an alkali metal added to it from the outside in addition to heat diffusion from the high strain point glass substrate.

Growing community of inventors

Tokyo, Japan

Tetsuya Aramoto