COMPOUND THIN-FILM SOLAR CELL AND METHOD FOR PRODUCING SAME

摘要

In order to increase the quality/life or the conversion efficiency of the disclosed compound thin-film solar cell, and increase the performance of the compound thin-film solar cell, the compound thin-film solar cell (100) is characterized by: a light absorption layer and a buffer layer forming a bonded interface; the buffer layer forming the bonded interface with the aforementioned light absorption layer being a compound having a crystal structure of either a defect spinel structure, a wurtzite structure, or a zincblende structure containing at least one element selected from the group consisting of Cd, Zn, In, and Ga, and at least one element selected from the group consisting of S, Se, and Te; and the lattice constant (a) of the buffer layer having the zincblende structure or the lattice constant (a) of the aforementioned buffer layer when the wurtzite structure or the defect spinel structure is converted to the zincblende structure being between 0.59 nm and 0.62 nm inclusive.