Patent ID: 8252611
Filing Date: 2012-08-28
Classification: C23C,C25D,H01L,Y02E,Y02P

Abstract:
1. A method of manufacturing a buffer layer of a photoelectric conversion device having a stacked structure in which a lower electrode, a photoelectric conversion semiconductor layer that generates a current by absorbing light, the buffer layer, a translucent conductive layer, and an upper electrode are stacked on a substrate, the method comprising: a fine particle layer forming step for forming a fine particle layer of a plurality of one kind or two or more kinds of fine particles consisting primarily of at least one kind selected from the group consisting of ZnS, Zn(S, O), and Zn(S, O, OH) on the photoelectric conversion semiconductor layer; a preparation step for preparing a reaction solution which includes a component (Z) of at least one kind of zinc source, a component (S) of at least one kind of sulfur source, a component (C) of at least one kind of citrate compound, a component (N) of at least one kind selected from the group consisting of ammonia and ammonium salt, and water, wherein: the concentration of the component (C) is 0.001 to 0.25M; the concentration of the component (N) is 0.41 to 1.0M; and the pH before the start of reaction is 9.0 to 12.0; and a film forming step for forming, using the reaction solution, a Zn compound layer consisting primarily of Zn(S, O) and/or Zn(S, O, OH) on the fine particle layer by a liquid phase method with a reaction temperature of 70 to 95° C., wherein, in the preparation step, an aqueous solution (I) which includes the component (Z), an aqueous solution (II) which includes the component (S), an aqueous solution (III) which includes the component (C), and an aqueous solution (IV) which includes the component (N) are prepared separately, then the aqueous solutions (I), (II), and (III) are mixed to obtain a mixed solution, and the aqueous solution (IV) is mixed in the mixed solution.