| abstract |
Various methods are used to provide a desired doped metal concentration in a CIGS-containing ink when a CIGS layer is deposited on a photovoltaic device. When the metal-based sodium is doped, it can be incorporated by the following steps: At the beginning of the synthesis reaction of Cu (In, Ga) (S, Se) 2 nano particles, for example, the sodium salt of sodium acetate and copper containing , Indium, and / or gallium reagents are added together; Cu (In, Ga) (S, Se) 2 nanometer particles are synthesized and sodium salts are added to the reaction solution, and then gently heated to help the sodium before separating the nanometer particles Diffusion; and / or using a ligand capable of capping these Cu (In, Ga) (S, Se) 2 nanoparticle with one end of its molecular chain and binding to a sodium atom with the other end of its chain. |