abstract |
The present invention, for providing a photocurrent, the formula (I): BiCu 1-z O a S b Se c Te d (I) [ wherein, 0 ≦ z ≦ 0.2; 0 ≦ a ≦ 2; 0 ≦ b ≦ 2; 0 ≦ c ≦ 2; 0 ≦ d ≦ 2; and a + b + c + d = 2] relates to the use of a material containing at least one compound as a p-type semiconductor. The present invention also relates to a photovoltaic device using these semiconductors. |