| 摘要 |
PROBLEM TO BE SOLVED: To improve the photoconductive characteristics such as photoelectric conversion efficiency and leakage curent of photovoltaic element, by a method wherein a conductive substrate immersed in a water solution and an electrode immersed in a solution are made conductive so as to form a zinc oxide film on a conductive substrate to be etched away for the formation of a semiconductor layer. SOLUTION: Zinc nitrate water solution 203 in a specific concentration is prepared in a vessel 204 so as to satisfactorily agitate the water solution 203 using a magnetic agitator further to heat the solution up to a specific temperature using a heater 208. Next, a conductive substrate 201 whereon an opposite electrode 202 and an insulating tape 206 are bonded is connected to a power supply 205 and a load resistor 207, to form a circuit through the intermediary of water solution for the formation of a transparent zinc oxide thin film on the surface of a conductive substrate 201 on the negative electrode side, by impressing the circuit with a voltage in a rated current mode. Later, the thin film of the zinc oxide layer is etched away to form a semiconductor layer. Through these procedures, the photoconductive characteristics such as the photoelectric conversion efficiency, leakage current, etc., of the photovoltaic element can be improved. |
