| Title |
A Research on Improvement of Hydrogen Generation using CdS/CIGS Photo-Electrode in Photoelectrochemical System |
| Authors |
고영희(Young Hee Ko); 박광훈(Gwang Hun Park); 김은숙(Eun Sook Kim); 배효정(Hyo Jung Bae); 고항주(Hang Ju Ko); 하준석(Jun Seok Ha) |
| DOI |
https://doi.org/10.3365/KJMM.2015.53.5.365 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
photoelectrochemisty; PEC; photoelectrode; hydrogen generation; CdS; CIGS |
| Abstract |
We investigated the photoelectrochemical (PEC) properties of CdS/CIGS thin films as the hydrogengenerating photo-electrode in Na2SO4 electrolyte. The onset potential of CIGS of thin film by itself which is a point of beginning redox reaction for hydrogen generation was .0.6 V under illumination of 200 mW. However, with the deposition of CdS layer on CIGS film, CdS/CIGS structures produced three times enhanced photocurrents at .0.1 V vs compared with only CIGS thin film. CdS layer has ideal band-gap energy and position for redox reaction under visible light irradiation. Also, CdS layer could make P-N junction with CIGS film and form stepwise band-gap structure, which help electrons and holes transfer more easily. From these results, CdS/CIGS thin films could be regarded as a promising photo-electrode cell structure for hydrogen generation. |