Environmentally Benign and Efficient Ag2S-ZnO Nanowires as Photoanodes for Solar Cells: Comparison with CdS-ZnO Nanowires
SCIE
SCOPUS
- Title
- Environmentally Benign and Efficient Ag2S-ZnO Nanowires as Photoanodes for Solar Cells: Comparison with CdS-ZnO Nanowires
- Authors
- Hwang, I; Yong, K
- Date Issued
- 2013-02-04
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- In this work, we develop a low-temperature, facile solution reaction route for the fabrication of quantum-dot-sensitized solar cells (QDSSCs) containing Ag2S-ZnO nanowires (NWs), simultaneously ensuring low manufacturing costs and environmental safety. For comparison, a CdS-ZnO NW photoanode was also prepared using the layer-by-layer growth method. Ultraviolet photoelectron spectroscopy analysis revealed type-II band alignments for the band structures of both photoanodes which facilitate electron transfer/collection. Compared to CdS-ZnO QDSSCs, Ag2S-ZnO QDSSCs exhibit a considerably higher short-circuit current density (Jsc) and a strongly enhanced light-harvesting efficiency, but lower open-circuit voltages (Voc), resulting in almost the same power-conversion efficiency of 1.2%. Through this work, we demonstrate Ag2S as an efficient quantum-dot-sensitizing material that has the potential to replace Cd-based sensitizers for eco-friendly applications.
- Keywords
- Ag2S; nanowires; quantum dots; solar cells; ZnO; QUANTUM DOTS; SYSTEM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13958
- DOI
- 10.1002/CPHC.201200876
- ISSN
- 1439-4235
- Article Type
- Article
- Citation
- CHEMPHYSCHEM, vol. 14, no. 2, page. 364 - 368, 2013-02-04
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