Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 16, Issue 6, Pages 1607-1610Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2009.2037831
Keywords
Black dye; CdS; flower-like ZnO nanorod; quantum dot (QD); solar cells
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Funding
- Nanyang Technology University [RGM 44/06]
- National Science Foundation of China [50872022]
- Foundation of Doctoral Program of Ministry of Education [20030286003]
- Scientific Research Foundation of Graduate School of Southeast University [YBJJ0927]
- Program for New Century Excellent Talents in University
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We shall present a cosensitized solar cell with sequentially assembled CdS quantum dots (QDs) and black dye on a flower-like ZnO rod nanostructure. As revealed by UV-vis absorption spectrum and scanning electron microscopy CdS QDs and black dye can be effectively adsorbed onto a flower-like ZnO nanorod array. Besides acting as a sensitizer, CdS QDs layer helps to prevent formation of Zn(2+)/dye complex. CdS QDs also provide intermediate energy levels for excited electron transfer from black dye to ZnO film. A power conversion efficiency as high as 3.26% was achieved for CdS QD and black dye cosensitized ZnO photoanode under the illumination of one Sun ( AM1.5G, 100 mW/cm(2)).
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