High Open Circuit Voltage Quantum Dot Sensitized Solar Cells Manufactured with ZnO Nanowire Arrays and Si/ZnO Branched Hierarchical Structures
- Title
- High Open Circuit Voltage Quantum Dot Sensitized Solar Cells Manufactured with ZnO Nanowire Arrays and Si/ZnO Branched Hierarchical Structures
- Author
- 박원일
- Keywords
- charge transport; hierarchical ZnO; QD-sensitized solar cells; quantum dots; silicon nanowires; ZnO nanowire
- Issue Date
- 2011-08
- Publisher
- AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Vol.2 No.16 [2011], 1984-1990
- Abstract
- Quantum dot sensitized solar cells (QDSCs) are currently receiving increasing attention as an alternative to conventional dyes. The efficiencies of QDSCs have experienced a fast growth in the last years, mainly due to an increase in the reported photocurrents and fill factors. Despite this increase, further enhancement of QDSCs needs an improvement of the obtained photovoltage, V(oc), being the current main challenge in these devices. Here we show that an appropriated nanostructure of wide band gap semiconductor electrode allows us to reduce the recombination process, with a significant enhancement of V(oc). V(oc) as high as 0.77 V has been demonstrated for ZnO nanowires array electrodes. The performance of the cell can be even increased to a promising 3%, using a novel photoanode architecture of "pine tree" ZnO nanorods (NRs) on Si NWs hierarchical branched structure. Most importantly, we show the necessity of exploring new electrode architectures to improve the current efficiencies of QDSCs.
- URI
- https://pubs.acs.org/doi/abs/10.1021/jz200848vhttps://repository.hanyang.ac.kr/handle/20.500.11754/72887
- ISSN
- 1948-7185
- DOI
- 10.1021/jz200848v
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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