Ordered mesoporous Zn-doped SnO(2) synthesized by exotemplating for efficient dye-sensitized solar cells
SCIE
SCOPUS
- Title
- Ordered mesoporous Zn-doped SnO(2) synthesized by exotemplating for efficient dye-sensitized solar cells
- Authors
- Ramasamy, E; Lee, J
- Date Issued
- 2011-07
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- Ordered mesoporous zinc-doped SnO2 (Zn-doped meso-SnO2) particles with a high surface area and a 2D hexagonal-type pore structure are synthesized by a double-replication procedure using SBA-15 silica and CMK-3 carbon as successive hard templates. The double-replication procedure provides large mesopores (diameter similar to 10 nm), which are essential in dye-sensitized solar cells (DSCs) for the facile diffusion of redox electrolytes. It is shown that Zn doping into an ordered mesoporous SnO2 framework induces a negative shift in the flat-band potential (V-FB) and also increases the isoelectric point. Consequently, DSCs employing Zn-doped meso-SnO2 photoanodes demonstrate longer electron lifetimes and increased dye loading than their undoped meso-SnO2 counterparts. A maximum energy-conversion efficiency (eta) of 3.73% is achieved from solar cells fabricated with 3 mol% Zn-doped meso-SnO2 photoanodes, a nearly five-fold improvement compared to undoped meso-SnO2 photoanode DSCs (eta = 0.81%).
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10147
- DOI
- 10.1039/C1EE01123E
- ISSN
- 1754-5692
- Article Type
- Article
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, vol. 4, no. 7, page. 2529 - 2536, 2011-07
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