Highly Efficient and Durable Quantum Dot Sensitized ZnO Nanowire Solar Cell Using Noble-Metal-Free Counter Electrode
SCIE
SCOPUS
- Title
- Highly Efficient and Durable Quantum Dot Sensitized ZnO Nanowire Solar Cell Using Noble-Metal-Free Counter Electrode
- Authors
- Seol, M; Ramasamy, E; Lee, J; Yong, K
- Date Issued
- 2011-11-10
- Publisher
- AMER CHEMICAL SOC
- Abstract
- highly efficient quantum dot sensitized solar cell has been fabricated using a CdSe/CdS cosensitized ZnO nanowire array as a photoelectrode (PE), ordered mesocellular carbon foam (MSU-F-C) as a counter electrode (CE), and a polysulfide electrolyte as a hole transporter. The nanowire structure provides efficient photoelectron collection and light harvesting, and CdSe/CdS cosensitization allows utilization of the whole visible Wavelength region of the incident solar spectrum. The MSU-F-C used here provides an extremely high surface area and the ordered large size mesopares with an interconnected pore structure, which facilitate diffusion of redox relay in the electrolyte. As a result; it exhibits low charge transfer resistance (R-ct) between the CE/electrolyte interface and thus presents highly efficient photovoltaic performance, compared to conventional noble-metal-based CEs. The cell with MSU-F-C CE yields the highest power conversion efficiency of 3.60%, V-oc, J(sc), and FF of 685 mV, 12.6 mA/cm(2), and 0.42, respectively. Furthermore, it exhibits high durability in the polysulfide electrolyte with remarkable stability irrespective of the solvent used in the electrolyte solution.
- Keywords
- LOW-COST; CDS; CARBON; NANOCRYSTALS; ARRAYS; PBS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16692
- DOI
- 10.1021/JP205844R
- ISSN
- 1932-7447
- Article Type
- Article
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, vol. 115, no. 44, page. 22018 - 22024, 2011-11-10
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