Unassisted photoelectrochemical water splitting exceeding 7% solar to hydrogen conversion efficiency using photon recycling
SCIE
SCOPUS
- Title
- Unassisted photoelectrochemical water splitting exceeding 7% solar to hydrogen conversion efficiency using photon recycling
- Authors
- Shi, X; Jeong, H; Oh, SJ; Ma, M; Zhang, K; Kwon, J; Choi, IT; Choi, IY; Kim, HK; Kim, JK; Park, JH
- Date Issued
- 2016-06
- Publisher
- Nature Publishing Group
- Abstract
- Various tandem cell configurations have been reported for highly efficient and spontaneous hydrogen production from photoelectrochemical solar water splitting. However, there is a contradiction between two main requirements of a front photoelectrode in a tandem cell configuration, namely, high transparency and high photocurrent density. Here we demonstrate a simple yet highly effective method to overcome this contradiction by incorporating a hybrid conductive distributed Bragg reflector on the back side of the transparent conducting substrate for the front photoelectrochemical electrode, which functions as both an optical filter and a conductive counter-electrode of the rear dye-sensitized solar cell. The hybrid conductive distributed Bragg reflectors were designed to be transparent to the long-wavelength part of the incident solar spectrum (lambda>500 nm) for the rear solar cell, while reflecting the short-wavelength photons (lambda<500 nm) which can then be absorbed by the front photoelectrochemical electrode for enhanced photocurrent generation.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/36734
- DOI
- 10.1038/NCOMMS11943
- ISSN
- 2041-1723
- Article Type
- Article
- Citation
- Nature Communications, vol. 7, page. 11943, 2016-06
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