共 28 条
Enhanced Photoelectrochemical Water Splitting through Bismuth Vanadate with a Photon Upconversion Luminescent Reflector
被引:54
作者:

Choi, Dongho
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Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea

Nam, Seong Kyung
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Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea

Kim, Kiwon
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机构:
Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea

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机构:
[1] Sogang Univ, Dept Chem & Biomol Engn, Seoul 04107, South Korea
基金:
新加坡国家研究基金会;
关键词:
bismuth vanadate;
luminescent reflectors;
photon upconversion;
water splitting;
TRIPLET-TRIPLET ANNIHILATION;
CHARGE SEPARATION;
MONOCLINIC BIVO4;
LIGHT-ABSORPTION;
PHOTOANODE;
EFFICIENCY;
OXIDATION;
CELL;
D O I:
10.1002/anie.201813440
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
As the performance of photoanodes for solar water splitting steadily improves, the extension of the absorption wavelength in the photoanodes is highly necessary to substantially improve the water splitting. We use a luminescent back reflector (LBR) capable of photon upconversion (UC) to improve the light harvesting capabilities of Mo:BiVO4 photoelectrodes. The LBR is prepared by dispersing the organic dye pair meso-tetraphenyltetrabenzoporphine palladium and perylene capable of triplet-triplet annhilation-based UC in a polymer film. The LBR converts the wavelengths of 600-650nm corresponding to the sub-band gap of Mo:BiVO4 and the wavelengths of 350-450nm that are not sufficiently absorbed in Mo:BiVO4 to a wavelength that can be absorbed by a Mo:BiVO4 photoelectrode. The LBR improves the water splitting reaction of Mo:BiVO4 photoelectrodes by 17%, and consequently, the Mo:BiVO4/LBR exhibits a photocurrent density of 5.25mAcm(-2) at 1.23V versus the reversible hydrogen electrode. The Mo:BiVO4/LBR exhibits hydrogen/oxygen evolution corresponding to the increased photocurrent density and long-term operational stability for the water splitting reaction.
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收藏
页码:6891 / 6895
页数:5
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Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Solar Fuels, Hahn Meitner Pl 1, D-14109 Berlin, Germany Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Sch Environm Sci & Engn, Pohang 790784, South Korea

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