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Jang, Ji-Wook
JW Energy Lab
Research Interests
  • Materials Science, Energy

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Wireless Solar Water Splitting Device with Robust Cobalt-Catalyzed, Dual-Doped BiVO4 Photoanode and Perovskite Solar Cell in Tandem: A Dual Absorber Artificial Leaf

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Title
Wireless Solar Water Splitting Device with Robust Cobalt-Catalyzed, Dual-Doped BiVO4 Photoanode and Perovskite Solar Cell in Tandem: A Dual Absorber Artificial Leaf
Author
Kim, Jin HyunJo, YimhyunKim, Ju HunJang, Ji-WookKang, Hyun JunLee, Young HyeKim, Dong SukJun, YongseokLee, Jae Sung
Issue Date
2015-12
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.9, no.12, pp.11820 - 11829
Abstract
A stand-alone, wireless solar water splitting device without external energy supply has been realized by combining in tandem a CH(3)NH(3)Pbl(3) perovskite single junction solar cell with a cobalt carbonate (Co-Ci)-catalyzed, extrinsic/intrinsic dual-doped BiVO4 (hydrogen-treated and 3 at% Mo-doped). The photoanode recorded one of the highest photoelectrochemical water oxidation activity (4.8 mA/cm(2) at 1.23 V-RHE) under simulated 1 sun illumination. The oxygen evolution Co-Ci co-catalyst showed similar performance to best known cobalt phosphate (Co-Pi) (5.0 mA/cm(2) at 1.23 VRHE) on the same dual-doped BiVO4 photoanode, but with significantly better stability. A tandem artificial-leaf-type device produced stoichiometric hydrogen and oxygen with an average solar-to-hydrogen efficiency of 4.3% (wired), 3.0% (wireless) under simulated 1 sun illumination. Hence, our device based on a D4 tandem photoelectrochemical cell represents a meaningful advancement in performance and cost over the device based on a triple-junction solar cell-electrocatalyst combination
URI
https://scholarworks.unist.ac.kr/handle/201301/18204
URL
http://pubs.acs.org/doi/abs/10.1021/acsnano.5b03859
DOI
10.1021/acsnano.5b03859
ISSN
1936-0851
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