Journal
ACS NANO
Volume 9, Issue 12, Pages 11820-11829Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b03859
Keywords
dual doping; cobalt carbonate; BiVO4; perovskite solar cell; tandem cell; artificial leaf
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Funding
- Brain Korea Plus Program of Ministry of Education, Korea Center for Artificial Photosynthesis (KCAP) - MSIP [2009-0093880]
- MOTIE of Republic of Korea [10050509]
- Ulsan National Institute of Science and Technology
- National Research Council of Science & Technology (NST), Republic of Korea [KIER2-6] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0093880] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.
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