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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• 作者：Jin Hyun Kim ; Yimhyun Jo ; Ju Hun Kim ; Ji Wook Jang ; Hyun Jun Kang ; Young Hye Lee ; Dong Suk Kim ; Yongseok Jun ; Jae Sung Lee
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：December 22, 2015
• 年：2015
• 卷：9
• 期：12
• 页码：11820-11829
• 全文大小：687K
• ISSN：1936-086X

文摘

A stand-alone, wireless solar water splitting device without external energy supply has been realized by combining in tandem a CH₃NH₃PbI₃ 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/cm² 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/cm² at 1.23 V_RHE) 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.