Enhanced Photocatalytic Performance Depending on Morphology of Bismuth Vanadate Thin Film Synthesized by Pulsed Laser Deposition

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• 作者：Sang Yun Jeong ; Kyoung Soon Choi ; Hye-Min Shin ; Taemin Ludvic Kim ; Jaesun Song ; Sejun Yoon ; Ho Won Jang ; Myung-Han Yoon ; Cheolho Jeon ; Jouhahn Lee ; Sanghan Lee
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：January 11, 2017
• 年：2017
• 卷：9
• 期：1
• 页码：505-512
• 全文大小：555K
• ISSN：1944-8252

文摘

We have fabricated high quality bismuth vanadate (BiVO₄) polycrystalline thin films as photoanodes by pulsed laser deposition (PLD) without a postannealing process. The structure of the grown films is the photocatalytically active phase of scheelite-monoclinic BiVO₄ which was obtained by X-ray diffraction (XRD) analysis. The change of surface morphology for the BIVO₄ thin films depending on growth temperature during synthesis has been observed by scanning electron microscopy (SEM), and its influence on water splitting performance was investigated. The current density of the BiVO₄ film grown on a glass substrate covered with fluorine-doped tin oxide (FTO) at 230 °C was as high as 3.0 mA/cm² at 1.23 V versus the potential of the reversible hydrogen electrode (V_RHE) under AM 1.5G illumination, which is the highest value so far in previously reported BiVO₄ films grown by physical vapor deposition (PVD) methods. We expect that doping of transition metal or decoration of oxygen evolution catalyst (OEC) in our BiVO₄ film might further enhance the performance.