Growth and Post-Deposition Treatments of SrTiO3 Films for Dye-Sensitized Photoelectrosynthesis Cell Applications

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• 作者：Robert W. Call ; Leila Alibabaei ; Robert J. Dillon ; Robin R. Knauf ; Animesh Nayak ; Jillian L. Dempsey ; John M. Papanikolas ; Rene Lopez
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：May 18, 2016
• 年：2016
• 卷：8
• 期：19
• 页码：12282-12290
• 全文大小：415K
• 年卷期：0
• ISSN：1944-8252

文摘

Sensitized SrTiO₃ films were evaluated as potential photoanodes for dye-sensitized photoelectrosynthesis cells (DSPECs). The SrTiO₃ films were grown via pulsed laser deposition (PLD) on a transparent conducting oxide (fluorine-doped tin oxide, FTO) substrate, annealed, and then loaded with zinc(II) 5,10,15-tris(mesityl)-20-[(dihydroxyphosphoryl)phenyl] porphyrin (MPZnP). When paired with a platinum wire counter electrode and an Ag/AgCl reference electrode these sensitized films exhibited photocurrent densities on the order of 350 nA/cm² under 0 V applied bias conditions versus a normal hydrogen electrode (NHE) and 75 mW/cm² illumination at a wavelength of 445 nm. The conditions of the post-deposition annealing step—namely, a high-temperature reducing atmosphere—proved to be the most important growth parameters for increasing photocurrent in these electrodes.