https://scholars.lib.ntu.edu.tw/handle/123456789/391293
標題: | Catalytic and photoelectrochemical performances of Cu-Zn-Sn-Se thin films prepared using selenization of electrodeposited Cu-Zn-Sn metal precursors | 作者: | Shao, P.-W. Li, C.-T. Ho, K.-C. Cheng, K.-W. KUO-CHUAN HO |
關鍵字: | Counter electrode; Dye-sensitized solar cell; Electrodeposition; Photoelectrochemical | 公開日期: | 2015 | 卷: | 286 | 起(迄)頁: | 47-57 | 來源出版物: | Journal of Power Sources | 摘要: | Abstract In this study, Cu2ZnSnSe4 (CZTSe) films are deposited onto the fluorine-doped-tin-oxide-coated glass substrate via the selenization of electrodeposited Cu-Zn-Sn metal precursors in an acidic solution with the applied potential of -0.9 V vs. an Ag/AgCl electrode. X-ray diffraction patterns reveal that the samples are the quaternary tetragonal CZTSe phase. The thicknesses and direct band gaps of the samples are in the ranges of 2.3 to 2.7 μm and 0.95 to 1.02 eV, respectively. All samples are p-type semiconductors with carrier density, mobility and flat-band potential in the ranges of 3.88 × 1017 to 1.37 × 1018 cm-3, 10.31 to 12.6 cm2 V-1 s-1 and -0.01 V to -0.08 V vs. Ag/AgCl reference electrode, respectively. The sample with [Cu]/[Zn + Sn] and [Zn]/[Sn] molar ratios of 0.87 and 0.66, respectively, has a maximum photo-enhanced current density of 0.41 mA cm-2 at an applied bias of -0.5 V vs. an Ag/AgCl electrode in 0.5 M H2SO4 solution under illumination. The best photo-conversion efficiency of dye-sensitized solar cells using CZTSe with [Cu]/[Zn + Sn] and [Zn]/[Sn] molar ratios of 0.87 and 0.66, respectively, as the counter electrode was 7.98%. The results show the high quality CZTSe films have potentials in applications of photoelectrochemical water splitting and dye-sensitized solar cells. Crown Copyright © 2015 Published by Elsevier B.V. All rights reserved. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84925755810&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/391293 |
DOI: | 10.1016/j.jpowsour.2015.03.101 | SDG/關鍵字: | Carrier mobility; Dye-sensitized solar cells; Electrochemical electrodes; Electrochemistry; Electrodeposition; Electrodes; Energy gap; Nanocomposites; Oxide films; Semiconducting selenium compounds; Silver; Solar cells; Substrates; Tin; Tin oxides; X ray diffraction; Zinc; Counter electrodes; Flat band potential; Fluorine doped tin oxide; P type semiconductor; Photoelectrochemical performance; Photoelectrochemical water splitting; Photoelectrochemicals; Reference electrodes; Copper |
顯示於: | 化學工程學系 |
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