https://scholars.lib.ntu.edu.tw/handle/123456789/391285
標題: | Efficient titanium nitride/titanium oxide composite photoanodes for dye-sensitized solar cells and water splitting | 作者: | Li, C.-T. Li, S.-R. Chang, L.-Y. Lee, C.-P. Chen, P.-Y. Sun, S.-S. Lin, J.-J. Vittal, R. KUO-CHUAN HO JIANG-JEN LIN |
公開日期: | 2015 | 卷: | 3 | 期: | 8 | 起(迄)頁: | 4695-4705 | 來源出版物: | Journal of Materials Chemistry A | 摘要: | Efficient titanium nitride/titanium oxide (TiN/TiO2) composite photoanodes have been proposed for the use not only in dye-sensitized solar cells (DSSCs) but also for water splitting. When the TiN precursor films were sintered at 500 °C for 0.5 to 4 h, they were partially converted to crystalline TiO2 containing both rutile and anatase phases. For the DSSCs, higher TiN content in the photoanodes resulted in a more negative flat-band potential and higher conductivity but lower surface area for the dye adsorption; therefore, the increase in VOC and FF but the decrease in JSC value were observed. The best DSSC, with TiN/TiO2 composite photoanode annealed for 1 h, exhibited a power conversion efficiency of 7.27%, while the cell without TiN, i.e., the cell with a standard P25 photoanode, showed an efficiency of 7.02%. For the water splitting, higher TiN content in the photoanodes resulted in better triggering of the H2O electrolysis, but less photo-induced current response at UV light illumination. Considering the water splitting performance measured at AM 1.5G, the TiN/TiO2 composite photoanode annealed for 1 h showed the best photo-induced current density (Jpho) of 0.12 mA cm-2, as compared with that of the standard P25 film. With the TiN/TiO2 composite photoanode annealed for 1 h, both DSSCs and water splitting electrochemical devices achieved their best performance independently. © 2015 The Royal Society of Chemistry. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84922874643&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/391285 |
DOI: | 10.1039/c4ta05606j | SDG/關鍵字: | Annealing; Dye-sensitized solar cells; Nitrides; Oxide minerals; Sintering; Tin oxides; Titanium; Titanium compounds; Titanium dioxide; Titanium nitride; Titanium oxides; Crystalline-tio; Electrochemical devices; Flat band potential; Oxide composites; Photoinduced currents; Power conversion efficiencies; Rutile and anatase; UV-light illumination; Solar cells |
顯示於: | 化學工程學系 |
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