Self-Assembly of ZnO-Nanorods and Its Performance in Quasi Solid Dye Sensitized Solar Cells
[摘要] Zinc oxide (ZnO) nanorods (NRs) were successfully prepared by self-assembly methods using zinc nitrate hexahydrate and hexamethylenetetramine as raw materials. ZnO-NRs were grown on FTO/ZnO seed layer and to enhance dye adsorption it was continued by deposition of titania (TiO2) paste by screen printing method. Deposition time of ZnO-NRs were varied, for 120, 150 and 180 minutes and subsequently stacked with one layer of TiO2mesoporous. The resulting heterojunction layers of FTO/ZnO-Nrs/TiO2was then applied as a photoanode in quasi-solid dye sensitized solar cell (QS- DSSC) with polymer gel electrolyte (PGE) as a hole conductor. UV-Vis spectrometer was used to investigate the changes of dye adsorption in photoanode with/without inserting titania mesoporous. Characterizations of scanning electron microscopy (SEM) and X-ray diffraction was carried out and the results shows that increasing the deposition time produces a smaller average grain size, diameter and denser layer of ZnO-nanorods. From current-voltage measurement, higher efficiency (η = 2.53%) was obtained for 120 min ZnO nanorods with short circuit current density (Jsc) of 2.84 mA/cm2and open circuit voltage (Voc) of 0.7 V. The combination of TiO2and ZnO-NRs shows a better performance in solar cells characteristics due to increases of dye adsorption on photoanode and high photogenerated electron transport rate. This work emphasizes an optimum condition of ZnO-NRs in combination with TiO2mesoporous as an alternative photoanode in QS-DSSC.
[发布日期] [发布机构] Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, JL. Raya Bandung-Sumedang KM 21., Jatinangor, West Java; 45363, Indonesia^1;Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, West Java; 40132, Indonesia^2
[效力级别] 物理学 [学科分类]
[关键词] Average grain size;Current voltage measurement;Optimum conditions;Photogenerated electrons;Polymer gel electrolytes;Screen printing methods;Self-assembly method;UV-vis spectrometer [时效性]
