Abstract
TiO2-NaYF4:Er3+/Yb3+-C3N4 composite photoanodes were successfully designed for the first time. The photoelectric conversion efficiency of TiO2-NaYF4:Er3+/Yb3+-C3N4 composite cell can result an efficiency of 7.37%, which is higher than those of pure TiO2 cell and TiO2-C3N4 composite cell. The enhancement of the efficiency can be attributed to the synergetic effect of NaYF4:Er3+/Yb3+ and C3N4. Electrochemical impedance spectroscopy analysis revealed that the interfacial resistance of the TiO2-dye I -3 /I− electrolyte interface of TiO2-NaYF4:Er3+/Yb3+-C3N4 composites cell was much smaller than that of pure TiO2 cell. In addition, the TiO2-NaYF4:Er3+/Yb3+-C3N4 composite cell had longer electron recombination time and shorter electron transport time than that of pure TiO2 cell.
摘要
本文首次成功设计并得到以TiO2-NaYF4:Er3+/Yb3+-C3N4复合材料作为光阳极的染料敏化太阳电池. 与纯TiO2和TiO2-C3N4电池相比, TiO2-NaYF4:Er3+/Yb3+-C3N4复合电池的效率明显提高. 研究表明, TiO2-NaYF4:Er3+/Yb3+-C3N4复合电池的TiO2-dye|I -3 /I−界面阻抗小于纯TiO2电 池. 此外TiO2-NaYF4:Er3+/Yb3+-C3N4电池具有更长的复合时间和更短的传输时间. 电池效率的提高归结于NaYF4:Er3+/Yb3+和g-C3N4的协同效应.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (21471050 and 21501052), the China Postdoctoral Science Foundation (2015M570304), the Postdoctoral Science Foundation of Heilongjiang Province (LBH-TZ06019), Heilongjiang Province Natural Science Foundation (ZD201301), and the Science Foundation for Excellent Youth of Harbin City of China (2016RQQXJ099).
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Mingqi Yu is currently amaster candidate at Heilongjiang University. She joined Professor Guofeng Wang’s research group in 2015, mainly working on dye-sensitized solar cells.
Guofeng Wang is a professor at the Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University. Her current research is focused on the synthesis and application of Ln3+-doped nanocrystals.
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Enhanced photoelectric conversion efficiency of dye-sensitized solar cells by the synergetic effect of NaYF4:Er3+/Yb3+ and g-C3N4
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Yu, M., Qu, Y., Pan, K. et al. Enhanced photoelectric conversion efficiency of dye-sensitized solar cells by the synergetic effect of NaYF4:Er3+/Yb3+ and g-C3N4 . Sci. China Mater. 60, 228–238 (2017). https://doi.org/10.1007/s40843-016-9006-4
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DOI: https://doi.org/10.1007/s40843-016-9006-4