期刊
JOURNAL OF POWER SOURCES
卷 274, 期 -, 页码 77-84出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.10.033
关键词
C3N4; TiO2 nanosheets; Modification; Dye-sensitized solar cells (DSSCs)
资金
- 973 program [2013CB632402]
- NSFC [51272199, 51320105001, 51372190, 21433007]
- General Financial Grant from the China Postdoctoral Science Foundation [2014M552101]
- Fundamental Research Funds for the Central Universities [WUT: 2014-VII-010, WUT: 2014-IV-058]
- Self-determined and Innovative Research Funds of SKLWUT [2013-ZD-1]
- WUT Start-Up Grant
Dye-sensitized solar cells (DSSCs) were fabricated by using g-C3N4 modified TiO2 nanosheets (CTS) as photoanode materials in this research. A thin layer of g-C3N4 was coated on the surface of TiO2 nanosheets by simply heating the mixture of TiO2 nanosheets and urea, which led to the formation of TiO2@g-C3N4 nanosheet heterostructure. The experimental results showed that the photoelectric conversion efficiency of DSSCs was obviously improved after modified by g-C3N4. The measurements of I-V characteristic indicated that the introduction of g-C3N4 could increase both the open circuit voltage and short-circuit photocurrent density. Along with the analysis of electrochemical impedance spectroscopy, it is considered that the thin layer of g-C3N4 can act as the blocking layer for electron backward recombination with electrolyte, which can be used as the functional material to increase the DSSC performance. (C) 2014 Elsevier B.V. All rights reserved.
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