Journal
NANOSCALE
Volume 5, Issue 8, Pages 3481-3485Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr34059g
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Funding
- 973 Programs [2011CB933303, 2013CB632404]
- Jiangsu Provincial Funds for Distinguished Young Scientists [BK2012015]
- Fundamental Research Funds for the Central Universities [1113020401, 1115020405, 1116020406]
- NSFC [20971048, 50732004, 11174129]
- Jiangsu Provincial Science and Technology Research Program [BK2011056]
- China Postdoctoral Science Foundation [2012M521042]
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Enhanced photovoltaic performance of a DSSC using graphene-TiO2 photoelectrodes prepared by our recent in situ simultaneous reduction-hydrolysis technique (Adv. Funct. Mater., 2012, DOI: 10.1002/adfm.201202349, in press) was achieved. The DSSCs based on the G-TiO2 nanocomposites improved their overall energy conversion efficiency to 7.1%. The results prove that the promoting effect of graphene is strongly dependent on its content; namely, the efficiency of DSSCs increases and then decreases with increasing graphene content in TiO2-graphene composites. Excessive graphene in the nanocomposite leads to a decrease of the light harvest of dye molecules and thus a negative effect on the power conversion efficiency of DSSCs.
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