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SrTiO 3 /TiO 2 Hybridstructure as Photoanode in Dye‐Sensitized Solar Cell
Author(s) -
Wang YuShiuan,
Chen TingTing_,
Huang YiJen,
Huang TzuPing,
Lee YinYu,
Chiu HsinTien,
Lee ChiYoung
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201300284
Subject(s) - dye sensitized solar cell , photocurrent , chemistry , electrolyte , dielectric spectroscopy , photoelectrochemistry , x ray photoelectron spectroscopy , energy conversion efficiency , optoelectronics , solar cell , anode , semiconductor , electrochemistry , chemical engineering , nanotechnology , materials science , electrode , engineering
In dye‐sensitized solar cells (DSSCs), the charge recombination at the TiO 2 /dye/electrolyte interface greatly influences the photoelectron conversion efficiency. Hybrid semiconductor materials with matched band potentials are designed to reduce the charge recombination. In this study, SrTiO 3 /TiO 2 hybridstructure was synthesized by using TiO 2 nanoparticles as template in a hydrothermal, showing a negative shift in the flat band potential. The DSSC with the SrTiO 3 /TiO 2 anode exhibits an increased photovoltage and a reduced photocurrent. The suppression of charge recombination at the TiO 2 /dye/electrolyte interface was observed in the electrochemical impedance spectroscopy, causing an improvement in the photovoltage. However, the SrTiO 3 /TiO 2 system shows an obstructed electrons injection from the dye to SrTiO 3 /TiO 2 , limiting the photocurrent performance. The photoelectrochemical properties of the SrTiO 3 /TiO 2 system are discussed in detail herein.