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A New Layered Photocathode with Porous NiO Nanosheets: An Effective Candidate for p‐Type Dye‐Sensitized Solar Cells
Author(s) -
Qu Yang,
Zhou Wei,
Miao Xiaohuan,
Li Ying,
Jiang Le,
Pan Kai,
Tian Guohui,
Ren Zhiyu,
Wang Guofeng,
Fu Honggang
Publication year - 2013
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201300707
Subject(s) - photocathode , non blocking i/o , dye sensitized solar cell , materials science , dielectric spectroscopy , energy conversion efficiency , chemical engineering , porosity , electrochemistry , adsorption , solar cell , nanotechnology , optoelectronics , chemistry , composite material , electrolyte , electrode , organic chemistry , catalysis , physics , quantum mechanics , electron , engineering
Herein, with the purpose of improving the efficiency of p‐type dye‐sensitized solar cells (DSSCs), a new layered photocathode (LP) is fabricated from irregular overlapping wrinkled porous NiO nanosheets. The LP was sensitized by using a commonly used dye, coumarin 343(C343), and then assembled into p‐type DSSCs through coupling with a platinum photoanode. Photoelectochemical characterization showed that the LP cell exhibited a clearly enhanced power‐conversion efficiency (by a factor of 4) compared with a cell with a NiO‐nanoparticle photocathode (NP). This excellent performance could be attributed to the overlapping layered structure, which favored hole transport, as confirmed by electrochemical impedance spectroscopy, and to the large surface area of the porous NiO nanosheets, which were favorable for dye adsorption.