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TiO 2 Nanospheres: A Facile Size‐Tunable Synthesis and Effective Light‐Harvesting Layer for Dye‐Sensitized Solar Cells
Author(s) -
Wang Shuan,
Ding Yong,
Xu Sichao,
Zhang Yunxia,
Li Guanghai,
Hu Linhua,
Dai Songyuan
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201304963
Subject(s) - materials science , amorphous solid , hydrothermal circulation , dye sensitized solar cell , layer (electronics) , chemical engineering , energy conversion efficiency , nanotechnology , template , optoelectronics , chemistry , organic chemistry , electrode , engineering , electrolyte
A facile route to synthesize amorphous TiO 2 nanospheres by a controlled oxidation and hydrolysis process without any structure‐directing agents or templates is presented. The size of the amorphous TiO 2 nanospheres can be easily turned from 20 to 1500 nm by adjusting either the Ti species or ethanol content in the reaction solution. The phase structure of nanospheres can be controlled by hydrothermal treatment. The TiO 2 nanospheres show excellent size‐dependent light‐scattering effects and can be structured into a light‐harvesting layer for dye‐sensitized solar cells with a quite high power conversion efficiency of 9.25 %.