Open AccessEffects of Homogenization Scheme ofTiO 2
Author(s) -
Seigo Ito,
Kaoru Takahashi,
Shin-ich Yusa,
Takahiro Imamura,
Kenji Tanimoto
Publication year - 2012
Publication title -
international journal of photoenergy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 51
eISSN - 1687-529X
pISSN - 1110-662X
DOI - 10.1155/2012/405642
Subject(s) - nanocrystalline material , photocurrent , materials science , dispersity , nanoparticle , dielectric spectroscopy , grinding , ball mill , spectroscopy , chemical engineering , analytical chemistry (journal) , nanotechnology , electrode , electrochemistry , optoelectronics , composite material , polymer chemistry , chromatography , chemistry , physics , quantum mechanics , engineering
TiO2 porous electrodes have been fabricated for photoelectrodes in dye-sensitized solar cells (DSCs) using TiO2 screen-printing paste from nanocrystalline TiO2 powder dried from the synthesized sol. We prepared the TiO2 screen-printing paste by two different methods to disperse the nanocrystalline TiO2 powder: a “ball-milling route” and a “mortal-grinding route.” The TiO2 ball-milling (TiO2-BM) route gave monodisperse TiO2 nanoparticles, resulting in high photocurrent density (14.2 mA cm−2) and high photoconversion efficiency (8.27%). On the other hand, the TiO2 mortal-grinding (TiO2-MG) route gave large aggregate of TiO2 nanoparticles, resulting in low photocurrent density (11.5 mA cm−2) and low photoconversion efficiency (6.43%). To analyze the photovoltaic characteristics, we measured the incident photon-to-current efficiency, light absorption spectroscopy, and electrical impedance spectroscopy of DSCs
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