Synthesis of mesoporous TiO2 spheres and aggregates by sol-gel method for dye-sensitized solar cells

Hui Tong, Naoya Enomoto, Miki Inada, Yumi Tanaka, Junichi Hojo

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Mesoporous microspheres of anatase TiO2 were synthesized by hydrolysis of titanium butoxide in butanol. The TiO2 micospheres were about 0.5 μm in size, composed of primary nanoparticles of about 10 nm, and the specific surface area increased by addition of triblock copolymer (Pluronic F127). TiO2 aggregates with irregular shape were formed by hydrothermal treatment. Before and after calcination, the crystallinity of TiO2 aggregates was high although the specific surface area decreased. The cell efficiency of TiO2 sphere electrode increased by F127 addition. Furthermore, TiO2 aggregate electrode exhibited an efficiency of 5.6%, which was much higher than those of TiO2 spheres with F127 and commercial TiO2 nanoparticles (P25) electrodes. It was confirmed that the high crystallinity of TiO2 was important to improve the photovoltaic properties as well as large surface area.

Original languageEnglish
Pages (from-to)259-262
Number of pages4
JournalMaterials Letters
Volume141
DOIs
Publication statusPublished - Feb 15 2015

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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