Organic-free Anatase TiO2Paste for Efficient Plastic Dye-Sensitized Solar Cells and Low Temperature Processed Perovskite Solar Cells

Nianqing Fu, Chun Huang, Yan Liu, Xing Li, Wei Lu, Li Min Zhou, Feng Peng, Yanchun Liu, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)

Abstract

Recently, the synthesis of fine TiO2paste with organic-free binder emerged as an indispensable technique for plastic photovoltaics due to the low temperature processing requirement. In this study, pure anatase TiO2nanoparticles and organic-free TiO2-sol were successfully synthesized individually in organic-free solution. By mixing the pure anatase TiO2with the newly developed TiO2-sol binder, mechanically robust and well-interconnected TiO2films were prepared via UV-irradiation at low temperature for applications in plastic dye-sensitized solar cells (p-DSSCs). The structural, electrical, and photovoltaic properties of the films as well as the devices were investigated by various techniques. The dye-loading amount of the obtained film is 2.6 times that of the P25 electrodes. As revealed by electrochemical impedance spectroscopy results, the film derived from the as-prepared anatase TiO2paste (A-TiO2) exhibits much smaller charge transport resistance and lower electron recombination rate than the P25 film, while the introduction of TiO2-sol into the paste can further remarkably decrease the resistance of the produced film (AS-TiO2). The p-DSSCs employing AS-TiO2photoanode yield a high efficiency up to 7.51%, which is 86% higher than the P25 reference cells and also 31% higher than the A-TiO2cell. As a proof of concept, the newly developed AS-TiO2paste was also applied to low temperature processed perovskite solar cells (PSCs), and a promising high efficiency up to 9.95% was achieved.
Original languageEnglish
Pages (from-to)19431-19438
Number of pages8
JournalACS Applied Materials and Interfaces
Volume7
Issue number34
DOIs
Publication statusPublished - 18 Aug 2015

Keywords

  • anatase TiO 2
  • low temperature
  • organic-free
  • perovskite solar cells
  • plastic dye-sensitized solar cells
  • TiO -sol 2

ASJC Scopus subject areas

  • Materials Science(all)

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