Issue 108, 2015

An annealing-free anatase TiO2 nanocrystal film as an electron collection layer in organic solar cells

Abstract

Anatase TiO2 film, which is traditionally fabricated by high-temperature annealing of TiOx precursors, has been widely used as an electron collection layer in photovoltaics. In order to avoid the undesired high temperature treatment, in this work, we developed a convenient and moderate procedure to fabricate anatase TiO2 nanocrystal films at room temperature. Ultrafine, clean and high-quality anatase TiO2 nanocrystals have been pre-prepared in a simple solvothermal route and subsequent spin-coating of the nanocrystal dispersion provides a well formed TiO2 nanocrystal film without any further thermal treatment. The characteristics of the TiO2 nanocrystal film, in terms of crystallization phase, film morphology, optical and electronic properties, have been carefully studied, and then a typical [ITO/TiO2/P3HT:PCBM/MoO3/Ag] inverted photovoltaic device using TiO2 nanocrystals as the ECL has been fabricated and exhibits a comparable power conversion efficiency (PCE) of 3.35% to that of the conventional device (3.39% PCE).

Graphical abstract: An annealing-free anatase TiO2 nanocrystal film as an electron collection layer in organic solar cells

Supplementary files

Article information

Article type
Paper
Submitted
21 Aug 2015
Accepted
14 Oct 2015
First published
14 Oct 2015

RSC Adv., 2015,5, 88973-88978

Author version available

An annealing-free anatase TiO2 nanocrystal film as an electron collection layer in organic solar cells

D. Li, Y. Chen, P. Du, Z. Zhao, H. Zhao, Y. Ma and Z. Sun, RSC Adv., 2015, 5, 88973 DOI: 10.1039/C5RA16932A

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