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CdS Quantum Dot-Sensitized Solar Cells Based on Nano-Branched TiO2 Arrays
Nanoscale Research Letters
  • Chang Liu, Shandong University
  • Yitan Li, Shandong University
  • Lin Wei, Shandong University
  • Cuncun Wu, Shandong University
  • Yanxue Chen, Shandong University
  • Liangmo Mei, Shandong University
  • Jun Jiao, Portland State University
Document Type
Article
Publication Date
3-4-2014
Subjects
  • Solar batteries -- Design and construction,
  • Quantum electronics,
  • Quantum dots,
  • Photovoltaic cells
Abstract
Nano-branched rutile TiO2 nanorod arrays were grown on F:SnO2 conductive glass (FTO) by a facile, two-step wet chemical synthesis process at low temperature. The length of the nanobranches was tailored by controlling the growth time, after which CdS quantum dots were deposited on the nano-branched TiO2 arrays using the successive ionic layer adsorption and reaction method to make a photoanode for quantum dot-sensitized solar cells (QDSCs). The photovoltaic properties of the CdS-sensitized nano-branched TiO2 solar cells were studied systematically. A short-circuit current intensity of approximately 7 mA/cm2 and a light-to-electricity conversion efficiency of 0.95% were recorded for cells based on optimized nano-branched TiO2 arrays, indicating an increase of 138% compared to those based on unbranched TiO2 nanorod arrays. The improved performance is attributed to a markedly enlarged surface area provided by the nanobranches and better electron conductivity in the one-dimensional, well-aligned TiO2 nanorod trunks
Description

Copyright 2014 Liu et al.; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.

DOI
10.1186/1556-276X-9-107
Persistent Identifier
http://archives.pdx.edu/ds/psu/11139
Citation Information
Liu et al.: CdS quantum dot-sensitized solar cells based on nano-branched TiO2 arrays. Nanoscale Research Letters 2014 9:107. doi:10.1186/1556-276X-9-107