High Efficiency Dye-Sensitized Solar Cells Based on Hierarchically Structured Nanotubes
- 5 July 2011
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 11 (8), 3214-3220
- https://doi.org/10.1021/nl2014845
Abstract
Dye-sensitized solar cells (DSSCs) based on hierarchically structured TiO2 nanotubes prepared by a facile combination of two-step electrochemical anodization with a hydrothermal process exhibited remarkable performance. Vertically oriented, smooth TiO2 nanotube arrays fabricated by a two-step anodic oxidation were subjected to hydrothermal treatment, thereby creating advantageous roughness on the TiO2 nanotube surface (i.e., forming hierarchically structured nanotube arrays—nanoscopic tubes composed of a large number of nanoparticles on the surface) that led to an increased dye loading. Subsequently, these nanotubes were exploited to produce DSSCs in a backside illumination mode, yielding a significantly high power conversion efficiency, of 7.12%, which was further increased to 7.75% upon exposure to O2 plasma.This publication has 34 references indexed in Scilit:
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