%0 Journal Article
%T Photodeposition of Ag2S on TiO2 nanorod arrays for quantum dot-sensitized solar cells
%A Hongwei Hu
%A Jianning Ding
%A Shuai Zhang
%A Yan Li
%A Li Bai and Ningyi Yuan
%J Nanoscale Research Letters
%D 2013
%I 
%R 10.1186/1556-276X-8-10
%X Ag2S quantum dots were deposited on the surface of TiO2 nanorod arrays by a two-step photodeposition. The prepared TiO2 nanorod arrays as well as the Ag2S deposited electrodes were characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscope, suggesting a large coverage of Ag2S quantum dots on the ordered TiO2 nanorod arrays. UV¨Cvis absorption spectra of Ag2S deposited electrodes show a broad absorption range of the visible light. The quantum dot-sensitized solar cells (QDSSCs) based on these electrodes were fabricated, and the photoelectrochemical properties were examined. A high photocurrent density of 10.25 mA/cm2 with a conversion efficiency of 0.98% at AM 1.5 solar light of 100 mW/cm2 was obtained with an optimal photodeposition time. The performance of the QDSSC at different incident light intensities was also investigated. The results display a better performance at a lower incident light level with a conversion efficiency of 1.25% at 47 mW/cm2.
%K Ag2S
%K Quantum dot-sensitized solar cell
%K Photodeposition
%K TiO2 nanorod
%U http://www.nanoscalereslett.com/content/8/1/10/abstract