title: Photodeposition of Ag2S on TiO2 nanorod arrays for quantum dot-sensitized solar cells.
abstract: 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-vis 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.
authors.affiliation: Center for Low-Dimensional Materials, Micro-nano Devices and System, Changzhou University, Changzhou, 213164, China. dingjn@cczu.edu.cn.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Hu
authors.forename: Jianning
authors.initials: J
authors.lastname: Ding
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Bai
authors.forename: Ningyi
authors.initials: N
authors.lastname: Yuan