title: One-step fabrication of large-area ultrathin MoS2 nanofilms with high catalytic activity for photovoltaic devices.
abstract: Here we report a facile one-step solution-phase process to directly grow ultrathin MoS2 nanofilms on a transparent conductive glass as a novel high-performance counter electrode for dye-sensitized solar cells. After an appropriate reaction time, the entire surface of the conductive glass substrate was uniformly covered by ultrathin MoS2 nanofilms with a thickness of only several stacked layers. Electrochemical impedance spectroscopy and cyclic voltammetry reveal that the MoS2 nanofilms possess excellent catalytic activity towards tri-iodide reduction. When used in dye-sensitized solar cells, the MoS2 nanofilms show an impressive energy conversion efficiency of 8.3%, which is higher than that of a Pt-based electrode and very promising to be a desirable alternative counter electrode. Considering their ultrathin thickness, superior catalytic activity, simple preparation process and low cost, the as-prepared MoS2 nanofilms with high photovoltaic performance are expected to be widely employed in dye-sensitized solar cells.
authors.affiliation: Key Laboratory of Mesoscopic Chemistry of MOE and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China. zhongjin@nju.edu.cn.
authors.forename: Jia
authors.initials: J
authors.lastname: Liang
authors.forename: Jia
authors.initials: J
authors.lastname: Li
authors.forename: Hongfei
authors.initials: H
authors.lastname: Zhu
authors.forename: Yuxiang
authors.initials: Y
authors.lastname: Han
authors.forename: Yanrong
authors.initials: Y
authors.lastname: Wang
authors.forename: Caixing
authors.initials: C
authors.lastname: Wang
authors.forename: Zhong
authors.initials: Z
authors.lastname: Jin
authors.forename: Gengmin
authors.initials: G
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Liu