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Spontaneous growth of Au nanoparticles on to electrodeposited CdSe thin film for plasmonic enhanced photoelectrochemical water splitting

LIN CHEN1, JIANPING LI2, CHAOQUAN ZHOU1, WENYUAN ZHU2, HONGCHENG PAN1,*

Affiliation

  1. College of chemistry and bio engineering, Guilin University of Technology, Guilin 541004, China
  2. Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, Guilin 541004, China

Abstract

T his article presents a simple method for fabrication of Au CdSe thin films onto fluorine doped SnO 2 (FTO) conducting glass substrates . The method start s with electrodeposition of CdSe thin film s onto FTO substrates and followed by spontaneous growth of Au nanoparticles onto the CdSe surface in solutions containing AuCl 4 ions . X ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X ray (EDX) spectroscopy were used to investigate the Au CdSe thin films. This work demonstrates that introducing plasmonic Au n anoparticles into photochemical reaction can substantially enhance the photo response to the solar splitting of water. The Au CdSe/FTO photoelectrodes show an up to 7.5 fold enhancements of photocurrent density for photoelectrochemical water splitting, as compare to that of the bare CdSe /FTO electrode. The mechanisms of spontaneous growth of Au nanoparticles and plasmonic enhancement of the photocurrent are discussed..

Keywords

CdSe , Au nanoparticles, Spontaneous growth, Plasmon, Water splitting.

Citation

LIN CHEN, JIANPING LI, CHAOQUAN ZHOU, WENYUAN ZHU, HONGCHENG PAN, Spontaneous growth of Au nanoparticles on to electrodeposited CdSe thin film for plasmonic enhanced photoelectrochemical water splitting, Optoelectronics and Advanced Materials - Rapid Communications, 8, 11-12, November-December 2014, pp.1200-1204 (2014).

Submitted at: Aug. 20, 2014

Accepted at: Nov. 13, 2014