Photoelectrochemical properties of porous silicon based novel photoelectrodes

Overview

Title: 

Photoelectrochemical properties of porous silicon based novel photoelectrodes

Abstract: 

Porous silicon interfaces have been modified with nitrided TiO2 (TiON) nanoparticles to develop highly efficient photoelectrodes. Photoelectrodes were prepared by impregnating the electrochemically prepared porous silicon micro-channels with titanium oxynitride. Photocatalytic measurements were carried out on titanium oxynitride particles in water-methanol mixture and the results showed a dependence on the nitrogen concentration. Among the photoelectrodes used for photocurrent measurements, porous silicon impregnated with TiO2 nitrided at 600 degrees C showed maximum photocurrent increase after exposure to sunlight-type radiation. The enhancement in photocurrent was one order more for the porous silicon/titanium oxynitride hetero-structure than that of polished silicon/titanium oxynitride hetero-structure. Photoelectrodes thus prepared were found to have stable performance for a period of six months. This observation promises the possibility of using porous silicon/titanium oxynitride hetero-structures as efficient electrodes for photovoltaic cells. Copyright (C) 2010 John Wiley & Sons, Ltd.

Authors: 

C A Betty, R Sasikala, O D Jayakumar, T Sakuntala, A K Tyagi

DOI: 

Journal: 

Progress In Photovoltaics

Year: 

2011

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