Table of Contents
Journal of Nanoparticles
Volume 2013, Article ID 685836, 7 pages
http://dx.doi.org/10.1155/2013/685836
Research Article

Green Synthesis of Nanocrystalline Cu2ZnSnS4 Powder Using Hydrothermal Route

1Organic and Hybrid Solar Cell Group, National Physical Laboratory (CSIR), New Delhi 110 012, India
2Material & Chemical Microscopy Group, National Physical Laboratory (CSIR), New Delhi 110 012, India

Received 12 April 2013; Accepted 7 May 2013

Academic Editor: Amir Kajbafvala

Copyright © 2013 Shri kant Verma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanocrystalline Cu2ZnSnS4 (CZTS) powder was synthesized by a hydrothermal process, using thiourea as sulfur precursor. The powder was qualitatively analyzed using X-ray to identify the phase, and the size of the particles was determined using transmission electron microscopy (TEM). Raman peak at 337.5 cm−1 confirms the formation of pure CZTS particles. The powder was also synthesized solvothermally using ethylenediamine as solvent. The hydrothermally synthesized powder indicated the presence of the kesterite phase Cu2ZnSnS4 and particle size of about 4-5 nm. This environmentally green synthesis by hydrothermal route can produce gram scale synthesis of material with a chemical yield in excess of ~ 90%. UV Vis absorption spectra measurements indicated the band gap of as-synthesized CZTS nanoparticles to be 1.7 eV, which is near the optimum value for photovoltaic solar cell, showing its possible use in photovoltaics.