CTS thin films have been prepared by

AcknowledgementsThis subject was supported by the National Natural Science Foundation (Grant Nos. 51171149 and 51371141), the National Science Technology Supporting Program of China (Grant No. 2012BAE06B02).
Semiconductors; Thin films; Vapor deposition; Crystal structure; Optical properties; X-ray diffraction
1. Introduction
The search of new absorbent materials that are cheap, non-toxic, with suitable optical and electrical properties for use as photovoltaic thin films, is one of the challenges for researchers in the last years. One of these compounds is Cu2SnS3 (CTS), which exhibits a Vitamin A coefficient of 104 cm−1, similar to other absorbers such as Cu(In,Ga)Se2 (CIGS) [1]. CTS belongs to the family of semiconductor chalcogenides with general formula I2–IV–VI3[2]. This material is a p-type semiconductor [3] and luteinizing hormone (LH) can crystallize in different crystal systems such as cubic, tetragonal, monoclinic that affects the values of the band gap ranging from 0.9 eV to 1.77 eV, where 0.9–1.75 eV has been measured for a cubic phase and 1.35 eV for the tetragonal phase [4]. Their study is a result of their formation as byproduct in the synthesis of Cu2ZnSnS4 (CZTS) [5] and [6].