Synthesis and characterization of the Cu2ZnSnS4 system for photovoltaic applications

[摘要] This paper focuses on the synthesis and characterization of a ceramic material based on the Cu2ZnSnS4system, through the implementation of a hydrothermal route. For this purpose, we started from nitrate dissolutions in a 1.0mol L-1concentration, which were mixed and treated in a teflon lined vessel steel at 280°C for 48h. The Physicochemical characterization of the solid was evaluated by means of ultraviolet visible spectroscopy (UV-VIS), X-ray diffraction (XRD), Raman spectroscopy, scanning and transmission electron microscopy (SEM-TEM) and solid state impedance spectroscopy (IS). The initial characterization through UV measurements confirms a Band-gap around 1.46eV obtained by the Kubelka-Munk method, which demonstrates the effectiveness of the synthesis method in the obtaining of a semiconductor material. The XRD results confirm the obtaining of a crystalline material of pure phase with tetragonal geometry and I-42m space group. The preferential crystalline orientation was achieved along (2 2 0) facet, with crystallite sizes of nanometric order (6.0nm). The morphological aspects evaluated by means electron microscopy, confirmed the homogeneity of the material, showing specifically a series of textural and surface properties of relevant importance. Finally, the electrical characterizations allow to validate the semiconductor behaviour of CZTS system for development of photovoltaic technologies.

[发布机构] Universidad Pedagógica y Tecnológica de Colombia (UPTC), Tunja, Colombia^1

[效力级别] 化学

[关键词] Crystalline orientations;Electrical characterization;Photovoltaic applications;Photovoltaic technology;Physico-chemical characterization;Scanning and transmission electron microscopy;Semiconductor behaviours;Synthesis and characterizations