tailieunhanh - Effect of temperature on Cu2ZnSnS4 nanomaterial synthesized by hydrothermal approach

In this paper, we prepared CZTS nanoparticles by hydrothermal method and investigate the influence of hydrothermal temperature on the product. Raman scattering, X-ray diffraction, scanning electron microcopy, energy dispersive X-ray spectroscopy and diffusion reflective measurement were applied to characterize the products. The products are high quality nanocrystals of kesterite phase with uniform size which is applicable for solar absorber layer fabrication. | VNU Journal of Science: Mathematics – Physics, Vol. 34, No. 3 (2018) 55-60 Effect of Temperature on Cu2ZnSnS4 Nanomaterial Synthesized by Hydrothermal Approach Pham Thi Hong1, Nguyen Viet Tuyen1,*, Tran Thi Ha2, Ho Khac Hieu3 1 Faculty of Physics, VNU University of science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam Faculty of Basis Sciences, Hanoi University of Mining and Geology, Duc Thang, Tu Liem, Hanoi, Vietnam 3 Institute of Research and Development, Duy Tan University, 03 Quang Trung, Hai Chau, Da Nang, Vietnam 2 Received 26 July 2018 Revised 10 September 2018; Accepted 11 September 2018 Abstract: Cu2ZnSnS4 (CZTS) is a p-type semiconductor with high absorption coefficient and direct bandgap from 1 to eV, which is ideal for making absorber layer for solar cell. However, it is difficult to get single phase of CZTS due to the competitive formation of binary and ternary secondary phases. In this paper, we prepared CZTS nanoparticles by hydrothermal method and investigate the influence of hydrothermal temperature on the product. Raman scattering, X-ray diffraction, scanning electron microcopy, energy dispersive X-ray spectroscopy and diffusion reflective measurement were applied to characterize the products. The products are high quality nanocrystals of kesterite phase with uniform size which is applicable for solar absorber layer fabrication. Keywords: Cu2ZnSnS4, hydrothermal, kesterite, Raman. 1. Introduction CZTS material is a p-type semiconductor and with direct band gap of around eV which is an ideal value for absorber layer [1, 2]. Besides, CZTS material composes of four elements: copper, zinc, tin and sulfur, which are all non-toxic elements and available abundantly in the earth’s crust, so CZTS can help to reduce cost of solar cells in the market. Solar cells based on CZTS light absorber layer is a promising candidate with the hope of replacing CdTe, CIS, CIGS in the near future [3]. There are various methods for manufacturing CZTS .