Effect of compact structure on the phase transition in the oxides derived Cu2ZnSnSe4 thin films |
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| Affiliation: | 1. School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China;2. Institute for Solar Energy Systems, Guangdong Provincial Key Laboratory of Photovoltaic Technology, School of Physics, Sun Yat-sen University, Guangzhou 510006, China;1. School of Information and Communications, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, South Korea;2. Optoelectronics Convergence Research Center, Department of material Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea;3. Photovoltaic Research Group, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, South Korea;1. College of Physics and Information Engineering, and Institute of Micro-Nano Devices and Solar Cells, Fuzhou University, Fuzhou 350108, PR China;2. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou 213164, PR China;3. Institute of Advanced Photovoltaics, Fujian Jiangxia University, Fuzhou 350108, PR China;4. The Key Laboratory for Special Functional Materials of MOE, Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, Henan 475004, PR China |
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| Abstract: | Cu2ZnSnSe4 (CZTSe) films were prepared by selenization of oxides nanoparticles. A novel densification method was performed to improve the grain size and morphology of the CZTSe films. From absorption spectroscopy measurement, it was also found that the compressed CZTSe films showed Kesterite structure with a band gap of 0.92 eV, while the untreated CZTSe films showed partially disordered Kesterite structure with a band gap of 0.86 eV. The phase transition during the selenization of oxides nanoparticles is affected significantly by the compact density. The nucleation and growth of Kesterite phase is considered to be facilitated by the mass transfer around the particle contacts. The different characterization techniques show that the dense CZTSe layer with very large grain size can be achieved by using compression method. |
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| Keywords: | CZTSe Thin films Compress Solar energy materials |
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