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Control of Zn Content and Influence on Cu2ZnSnSe4 Thin-Film Solar Cells Fabricated by Coevaporation
- Control of Zn Content and Influence on Cu2ZnSnSe4 Thin-Film Solar Cells Fabricated by Coevaporation
- Jeon, Dong Hwan; Hwang, Dae Kue; Kang, Jin Kyu; Nam, Dahyun; Cheong, Hyeonsik
- DGIST Authors
- Hwang, Dae Kue; Kang, Jin Kyu
- Issue Date
- Journal of Nanoscience and Nanotechnology, 17(11), 8236-8241
- Article Type
- Absorber Layers; Characteristic X Rays; Co Evaporations; Coevaporation; Composition Dependence; Composition Dependence; Composition Ratio; Crystal Qualities; CZTSe Solar Cells; Rapid Thermal Process (RTP); Rapid Thermal Processing (RTP); Scanning Electron Microscopy (SEM); Secondary Phase; Semiconducting Selenium Compounds; Solar Cells; Texture Coefficient; Thin Film Solar Cells; Tin; X Ray Diffraction; X Ray Diffraction Analysis; Zinc (Zn); Zinc (Zn)
- The influence of the Zn content on the properties of a coevaporated Cu2ZnSnSe4 absorber layer was investigated. Cu2ZnSnSe4 (CZTSe) precursors deposited with various Zn composition ratios ([Zn]/[Sn] = 103, 1.06, 1,08, 1.17) were annealed using the rapid thermal process without any Se vapor pressure at 590 C to reduce the possibility of volatile SnSe loss. Scanning electron microscope observations showed that the grain size and surface morphology of the CZTSe absorber layer change depending on the Zn content. Furthermore, X-ray diffraction analyses were performed to determine the crystal quality of the CZTSe absorber layer in terms of the full width at half maximum of the characteristic X-ray diffraction peak and texture coefficient. Raman spectroscopy showed a ZnSe secondary phase in the CZTSe absorber layer with excess Zn. The CZTSe solar cell with the optimal Zn content ([Zn]/[Sn] = 106) exhibited a 6.11% conversion efficiency in a 0.42 cm2 active area. Copyright © 2017 American Scientific Publishers All rights reserved.
- American Scientific Publishers
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- Convergence Research Center for Solar Energy1. Journal Articles
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