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Control of Zn Content and Influence on Cu2ZnSnSe4 Thin-Film Solar Cells Fabricated by Coevaporation

Title
Control of Zn Content and Influence on Cu2ZnSnSe4 Thin-Film Solar Cells Fabricated by Coevaporation
Authors
Jeon, Dong-HwanHwang, Dae-KueKang, Jin-KyuNam, DahyunCheong, Hyeonsik
DGIST Authors
Jeon, Dong-Hwan; Hwang, Dae-KueKang, Jin-Kyu
Issue Date
2017-11
Citation
Journal of Nanoscience and Nanotechnology, 17(11), 8236-8241
Type
Article
Article Type
Article
Keywords
Absorber LayersCharacteristic X RaysCo EvaporationsCoevaporationComposition DependenceComposition DependenceComposition RatioCrystal QualitiesCZTSe Solar CellsRapid Thermal Process (RTP)Rapid Thermal Processing (RTP)Scanning Electron Microscopy (SEM)Secondary PhaseSemiconducting Selenium CompoundsSolar CellsTexture CoefficientThin Film Solar CellsTinX Ray DiffractionX Ray Diffraction AnalysisZinc (Zn)Zinc (Zn)
ISSN
1533-4880
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/4745
DOI
10.1166/jnn.2017.15117
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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