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Fill Factor Losses in Cu2ZnSn(SxSe1-x)4 Solar Cells: Insights from Physical and Electrical Characterization of Devices and Exfoliated Films
Tai K.F.1; Gunawan O.2; Kuwahara M.3; Chen S.1; Mhaisalkar S.G.1; Huan C.H.A.1; Mitzi D.B.4
2016-02-04
Source PublicationAdvanced Energy Materials
ISSN16146840 16146832
Volume6Issue:3
AbstractBesides the open circuit voltage (V) deficit, fill factor (FF) is the second most significant parameter deficit for earth-abundant kesterite solar cell technology. Here, various pathways for FF loss are discussed, with focus on the series resistance issue and its various contributing factors. Electrical and physical characterizations of the full range of bandgap (E = 1.0-1.5 eV) CuZnSn(SSe) (CZTSSe) devices, as well as bare and exfoliated films with various S/(S + Se) ratios, are performed. High intensity Suns-V measurement indicates a nonohmic junction developing in high bandgap CZTSSe. Grazing incidence X-ray diffraction, Raman mapping, field emission scanning electron microscopy, and X-ray photoelectron spectroscopy indicate the formation of Sn(S,Se), Mo(S,Se), and Zn(S,Se) at the high bandgap CZTSSe/Mo interface, contributing to the increased series resistance (R) and nonohmic back contact characteristics. This study offers some clues as to why the record-CZTSSe solar cells occur within a bandgap range centered around 1.15 eV and offers some direction for further optimization.
Keywordfill factors nonohmic back contact secondary phases formation series resistance solar cells
DOI10.1002/aenm.201501609
URLView the original
Language英語
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Cited Times [WOS]:58   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Nanyang Technological University
2.IBM Thomas J. Watson Research Center
3.Tokyo Ohka Kogyo Co., Ltd.
4.Duke University
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GB/T 7714
Tai K.F.,Gunawan O.,Kuwahara M.,et al. Fill Factor Losses in Cu2ZnSn(SxSe1-x)4 Solar Cells: Insights from Physical and Electrical Characterization of Devices and Exfoliated Films[J]. Advanced Energy Materials,2016,6(3).
APA Tai K.F.,Gunawan O.,Kuwahara M.,Chen S.,Mhaisalkar S.G.,Huan C.H.A.,&Mitzi D.B..(2016).Fill Factor Losses in Cu2ZnSn(SxSe1-x)4 Solar Cells: Insights from Physical and Electrical Characterization of Devices and Exfoliated Films.Advanced Energy Materials,6(3).
MLA Tai K.F.,et al."Fill Factor Losses in Cu2ZnSn(SxSe1-x)4 Solar Cells: Insights from Physical and Electrical Characterization of Devices and Exfoliated Films".Advanced Energy Materials 6.3(2016).
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