Spectroscopic ellipsometry study of Cu2ZnSn(SxSe1-x)4 bulk polycrystals

JOURNAL OF ALLOYS AND COMPOUNDS

卷:843

Article

Levcenko, Sergiu¹  Hajdeu-Chicarosh, Elena²  Serna, Rosalia³  Guc, Maxim^2,4  Victorov, Ivan A.^5,7  Nateprov, Alexandr²  Bodnar, Ivan V.⁵  Caballero, Raquel^5,6  Merino, Jose Manuel⁶  Arushanov, Ernest²  Leon, Maximo⁶ 

[1] Helmholtz Zentrum Berlin Mat & Energie, Dept Struct & Dynam Energy Mat, Hahn Meitner Pl, D-14109 Berlin, Germany

[2] Moldavian Acad Sci, Inst Appl Phys, Acad 5, MD-2028 Kishinev, Moldova

[3] CSIC, Inst Opt, Laser Proc Grp, Serrano 121, Madrid 28006, Spain

[4] Catalonia Inst Energy Res, IREC, C Jardins Dones Negre 1, Barcelona 08930, Spain

[5] Belarusian State Univ Informat & Radioelect, P Brovka 6, Minsk 220013, BELARUS

[6] Univ Autonoma Madrid, Dept Appl Phys M12, C Francisco Tomas y Valiente 7, Madrid 28049, Spain

[7] SunGa Ltd, Bolgarscaia 87, MD-6101 Ceadir Lunga, Moldova

关键词: Ellipsometry;    Polycrystals;    Kesterites;    Semiconductor compounds;    Optical spectroscopy;    Raman spectroscopy;   

DOI  :  10.1016/j.jallcom.2020.156013

来源: Elsevier

【 摘 要 】

The pseudo dielectric function of Cu2ZnSn(SxSe1-x)(4) [x = 0.35, 0.62, 0.81] bulk polycrystals is determined over the range 1.1-4.6 eV at room temperature from the analysis of spectroscopic ellipsometry data using the Adachi model. From the analysis, the lowest E-0 transition and high energy E-1A and E-1B transitions are clearly identified, and used to follow the evolution of the pseudo dielectric function as a function of the composition. It is shown that the fundamental E-0 and high energy E-1A transitions can be tuned by increasing the sulfur content over a range of 0.3 eV. These results show the potential of the kesterite compounds for the design of efficient tailored photovoltaic solar cells. (C) 2020 Elsevier B.V. All rights reserved.

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