Point defects, compositional fluctuations, and secondary phases in non-stoichiometric kesterites
- 주제(키워드) kesterites , point defects , stoichiometry deviations , secondary phases , diffraction , Raman spectroscopy , Kelvin probe force
- 주제(기타) Energy & Fuels
- 주제(기타) Materials Science, Multidisciplinary
- 설명문(일반) [Schorr, Susan; Gurieva, Galina] Helmholtz Zentrum Berlin Fuer Materialien & Energ, Dept Struct & Dynam Energy Mat, Hahn Meitner Pl 1, D-14109 Berlin, Germany; [Schorr, Susan] Free Univ Berlin, Inst Geosci, Malteserstr 74-100, D-12449 Berlin, Germany; [Guc, Maxim; Dimitrievska, Mirjana; Perez-Rodriguez, Alejandro; Izquierdo-Roca, Victor] Catalonia Inst Energy Res IREC, Jardins Dones Negre 1, Sant Adria De Besos 08930, Spain; [Guc, Maxim] Inst Appl Phys, Academiei Str 5, ND-2023 Kishinev 5, Moldova; [Dimitrievska, Mirjana] Natl Inst Stand & Technol, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA; [Dimitrievska, Mirjana] Natl Renewable Energy Lab, Golden, CO 80401 USA; [Perez-Rodriguez, Alejandro] Univ Barcelona, Dept Engn Elect & Biomed, IN2UB, C Marti & Franques 1, Barcelona 08028, Spain; [Schnohr, Claudia S.] Univ Leipzig, Felix Bloch Inst Solid State Phys, Linnestr 5, D-04103 Leipzig, Germany; [Kim, Juran; Jo, William] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Manuel Merino, Jose] Univ Autonoma Madrid, Fac Sci, Ciudad Univ Cantoblanco C, Madrid 28049, Spain
- 등재 SCIE
- OA유형 Green Published, gold
- 발행기관 IOP PUBLISHING LTD
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000182506
- 본문언어 영어
- Published As http://dx.doi.org/10.1088/2515-7655/ab4a25
초록/요약
The efficiency of kesterite-based solar cells is limited by various non-ideal recombination paths, amongst others by a high density of defect states and by the presence of binary or ternary secondary phases within the absorber layer. Pronounced compositional variations and secondary phase segregation are indeed typical features of non-stoichiometric kesterite materials. Certainly kesterite-based thin film solar cells with an off-stoichiometric absorber layer composition, especially Cu-poor/Zn-rich, achieved the highest efficiencies, but deviations from the stoichiometric composition lead to the formation of intrinsic point defects (vacancies, anti-sites, and interstitials) in the kesterite-type material. In addition, a non-stoichiometric composition is usually associated with the formation of an undesirable side phase (secondary phases). Thus the correlation between off-stoichiometry and intrinsic point defects as well as the identification and quantification of secondary phases and compositional fluctuations in non-stoichiometric kesterite materials is of great importance for the understanding and rational design of solar cell devices. This paper summarizes the latest achievements in the investigation of identification and quantification of intrinsic point defects, compositional fluctuations, and secondary phases in non-stoichiometric kesterite-type materials.
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