Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Kim, Se-Yun | - |
dc.contributor.author | Kim, Seung-Hyun | - |
dc.contributor.author | Hong, Sanghun | - |
dc.contributor.author | Son, Dae-Ho | - |
dc.contributor.author | Kim, Young-ill | - |
dc.contributor.author | Kim, Sammi | - |
dc.contributor.author | Ahn, Kwangseok | - |
dc.contributor.author | Yang, Kee-Jeong | - |
dc.contributor.author | Kim, Dae-Hwan | - |
dc.contributor.author | Kang, Jin-Kyu | - |
dc.date.accessioned | 2019-07-11T05:43:17Z | - |
dc.date.available | 2019-07-11T05:43:17Z | - |
dc.date.created | 2019-07-09 | - |
dc.date.issued | 2019-07 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/10115 | - |
dc.description.abstract | Recently, highly efficient CZTS solar cells using pure metal precursors have been reported, and our group created a cell with 12.6% efficiency, which is equivalent to the long-lasting world record of IBM. In this study, we report a new secondary phase formation mechanism in the back contact interface. Previously, CZTSSe decomposition with Mo has been proposed to explain the secondary phase and void formation in the Mo-back contact region. In our sulfo-selenization system, the formation of voids and secondary phases is well explained by the unique wetting properties of Mo and the liquid metal above the peritectic reaction (?-Cu6Sn5 → ϵ-Cu3Sn + liquid Sn) temperature. Good wetting between the liquid Sn and the Mo substrate was observed because of strong metallic bonding between the liquid metal and Mo layer. Thus, some ϵ-Cu3Sn and liquid Sn likely remained on the Mo layer during the sulfo-selenization process, and Cu-SSe and Cu-Sn-SSe phases formed on the Mo side. When bare soda lime glass (SLG) was used as a substrate, nonwetting adhesion was observed because of weak van der Walls interactions between the liquid metal and substrate. The Cu-Sn alloy did not remain on the SLG surface, and Cu-SSe and Cu-Sn-SSe phases were not observed after the final sulfo-selenization process. Additionally, Mo/SLG substrates coated with a thin Al2O3 layer (1-5 nm) were used to control secondary phase formation by changing the wetting properties between Mo and the liquid metal. A 1 nm Al2O3 layer was enough to control secondary phase formation at the CZTSSe/Mo and void/Mo interfaces, and a 2 nm Al2O3 layer was enough to perfectly control secondary phase formation at the Mo interface and Mo-SSe formation. © 2019 American Chemical Society. | - |
dc.language | English | - |
dc.publisher | American Chemical Society | - |
dc.title | Secondary Phase Formation Mechanism in the Mo-Back Contact Region during Sulfo-Selenization Using a Metal Precursor: Effect of Wettability between a Liquid Metal and Substrate on Secondary Phase Formation | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acsami.9b03969 | - |
dc.identifier.scopusid | 2-s2.0-85068192048 | - |
dc.identifier.bibliographicCitation | ACS Applied Materials & Interfaces, v.11, no.26, pp.23160 - 23167 | - |
dc.description.isOpenAccess | FALSE | - |
dc.subject.keywordAuthor | CZTSSe | - |
dc.subject.keywordAuthor | metal precursor | - |
dc.subject.keywordAuthor | Mo back contact | - |
dc.subject.keywordAuthor | secondary phase formation mechanism | - |
dc.subject.keywordAuthor | wettability | - |
dc.subject.keywordPlus | ZNO INTERMEDIATE LAYER | - |
dc.subject.keywordPlus | CU2ZNSNS4 SOLAR-CELLS | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | SULFURIZATION | - |
dc.subject.keywordPlus | ABSORBER | - |
dc.citation.endPage | 23167 | - |
dc.citation.number | 26 | - |
dc.citation.startPage | 23160 | - |
dc.citation.title | ACS Applied Materials & Interfaces | - |
dc.citation.volume | 11 | - |
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