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Phys. Mater."],"published-print":{"date-parts":[[2026,9,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Earth-abundant amorphous oxide semiconductors like Zn\u2013Sn\u2013O and Cu\u2013Sn\u2013O feature electrical conductivities that can be tuned over several orders of magnitude by adjusting the metal composition and oxygen content. This study investigates the element-specific local structure and amorphous nature of Zn\u2013Sn\u2013O and Cu\u2013Sn\u2013O thin films with varying Zn\/Sn and Cu\/Sn ratios, grown at different oxygen partial pressures by room temperature pulsed laser deposition. X-ray absorption spectroscopy was performed at the Zn, Cu and Sn\n                    <jats:italic>K<\/jats:italic>\n                    -edges, providing local coordination and structural parameters for each metal species by in-depth analysis of near edge and extended fine structures. Except for very high copper contents, all thin films are fully amorphous with no noticeable order beyond the first coordination shell. Zinc atoms keep a tetrahedral configuration with an average bond length slightly larger than that of crystalline ZnO. Tin atoms prefer an octahedral coordination similar to crystalline SnO\n                    <jats:inline-formula>\n                      <jats:tex-math>\n                        \n                      <\/jats:tex-math>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" overflow=\"scroll\">\n                        <mml:mrow>\n                          <mml:msub>\n                            <mml:mi\/>\n                            <mml:mrow>\n                              <mml:mn>2<\/mml:mn>\n                            <\/mml:mrow>\n                          <\/mml:msub>\n                        <\/mml:mrow>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    but with reduced average coordination number and slightly smaller average bond length. Copper atoms feature a CuO-like coordination with reduced average coordination number and bond length for high copper contents, while further reduction of these structural parameters for low copper contents indicates a broad distribution of local environments. The variability of the Zn\u2013O, Sn\u2013O and Cu\u2013O local building blocks is thus determined by the coordination flexibility of the respective metal, being small for zinc with only one stable oxide but large for tin and copper with two stable oxides at ambient conditions. The dominant effect of the metal composition on the electrical properties of the material is given by the changing fraction of Zn\u2013O, Cu\u2013O and Sn\u2013O building blocks. Undercoordinated tin atoms provide negative charge carriers, leading to increasing n-type conductivity with increasing tin content. In contrast, CuO-like environments promote p-type conductivity for Cu\u2013Sn\u2013O thin films with high enough copper contents.\n                  <\/jats:p>","DOI":"10.1088\/2515-7639\/ae6e73","type":"journal-article","created":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T22:51:42Z","timestamp":1778885502000},"page":"035001","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Coordination flexibility as key factor for variability of local structure in amorphous Zn\u2013Sn\u2013O and Cu\u2013Sn\u2013O thin films"],"prefix":"10.1088","volume":"9","author":[{"given":"Corvin","family":"Krohn","sequence":"first","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-1378-3270","authenticated-orcid":true,"given":"Arne","family":"J\u00f6rns","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6738-1598","authenticated-orcid":true,"given":"Sofie","family":"Vogt","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4501-7036","authenticated-orcid":true,"given":"Konrad","family":"Ritter","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandra","family":"Montag","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sergiu","family":"Levcenko","sequence":"additional","affiliation":[{"name":"Deutsches Elektronen-Synchrotron DESY"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7554-182X","authenticated-orcid":true,"given":"Marius","family":"Grundmann","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Holger","family":"von Wenckstern","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3688-7104","authenticated-orcid":true,"given":"Claudia S","family":"Schnohr","sequence":"additional","affiliation":[{"name":"Leipzig University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,6,1]]},"reference":[{"key":"jpmaterae6e73bib1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202503755","type":"journal-article","volume":"35","author":"Bao","year":"2025","journal-title":"Adv. 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