{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T08:00:08Z","timestamp":1790409608955,"version":"4.1.0"},"reference-count":56,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T00:00:00Z","timestamp":1790380800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T00:00:00Z","timestamp":1790380800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Commercial SnO\n                    <jats:sub>2<\/jats:sub>\n                    colloidal solutions are widely used as an electron transport layer (ETL) in perovskite solar cells (PSCs). However, their intrinsic strong alkalinity, required for colloidal stability, creates a high proton\u2010affinity SnO\n                    <jats:sub>2<\/jats:sub>\n                    \/perovskite interface that promotes deprotonation of formamidinium (FA\n                    <jats:sup>+<\/jats:sup>\n                    ) cations, destabilizing the perovskite lattice and accelerating nonradiative recombination. Herein, the coordination\u2010driven neutralization strategy was proposed by introducing a multidentate acidic molecule, 2\u2010phosphonobutane\u20101,2,4\u2010tricarboxylic acid (PBTC), to regulate commercial SnO\n                    <jats:sub>2<\/jats:sub>\n                    colloidal solutions. PBTC effectively neutralizes excessive OH\n                    <jats:sup>\u2212<\/jats:sup>\n                    while strongly coordinating with SnO\n                    <jats:sub>2<\/jats:sub>\n                    surface through its phosphonic and carboxylic groups, thereby reconstructing the surface chemistry environment and stabilizing the colloidal dispersion under near\u2010neutral conditions. This strategy reduces the density of defects in SnO\n                    <jats:sub>2<\/jats:sub>\n                    ETL, facilitating more efficient electron extraction and transport. More importantly, the resulting near\u2010neutral buried interface inhibits FA\n                    <jats:sup>+<\/jats:sup>\n                    deprotonation and mitigates non\u2010radiative recombination losses. Consequently, the optimized devices achieve a power conversion efficiency of 25.87%. The unencapsulated devices retain 94.18% of their initial efficiency after 1000\u00a0h under ISOS\u2010L\u20102I conditions and 90.85% after 300\u00a0h of ultraviolet illumination. This work presents a new strategy for synergistically regulating colloidal chemistry and interfacial reactions through multidentate coordination, offering a promising pathway toward highly efficient and stable PSCs.\n                  <\/jats:p>","DOI":"10.1002\/smll.75956","type":"journal-article","created":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T07:38:46Z","timestamp":1790408326000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Coordination\u2010Driven Neutralization of SnO\n                    <sub>2<\/sub>\n                    Colloids for Suppressing Buried Interfacial Deprotonation in Perovskite Solar Cells"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-6561-6935","authenticated-orcid":false,"given":"Wei","family":"Cheng","sequence":"first","affiliation":[{"name":"School of Chemistry Key Laboratory of Advanced Technologies of Materials (Ministry of Education) Southwest Jiaotong University  Chengdu People's Republic of China"},{"name":"Research Institute of Frontier Science Southwest Jiaotong University  Chengdu People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Wang","sequence":"additional","affiliation":[{"name":"Research Institute of Frontier Science Southwest Jiaotong University  Chengdu People's Republic of China"},{"name":"School of Materials Science and Engineering Key Laboratory of Advanced Technologies of Materials (Ministry of Education) Southwest Jiaotong University  Chengdu People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jia","family":"Kou","sequence":"additional","affiliation":[{"name":"Research Institute of Frontier Science Southwest Jiaotong University  Chengdu People's Republic of China"},{"name":"School of Materials Science and Engineering Key Laboratory of Advanced Technologies of Materials (Ministry of Education) Southwest Jiaotong 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