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Currently, the performance of green PeLEDs is primarily limited by low\u2010\n                    <jats:italic>n<\/jats:italic>\n                    phases and defects in perovskite films, which result in low carrier mobility and non\u2010radiative recombination. Herein, we propose a tri\u2010functional additive strategy to obtain high\u2010quality perovskite films by incorporating biocompatible salicylates (sodium salicylate (NaSA) and potassium salicylate (KSA)) into quasi\u20102D perovskite. This strategy demonstrates that the salicylate can passivate Pb defects through the coordination of C\u2550O with unsaturated Pb\n                    <jats:sup>2+<\/jats:sup>\n                    ions and suppress the low\u2010\n                    <jats:italic>n<\/jats:italic>\n                    phase formation via the interaction of the \u2500OH group with PEA\n                    <jats:sup>+<\/jats:sup>\n                    ions. Moreover, alkali metal ions (Na\n                    <jats:sup>+<\/jats:sup>\n                    or K\n                    <jats:sup>+<\/jats:sup>\n                    ) regulate the crystallization process and promote the radiative recombination. With such tri\u2010functionalization, the quasi\u20102D pure green PeLEDs with NaSA as additive achieved a maximum external quantum efficiency (EQE) of 22.06% with emission peak at 527\u00a0nm and a maximum luminance of 36785\u00a0cd\/m\n                    <jats:sup>2<\/jats:sup>\n                    . This work provides new insights into the role of multifunctional additives to enhance the electroluminescent performance of PeLEDs.\n                  <\/jats:p>","DOI":"10.1002\/smll.75011","type":"journal-article","created":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T09:02:21Z","timestamp":1785920541000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Multifunctional Additives With Dual Anions and Alkali Metal Cation for Efficient Perovskite Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"22","author":[{"given":"Qi","family":"Han","sequence":"first","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Han","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiang","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shilu","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruimin","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daizhe","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9684-662X","authenticated-orcid":false,"given":"Shiyong","family":"Gao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xueyin","family":"Sun","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Welding &amp; Joining of Materials and Structures Harbin Institute of Technology  Harbin China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9535-4076","authenticated-orcid":false,"given":"Wallace. 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