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However, the micro\u2010devices exhibited inferior electroluminescent (EL) efficiency, which likely arose from the fact that effective surface reconstruction of the NCs is often impeded by challenges in defect management. In this work, we developed a phase\u2010transfer catalytic (PTC) strategy for the surface reconstruction of CsPbI\n                    <jats:sub>3<\/jats:sub>\n                    NCs, utilizing tetrabutylammonium iodide (TBAI) as a catalyst to mediate the incorporation of the solid\u2010phase ligand guanidinium iodide (GuI). The mechanism is rooted in a specific molecular interaction between TBAI and GuI, which disrupts the strong hydrogen\u2010bonding network of GuI molecules, effectively inhibits excessive GuI accumulation, and prevents micelle formation. As a result, the LEDs achieved peak external quantum efficiency (EQE) of 26.5% and exhibited more than a tenfold increase in operational lifetime. Furthermore, this methodology enabled the fabrication of high\u2010resolution micro\u2010LEDs with 1588 pixels per inch (PPI) and an EQE of 20.6%, which exhibiting bright and stable electroluminescence, further highlighting the versatility and scalability of the approach for advanced display technologies.\n                  <\/jats:p>","DOI":"10.1002\/adma.75122","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T06:26:12Z","timestamp":1789971972000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Phase\u2010Transfer Catalysis Toward Surface\u2010Reconstructed Perovskite Nanocrystals Enabling Efficient Perovskite LEDs and Micropatterns"],"prefix":"10.1002","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-9017-0277","authenticated-orcid":false,"given":"Mengqi","family":"Zhang","sequence":"first","affiliation":[{"name":"Institute for Advanced Materials and 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