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The primary challenge lies in simultaneous enhancements for the electronic charge associated external quantum efficiencies (EQEs) and spin\u2010dependent dissymmetry factor of circularly polarized electroluminescence (\n                    <jats:italic>g<\/jats:italic>\n                    <jats:sub>EL<\/jats:sub>\n                    ), which severely limits the high\u2010performance spin\u2010LEDs\u2019 development. Herein, a self\u2010assembled monolayer (SAM) that acts as an interfacial layer between a nickel oxide (NiO\n                    <jats:sub>x<\/jats:sub>\n                    ) transport layer and a chiral perovskite emissive film has been adopted for red spin\u2010LED fabrications. An optimal EQE of 8.3% and\n                    <jats:italic>g<\/jats:italic>\n                    <jats:sub>EL<\/jats:sub>\n                    of 16.3% have been successfully achieved for the red circularly polarized electroluminescence (CPEL) at 725\u00a0nm. From the spin\u2010optoelectronic consideration, the well\u2010balanced EQE and\n                    <jats:italic>g<\/jats:italic>\n                    <jats:sub>EL<\/jats:sub>\n                    . These are attributed to remarkable fluorescence recombination lifetime improvements, ion migration suppressions, and trap density reductions. Notably, a two times greater spin lifetime (\u224827.6\u00a0ps) has been obtained by comparing with a control sample (\u224812.1\u00a0ps). Improved chiral\u2010induced spin\u2010orbit coupling (CISOC) strengths further elevate spin\u2010selective capacities, which consequently promote polarized spin current generation. This study unlocks the challenge and opens a new avenue for constructing high\u2010performance spin\u2010LEDs using the SAM nanotechnology.\n                  <\/jats:p>","DOI":"10.1002\/advs.202512057","type":"journal-article","created":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T13:20:11Z","timestamp":1761312011000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Self\u2010Assembled Monolayers Facilitate Simultaneous Enhancements of External Quantum Efficiencies and Circularly Polarized Luminescence Dissymmetry Factors for Chiral Perovskite Red Spin\u2010Light Emitting Diodes"],"prefix":"10.1002","volume":"13","author":[{"given":"Linze","family":"Jiang","sequence":"first","affiliation":[{"name":"Key Laboratory of Luminescence and Optical Information Ministry of Education School of Physical Science and Engineering Beijing Jiaotong University  Beijing 100044 P. R. 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