{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T19:11:56Z","timestamp":1762542716874,"version":"build-2065373602"},"reference-count":34,"publisher":"Wiley","issue":"19","license":[{"start":{"date-parts":[[2017,9,12]],"date-time":"2017-09-12T00:00:00Z","timestamp":1505174400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemSusChem"],"published-print":{"date-parts":[[2017,10,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The primary advantages of halide perovskites for light\u2010emitting diodes (LEDs) are solution processability, direct band gap, good charge\u2010carrier diffusion lengths, low trap density, and reasonable carrier mobility. The luminescence in 3\u2009D halide perovskite thin films originates from free electron\u2010hole bimolecular recombination. However, the slow bimolecular recombination rate is a fundamental performance limitation. Perovskite nanoparticles could result in improved performance but processability and cumbersome synthetic procedures remain challenges. Herein, these constraints are overcome by tailoring the 3\u2009D perovskite as a near monodisperse nanoparticle film prepared through a one\u2010step in\u2005situ deposition method. Replacing methyl ammonium bromide (CH<jats:sub>3<\/jats:sub>NH<jats:sub>3<\/jats:sub>Br, MABr) partially by octyl ammonium bromide [CH<jats:sub>3<\/jats:sub>(CH<jats:sub>2<\/jats:sub>)<jats:sub>7<\/jats:sub>NH<jats:sub>3<\/jats:sub>Br, OABr] in defined mole ratios in the perovskite precursor proved crucial for the nanoparticle formation. Films consisting of the in\u2005situ formed nanoparticles displayed signatures associated with excitonic recombination, rather than that of bimolecular recombination associated with 3\u2009D perovskites. This transition was accompanied by enhanced photoluminescence quantum yield (PLQY\u224820.5\u2009% vs. 3.40\u2009%). Perovskite LEDs fabricated from the nanoparticle films exhibit a one order of magnitude improvement in current efficiency and doubling in luminance efficiency. The material processing systematics derived from this study provides the means to control perovskite morphologies through the selection and mixing of appropriate additives.<\/jats:p>","DOI":"10.1002\/cssc.201701067","type":"journal-article","created":{"date-parts":[[2017,8,23]],"date-time":"2017-08-23T06:32:38Z","timestamp":1503469958000},"page":"3818-3824","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Modulating Excitonic Recombination Effects through One\u2010Step Synthesis of Perovskite Nanoparticles for Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"10","author":[{"given":"Sneha A.","family":"Kulkarni","sequence":"first","affiliation":[{"name":"Energy Research Institute at Nanyang Technological University (ERI@N)  Research Techno Plaza, X-Frontier Bloc Level 5, 50 Nanyang Drive Singapore 637553 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Subas","family":"Muduli","sequence":"additional","affiliation":[{"name":"Energy Research Institute at Nanyang Technological University (ERI@N)  Research Techno Plaza, X-Frontier Bloc Level 5, 50 Nanyang Drive Singapore 637553 Singapore"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guichuan","family":"Xing","sequence":"additional","affiliation":[{"name":"Institute of Applied Physics and Materials Engineering University of Macau  Avenida da Universidade, Taipa Macau P. 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