All　inorganic　CsPbBr3　perovskite　is　a　promising　emissio　n　material　for　high-performance　lighting　and　display　appl　ications,　but　its　poor　stability　and　sensitivity　to　moisture　and　oxygen　hinder　commercialization.　Packaging　perovsk　ite　quantum　dots　(PQDs)　in　organosilicon　matrices　offers　an　effective　way　to　enhance　stability.　In　this　work,　we　replaced　traditional　oleic　acid　ligands　with　bromopropion　ic　acid.　The　Pb-Br　formed　can　fill　bromine　vacancies,　i　mproving　luminescence.　The　carboxyl　group　(-COOH)　in　bromopropionic　acid　releases　protons　(H+)　and　catalyze　s　the　polymerization　of　octamethylcyclotetrasiloxane　(D　4),　forming　a　silicone　coating　on　the　PQDs.　Additionally,　oxygen　in　silicones　bonds　with　Pb,　passivating　defects.　The　resulting　CsPbBr3/silicon　composite　shows　a　1.8　tim　es　increase　in　photoluminescence　quantum　yield　(PLQY)　and　significantly　improved　stability.　This　optimized　com　posite　material　demonstrates　strong　potential　for　use　as　c　olor　converters　in　lighting　and　display　applications,　enha　ncing　the　performance　and　stability　of　optoelectronic　dev　ices.　©　2025,　John　Wiley　and　Sons　Inc.　All　rights　reserved.