{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,11]],"date-time":"2026-10-11T02:32:00Z","timestamp":1791685920586,"version":"4.3.4"},"reference-count":28,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2026,6,16]],"date-time":"2026-06-16T00:00:00Z","timestamp":1781568000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100016316","name":"Changzhou Vocational Institute of Engineering","doi-asserted-by":"crossref","award":["11130800225001"],"award-info":[{"award-number":["11130800225001"]}],"id":[{"id":"10.13039\/501100016316","id-type":"DOI","asserted-by":"crossref"}]},{"award":["11130800225001"],"award-info":[{"award-number":["11130800225001"]}],"id":[{"id":"https:\/\/ror.org\/03pza9p08","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Micromachines"],"abstract":"<jats:p>Poly(9,9-di-n-octylfluorene) (PFO) applications are limited by green emission defects and imbalanced charge transport. To overcome this, novel branched polystyrene-graft-polyfluorene (PSt-g-PFO) copolymers with varying grafting densities were synthesized. The highly branched architecture induces intense steric hindrance, acting as a physical shield to isolate PFO emissive cores. This successfully suppresses detrimental interchain \u03c0\u2013\u03c0 stacking, mitigating the ~530 nm green emission. Furthermore, the moderately grafted PSt-g-PFO2 promotes locally ordered crystalline packing, achieving a maximum electron mobility of 6.16 \u00d7 10\u22126 cm2\/(V\u00b7s), an order of magnitude higher than linear PFO. This structural design effectively decouples deleterious aggregation from charge transport.<\/jats:p>","DOI":"10.3390\/mi17060728","type":"journal-article","created":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T05:56:31Z","timestamp":1781675791000},"page":"728","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Synthesis and Optoelectronic Properties of Branched Polystyrene-graft-Polyfluorene Copolymers"],"prefix":"10.3390","volume":"17","author":[{"given":"Chuan","family":"Chen","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering and New Material, Changzhou Vocational Institute of Engineering, Changzhou 213164, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruoyu","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering and New Material, Changzhou Vocational Institute of Engineering, Changzhou 213164, China"},{"name":"Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1827-542X","authenticated-orcid":false,"given":"Changchun","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering and New Material, Changzhou Vocational Institute of Engineering, Changzhou 213164, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0004-9954-205X","authenticated-orcid":false,"given":"Pirada","family":"Sudprasert","sequence":"additional","affiliation":[{"name":"Faculty of Science and Technology, Rajamangala University of Technology Tawan-ok, Chonburi 20110, Thailand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-3097-0633","authenticated-orcid":false,"given":"Hong","family":"Sun","sequence":"additional","affiliation":[{"name":"Zhejiang Fenghong New Material Co., Ltd., Huzhou 313300, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guping","family":"Tang","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Zhejiang University, Hangzhou 310028, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering and New Material, Changzhou Vocational Institute of Engineering, Changzhou 213164, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9938-6748","authenticated-orcid":false,"given":"Kenji","family":"Ogino","sequence":"additional","affiliation":[{"name":"Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"7416","DOI":"10.1021\/ja9615233","article-title":"Efficient photoluminescence and electroluminescence from a soluble polyfluorene","volume":"118","author":"Pei","year":"1996","journal-title":"J. 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