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Conjugated donor–acceptor (D-A) copolymers are widely used in optoelectronic devices due to their influence on the resulting properties. This study focuses on the synthesis and characterization of the conjugated D-A copolymer constructed with fluorene and di-2-thienyl-2,1,3-benzothiadiazole units, resulting in Poly[2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4,7-di(2-thienyl)-2,1,3-benzothiadiazole)] (PFDTBT). The synthesis associated with reaction times of 48 and 24 h, the latter incorporating the phase-transfer catalyst Aliquat 336, was investigated. The modified conditions produced copolymers with higher molar masses (Mw > 20,000 g/mol), improved thermal stability and red emission at 649 nm. Furthermore, the resulting D-A copolymers exhibited uniform morphology with low surface roughness (P2—Ra: 0.77 nm). These improved properties highlight the potential of D-A copolymers based on PFDTBT for various optoelectronic applications, including photovoltaics, light-emitting devices, transistors and biological markers in the form of quantum dots.
Details
; Daniela Corrêa Santos 2
; Taihana Parente de Paula 2 ; de Morais, Andreia 3 ; Jilian Nei de Freitas 3 ; Maria de Fátima Vieira Marques 2
; Sergio Neves Monteiro 4
1 Center for Information Technology Renato Archer, (CTI Renato Archer), Rodovia D. Pedro I, Km 143, 6, Campinas 13069-901, SP, Brazil; Instituto de Macromoleculas Professora Eloisa Mano, IMA, Universidade Federal do Rio de Janeiro, IMA—UFRJ, Av. Horacio Macedo 2030, Rio de Janeiro 21941-598, RJ, Brazil
2 Instituto de Macromoleculas Professora Eloisa Mano, IMA, Universidade Federal do Rio de Janeiro, IMA—UFRJ, Av. Horacio Macedo 2030, Rio de Janeiro 21941-598, RJ, Brazil
3 Center for Information Technology Renato Archer, (CTI Renato Archer), Rodovia D. Pedro I, Km 143, 6, Campinas 13069-901, SP, Brazil
4 Military Institute of Engineering—IME, Department of Materials Science, Praça General Tibúrcio, 80, Urca, Rio de Janeiro 22290-270, RJ, Brazil