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- W4313201713 abstract "The dibenzothiophene-S,S-dioxide (SO) possess strong but unmatched electron-withdrawing ability when connected to a normally used donor. Here, to lower its electron-withdrawing ability, we synthesized a benzo[b]naphtho[1,2-d]thiophene-S,S-dioxide (NSO) electron-deficient acceptor by using a naphthalene ring to replace one of the benzene rings in the SO unit. The copolymers PPF-NSs and PPF-NSOs were synthesized by introducing the NSO and benzo[b]naphtho[1,2-d] thiophene (NS) unit into polyfluorene backbone. A systematic study was presented based on the copolymers from the aspect of theoretical calculation, photophysical properties, electrochemical properties, and electroluminescent properties. For the PPF-NSs film, intermolecular energy transfer should be the main mechanism of photoluminescence. Whereas, intramolecular charge transfer played the main role in the photoluminescence mechanism for PPF-NSOs film due to the existence of the strong electron-deficient group (NSO). The PPF-NSOs acquired superior blue emission with maximum luminous efficiency (LEmax) of 8.16 cd A−1 and a CIE of (0.16, 0.25) at a low acceptor concentration of 3%, while the copolymer (PPF-NS1) based on energy transfer also achieved a satisfactory performance with LEmax of 5.20 cd A−1 and a CIE of (0.17, 0.18)." @default.
- W4313201713 created "2023-01-06" @default.
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- W4313201713 date "2023-02-01" @default.
- W4313201713 modified "2023-10-16" @default.
- W4313201713 title "Highly efficient blue light-emitting polymer containing a Benzo[b]naphtho[1,2-d]thiophene -S,S-dioxide unit" @default.
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- W4313201713 doi "https://doi.org/10.1016/j.dyepig.2022.111034" @default.
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