Synthesis and Electron Transporting Properties of Polyfluorene-&lt;i&gt;graft&lt;/i&gt;-Polystyrene

Cheng, Jin; Kanehashi, Shinji; Ogino, Kenji

doi:10.2115/fiberst.2022-0009

Cited by 1 publication

(2 citation statements)

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“…These conclusions are similar to those we obtained through the graft copolymerization modification of PFO [ 25 ]. However, in contrast to graft copolymers, they exhibit stable blue light performance.…”

Section: Discussionsupporting

confidence: 92%

“…Furthermore, owing to the nonpolar nature of PSt, these modified conjugated polymers will retain their electronic performances because they can avoid introducing additional charge traps [ 24 ]. Our recent research has also discussed the introduction of PSt as a side chain in PFO, which promoted the crystalline properties of PFO and increased its electron-transporting properties [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Electron Transporting Properties of Diblock Copolymers Consisting of Polyfluorene and Polystyrene

Cheng,

Jiang,

Shan

et al. 2024

Materials

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Poly(9,9-di-n-octylfluorene) (PFO) is a promising material for polymer light-emitting diodes (PLEDs) due to its advantageous properties. To enhance its electron transporting capabilities, diblock polymers were synthesized by attaching polystyrene (PSt) chains of varying lengths to one end of the PFO molecule. In a comparative study with PFO homopolymer, the diblock polymers maintained similar thermal properties, absorption spectra, and photoluminescent stability, while exhibiting slightly deeper lowest unoccupied molecular orbital (LUMO) levels and higher crystallinity. Notably, diblock polymers with shorter polystyrene blocks demonstrated higher electron mobility than the PFO homopolymer and diblock polymers with excessively long polystyrene blocks. These findings suggest that the optimal chain length of the polystyrene block is crucial for maximizing electron mobility, thus offering valuable insights for designing high-performance PLED materials.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%