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

Authors :
Jin Cheng
Ruoyu Jiang
Yuhua Shan
Hong Sun
Shinji Kanehashi
Kenji Ogino
Source :
Materials, Vol 17, Iss 11, p 2694 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

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.

Details

Language :
English
ISSN :
19961944
Volume :
17
Issue :
11
Database :
Directory of Open Access Journals
Journal :
Materials
Publication Type :
Academic Journal
Accession number :
edsdoj.7be320493fcd4ec6bb49b630d2469cd2
Document Type :
article
Full Text :
https://doi.org/10.3390/ma17112694