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Novel Random Low‐Band‐Gap Fluorene‐Based Copolymers for Deep Red/Near Infrared Light‐Emitting Diodes and Bulk Heterojunction Photovoltaic Cells
Author(s) -
Xia Yangjun,
Luo Jie,
Deng Xianyu,
Li Xianzhen,
Li Dongyun,
Zhu Xuhui,
Yang Wei,
Cao Yong
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200500517
Subject(s) - copolymer , fluorene , materials science , electroluminescence , band gap , polymer solar cell , optoelectronics , light emitting diode , photochemistry , conjugated system , polymer chemistry , diode , energy conversion efficiency , polymer , chemistry , nanotechnology , composite material , layer (electronics)
Summary: Novel readily soluble random low‐band‐gap conjugated copolymers (PFO–DTTP, E g ≈ 1.77–2.00 eV) derived from 9,9‐dioctylfluorene (DOF) and 2,3‐dimethyl‐5,7‐dithien‐2‐yl‐thieno[3,4‐b]pyrazine (DTTP) were prepared. The solutions and the solid thin films of the copolymers absorbed light from 300–690 nm. Prototype photovoltaic cells from solid state composite films with the copolymer PFO–DTTP30 and [6,6]‐phenyl C 61 butyric acid methyl ester (PCBM) showed power conversion efficiencies up to 0.83% under an AM1.5 solar simulator (100 mW · cm −2 ). For electroluminescent devices, the emission peaks were around 734–780 nm. This indicates that the low band gap copolymers are promising materials for polymeric solar cells and deep red/near infrared light‐emitting diodes.Synthesis of novel low‐band‐gap fluorene‐based copolymer.