Polyfluorenes

Zhao, Qiang; Liu, Shujuan; Huang, Wei

doi:10.1002/9783527629787.ch9

Design and Synthesis of Conjugated Polymers 2010

DOI: 10.1002/9783527629787.ch9

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Polyfluorenes

Qiang Zhao¹,

Shujuan Liu²,

Wei Huang³

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2011

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Cited by 1 publication

References 231 publications

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A Series of Energy‐Transfer Copolymers Derived from Fluorene and 4,7‐Dithienylbenzotriazole for High Efficiency Yellow, Orange, and White Light‐Emitting Diodes

Zhang

Chen

et al. 2011

Adv Funct Materials

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Eight random and alternating copolymers PF-DTBTA derived from 2,7-fl uorene and 4,7-dithienylbenzotriazole (DTBTA) were synthesized. Thin solid fi lms of the energy-transfer copolymers possess high absolute photoluminescence (PL) quantum yields ( Φ PL ) between 60 − 72%. Inserting PVK layer between anode and emissive layer could show higher electroluminescence (EL) performances due to PVK-enhanced hole injection. Random copolymers PF-DTBTA1 − 15, with DTBTA molar contents from 1% to 15%, displayed yellow EL spectra with high external quantum effi ciency (EQE max ) up to 5.78%. PF-DTBTA50, the alternating copolymer, showed an orange EL with EQE max of 3.3%. The good Φ PL and EQE max of the PF-DTBTA50 with very high DTBTA content indicate that DTBTA is a high effi ciency chromophore with very low concentration quenching effects in the solid state PL and EL processes. PF-DTBTA0.03 − 0.1 could emit white EL due to partial energy transfer from fl uorene segments to DTBTA units. Moreover, white EL devices, with forward-viewing maximum luminous effi ciency up to 11 cd/A and stable white EL spectra (CIE coordinates of (0.33, 0.43)) in high current range from 5 mA to 60 mA, could be realized from the non-doped polymer with simple binary structure. Our results suggest that DTBTA has big potential to construct high performanced EL polymers or oligomers.

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A Series of Energy‐Transfer Copolymers Derived from Fluorene and 4,7‐Dithienylbenzotriazole for High Efficiency Yellow, Orange, and White Light‐Emitting Diodes

Zhang

Chen

et al. 2011

Adv Funct Materials

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Polyfluorenes

Cited by 1 publication

References 231 publications

A Series of Energy‐Transfer Copolymers Derived from Fluorene and 4,7‐Dithienylbenzotriazole for High Efficiency Yellow, Orange, and White Light‐Emitting Diodes

A Series of Energy‐Transfer Copolymers Derived from Fluorene and 4,7‐Dithienylbenzotriazole for High Efficiency Yellow, Orange, and White Light‐Emitting Diodes

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