Highly efficient and stable blue-light-emitting copolyfluorene consisting of carbazole, oxadiazole, and charge-trapping anthracene groups

Ruei Tang Chen, Wen Fen Su, Yun Chen

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This article presents the synthesis and electroluminescent (EL) properties of a stable blue-light-emitting copolyfluorene (P1) consisting of carbazole, oxadiazole and charge-trapping anthracene groups by Suzuki coupling reaction. The hole-transporting carbazole and electron-transporting oxadiazole improve charges injection and transporting properties, whereas the anthracene is the ultimate emitting chromophore. The thermal, photophysical, electrochemical, and EL properties of P1 were investigated by thermogravimetric analysis, differential scanning calorimeter, optical spectroscopy, cyclic voltammetry, and EL devices fabrication and characterization. P1 demonstrated high-thermal stability with thermal decomposition and glass tranistion temperatures above 400 and 145°C, respectively. In film state, P1 showed blue emission at 451 nm attributed to anthracene chromophore. Photophysical and electrochemical investigations demonstrate that effective energy transfer from fluorene to anthracene segments and charges trapping on anthracene segments leads to efficient and stable blue emission originating from anthracence. Polymer light-emitting diodes using P1 as the emitting layer (ITO/PEDOT:PSS/P1/Ca/Al) exhibited excellent current efficiency (5.1 cd/A) with the CIE coordinate being (0.16, 0.11). The results indicate that copolyfluorene is a promising candidate for the blue-emitting layer in the fabrication of efficient PLEDs.

Original languageEnglish
Pages (from-to)184-191
Number of pages8
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume49
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

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Oxadiazoles
Charge trapping
Anthracene
Chromophores
Fabrication
Luminescent devices
Charge injection
Calorimeters
Energy transfer
Cyclic voltammetry
Light emitting diodes
Thermogravimetric analysis
Polymers
Pyrolysis
Thermodynamic stability
carbazole
anthracene
Scanning
Glass
Electrons

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

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abstract = "This article presents the synthesis and electroluminescent (EL) properties of a stable blue-light-emitting copolyfluorene (P1) consisting of carbazole, oxadiazole and charge-trapping anthracene groups by Suzuki coupling reaction. The hole-transporting carbazole and electron-transporting oxadiazole improve charges injection and transporting properties, whereas the anthracene is the ultimate emitting chromophore. The thermal, photophysical, electrochemical, and EL properties of P1 were investigated by thermogravimetric analysis, differential scanning calorimeter, optical spectroscopy, cyclic voltammetry, and EL devices fabrication and characterization. P1 demonstrated high-thermal stability with thermal decomposition and glass tranistion temperatures above 400 and 145°C, respectively. In film state, P1 showed blue emission at 451 nm attributed to anthracene chromophore. Photophysical and electrochemical investigations demonstrate that effective energy transfer from fluorene to anthracene segments and charges trapping on anthracene segments leads to efficient and stable blue emission originating from anthracence. Polymer light-emitting diodes using P1 as the emitting layer (ITO/PEDOT:PSS/P1/Ca/Al) exhibited excellent current efficiency (5.1 cd/A) with the CIE coordinate being (0.16, 0.11). The results indicate that copolyfluorene is a promising candidate for the blue-emitting layer in the fabrication of efficient PLEDs.",
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AB - This article presents the synthesis and electroluminescent (EL) properties of a stable blue-light-emitting copolyfluorene (P1) consisting of carbazole, oxadiazole and charge-trapping anthracene groups by Suzuki coupling reaction. The hole-transporting carbazole and electron-transporting oxadiazole improve charges injection and transporting properties, whereas the anthracene is the ultimate emitting chromophore. The thermal, photophysical, electrochemical, and EL properties of P1 were investigated by thermogravimetric analysis, differential scanning calorimeter, optical spectroscopy, cyclic voltammetry, and EL devices fabrication and characterization. P1 demonstrated high-thermal stability with thermal decomposition and glass tranistion temperatures above 400 and 145°C, respectively. In film state, P1 showed blue emission at 451 nm attributed to anthracene chromophore. Photophysical and electrochemical investigations demonstrate that effective energy transfer from fluorene to anthracene segments and charges trapping on anthracene segments leads to efficient and stable blue emission originating from anthracence. Polymer light-emitting diodes using P1 as the emitting layer (ITO/PEDOT:PSS/P1/Ca/Al) exhibited excellent current efficiency (5.1 cd/A) with the CIE coordinate being (0.16, 0.11). The results indicate that copolyfluorene is a promising candidate for the blue-emitting layer in the fabrication of efficient PLEDs.

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