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Optoelectronic properties of a novel fluorene derivative for organic light-emitting diode

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Abstract

We report the optoelectronic properties of a novel fluorene derivative of 6,6′-(9H-fluoren-9,9-diyl)bis(2,3-bis (9,9-dihexyl-9H-fluoren-2-yl)quinoxaline) (BFLBBFLYQ) used for organic light-emitting diode. UV–Vis absorption, photoluminescence (PL) and electroluminescence (EL) spectra of BFLBBFLYQ and the blend doped with N,N′-biphenyl-N,N′-bis-(3-methylphenyl)-1,1′-biphenyl-4,4′-di- amine (TPD) in solid state and in solution were investigated. The results showed that BFLBBFLYQ had a PL peak at 451 nm in solid and solution states and an EL peak at 483 nm with a broad emission band, resulting from fluorenone defects. Exciplex emission was observed in BFLBBFLYQ–TPD blend solid state with a green emission peaking at 530 nm. Also the blend in solution showed solvatochromism in polarity solvent upon UV irradiation. A new absorption band appeared at around 470 nm of BFLBBFLYQ–TPD blend in chloroform solution, and disappeared when diluted in absorption spectrum. Meanwhile, a low energy emission band from 530 to 580 nm appeared and increased with material concentration and UV irradiation time.

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Authors and Affiliations

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, People’s Republic of China

    Junsheng Yu, Shuangling Lou, Jincheng Qian & Yadong Jiang

  2. Department of Polymer Science, School of Chemistry and Chemical Technology, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China

    Qing Zhang

Authors
  1. Junsheng Yu
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  2. Shuangling Lou
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  3. Jincheng Qian
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  4. Yadong Jiang
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  5. Qing Zhang
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Correspondence to Junsheng Yu or Qing Zhang.

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Yu, J., Lou, S., Qian, J. et al. Optoelectronic properties of a novel fluorene derivative for organic light-emitting diode. Appl. Phys. A 94, 813–818 (2009). https://doi.org/10.1007/s00339-008-4846-y

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  • DOI: https://doi.org/10.1007/s00339-008-4846-y

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