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An efficient 2-linked carbazolyl β-diketonate europium(III) complex as red phosphor applied in LED

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Abstract

An efficient 2-linked carbazolyl β-diketonate europium(III) complex Eu(ETFMCTFBD)3phen was designed and synthesized, where ETFMCTFBD was 1-(9-ethyl-7-(trifluoromethyl)-9H-carbazol-2-yl)-4,4,4-trifluorobutane-1,3-dione and phen was 1,10-phenanthroline. Eu(ETFMCTFBD)3phen exhibits high thermal stability and excellent photoluminescence properties. The CIE chromaticity coordinates (x=0.668, y=0.331) are close to the National Television Standard Committee (NTSC) standard values for red. The lowest triplet energy was measured and suggests the photoluminescence process as a ligand-sensitized luminescence process (antenna effect). A bright red light-emitting diode was fabricated by coating the complex phosphor onto a ∼395 nm-emitting InGaN chip. All the results indicate that Eu(ETFMCTFBD)3phen is a good candidate as a red component in the fabrication of white LEDs with a high color-rendering index.

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Authors and Affiliations

  1. State Key Laboratory of Optoelectronic Materials and Technologies, Ministry of Education Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China

    P. He, H. H. Wang, S. G. Liu, J. X. Shi & M. L. Gong

  2. School of Chemistry Science and Technology, Zhanjiang Normal University, Development Center for New Materials Engineering and Technology in Universities of Guangdong, Zhanjiang, 524048, PR China

    S. G. Liu

Authors
  1. P. He
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  2. H. H. Wang
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  3. S. G. Liu
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  4. J. X. Shi
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  5. M. L. Gong
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Correspondence to M. L. Gong.

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He, P., Wang, H.H., Liu, S.G. et al. An efficient 2-linked carbazolyl β-diketonate europium(III) complex as red phosphor applied in LED. Appl. Phys. B 99, 757–762 (2010). https://doi.org/10.1007/s00340-010-3972-3

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  • DOI: https://doi.org/10.1007/s00340-010-3972-3

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