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A zero-thermal-quenching phosphor

Nature materials, 2017-05, Vol.16 (5), p.543-550 [Peer Reviewed Journal]

Copyright Nature Publishing Group May 2017 ;ISSN: 1476-1122 ;EISSN: 1476-4660 ;DOI: 10.1038/NMAT4843 ;PMID: 28191898

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  • Title:
    A zero-thermal-quenching phosphor
  • Author: Kim, Yoon Hwa ; Arunkumar, Paulraj ; Kim, Bo Young ; Unithrattil, Sanjith ; Kim, Eden ; Moon, Su-Hyun ; Hyun, Jae Young ; Kim, Ki Hyun ; Lee, Donghwa ; Lee, Jong-Sook ; Im, Won Bin
  • Subjects: Displays ; Emission ; Energy transfer ; Exploration ; Illumination ; Light emitting diodes ; Luminescence ; Phosphors ; Phosphorus content ; Quenching
  • Is Part Of: Nature materials, 2017-05, Vol.16 (5), p.543-550
  • Description: Phosphor-converted white light-emitting diodes (pc-WLEDs) are efficient light sources used in lighting, high-tech displays, and electronic devices. One of the most significant challenges of pc-WLEDs is the thermal quenching, in which the phosphor suffers from emission loss with increasing temperature during high-power LED operation. Here, we report a blue-emitting Na Sc (PO ) :xEu phosphor (λ = 453 nm) that does not exhibit thermal quenching even up to 200 °C. This phenomenon of zero thermal quenching originates from the ability of the phosphor to compensate the emission losses and therefore sustain the luminescence with increasing temperature. The findings are explained by polymorphic modification and possible energy transfer from electron-hole pairs at the thermally activated defect levels to the Eu 5d-band with increasing temperature. Our results could initiate the exploration of phosphors with zero thermal quenching for high-power LED applications.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 1476-1122
    EISSN: 1476-4660
    DOI: 10.1038/NMAT4843
    PMID: 28191898
  • Source: ProQuest Central
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