• DocumentCode
    3726084
  • Title

    U-shape phenomenon in the efficiency-versus-current curves in AlGaN-based deep-ultraviolet light-emitting diodes

  • Author

    Jun Hyuk Park;Guan-Bo Lin;Dong Yeong Kim;Jong Won Lee;Jaehee Cho;E. Fred Schubert;Jong Kyu Kim

  • Author_Institution
    Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 790-784, Republic of Korea
  • Volume
    2
  • fYear
    2015
  • Firstpage
    1
  • Lastpage
    2
  • Abstract
    The efficiency of an AlGaN deep-ultraviolet light-emitting diode with peak emission wavelength of 285nm is investigated as a function of current over a wide range of temperatures (110K to 300K). We find that the efficiency-versus-current curve exhibits unique and distinct features over the entire temperature range including three points of inflection, a u-shape phenomenon which the efficiency increases again after the minimum, and higher low-temperature efficiency than room-temperature efficiency at high-current density regime.
  • Keywords
    "Light emitting diodes","Temperature distribution","Aluminum gallium nitride","Wide band gap semiconductors","Distance measurement","Charge carrier processes","Ionization"
  • Publisher
    ieee
  • Conference_Titel
    Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2015 11th Conference on
  • Type

    conf

  • DOI
    10.1109/CLEOPR.2015.7376076
  • Filename
    7376076
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3726084