Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes

Tian, Pengfei and McKendry, Jonathan J. D. and Herrnsdorf, Johannes and Watson, Scott and Ferreira, Ricardo and Watson, Ian M. and Gu, Erdan and Kelly, Anthony E. and Dawson, Martin D. (2014) Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes. Applied Physics Letters, 105 (17). 171107. ISSN 0003-6951

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    Abstract

    Temperature-dependent trends in radiative and Auger recombination coefficients have been determined at different injection carrier concentrations using InGaN micro-light emitting diodes 40 μm in diameter. The differential lifetime was obtained first from the measured modulation bandwidth and was then employed to calculate the carrier concentration in the quantum well active region. When the temperature increases, the carrier concentration increases, but both the radiative and Auger recombination coefficients decrease. In addition, the temperature dependence of radiative and Auger recombination coefficients is weaker at a higher injection carrier concentration, which is strongly related to phase space filling.

    Author(s):Tian, Pengfei, McKendry, Jonathan J. D. ORCID logoORCID: https://orcid.org/0000-0002-6379-3955, Herrnsdorf, Johannes ORCID logoORCID: https://orcid.org/0000-0002-3856-5782, Watson, Scott, Ferreira, Ricardo ORCID logoORCID: https://orcid.org/0000-0003-1731-1588, Watson, Ian M. ORCID logoORCID: https://orcid.org/0000-0002-8797-3993, Gu, Erdan ORCID logoORCID: https://orcid.org/0000-0002-7607-9902, Kelly, Anthony E. and Dawson, Martin D. ORCID logoORCID: https://orcid.org/0000-0002-6639-2989
    Item type:Article
    ID code:53913
    Notes:The following article appeared as "Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes", Tian, Pengfei and McKendry, Jonathan J. D. and Herrnsdorf, Johannes and Watson, Scott and Ferreira, Ricardo and Watson, Ian M. and Gu, Erdan and Kelly, Anthony E. and Dawson, Martin D., Applied Physics Letters, 105, 171107 (2014) and may be found at http://dx.doi.org/10.1063/1.4900865. Copyright (2014) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
    Keywords:InGaN micro-light emitting diodes, LEDs, Auger coefficient, micro-LEDs, temperature-dependent modulation bandwidth, visible light communications, Optics. Light, Physics and Astronomy (miscellaneous)
    Subjects:Science > Physics > Optics. Light
    Department:University of Strathclyde > University of Strathclyde
    Faculty of Science > Physics > Institute of Photonics
    Faculty of Science > Physics
    Technology and Innovation Centre > Photonics
    Depositing user: Pure Administrator
    Date deposited:29 Jul 2015 11:22
    Last modified:09 Oct 2019 01:19
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/53913
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