Photonics Research, Volume. 5, Issue 2, A1(2017)

Toward commercial realization of quantum dot based white light-emitting diodes for general illumination

Ken T. Shimizu1、*, Marcel Böhmer2, Daniel Estrada1, Sumit Gangwal1, Stefan Grabowski3, Helmut Bechtel3, Edward Kang1, Kenneth J. Vampola1, Danielle Chamberlin1, Oleg B. Shchekin1, and Jyoti Bhardwaj1
Author Affiliations
  • 1Lumileds, LLC—370 West Trimble Road, San Jose, California 95131, USA
  • 2Lumileds Netherlands B.V., Beemdstraat 42, 5652 AB Eindhoven, The Netherlands
  • 3Lumileds, GmbH, Lumileds Development Center Aachen, Philipsstrasse 8, 52068 Aachen, Germany
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    Figures & Tables(9)
    LUXEON 3535L HE Plus lead frame LED package was used for integrating and testing QDs in silicone resins.
    (a) Modeling results showcasing LE performance expectations based on a 40 nm FWHM red QD compared to red nitride based pcLED. (b) Experimentally measured QD based LED CE normalized to a commercial red nitride based pcLED at different CCT values.
    (a) Measured CE performance versus drive current and (b) color point shift comparison between red nitride phosphor and QD based LED at 3000 K, driven in DC mode and 85°C heatsink temperature.
    Reliability of QD LEDs under 95°C and 200 mA HTOL conditions. (a) Light output maintenance and (b) color shift over 3000 h duration.
    Reliability of QD LEDs under 60°C/90% RH WHTOL stress conditions. (a) Light output maintenance and (b) color shift over 1000 h duration.
    LED efficiency comparison between QD based LED and hybrid direct Red + pcWhite LED modules at different temperatures.
    Normalized QE showcasing (a) thermal droop at 13 W/cm2 and (b) photoquenching comparison at 100°C between QD, broad red nitride, and SLA phosphor. Inset shows their respective emission spectra.
    • Table 1. Simulated FWHM Dependence for LE at 3000 K and 90 CRI

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      Table 1. Simulated FWHM Dependence for LE at 3000 K and 90 CRI

    • Table 2. External Testing Results of a QD Based LED and a pcLED Module on Printed Circuit Board

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      Table 2. External Testing Results of a QD Based LED and a pcLED Module on Printed Circuit Board

      SampleCurrent (mA)CCT (K)CRIR9Luminous Flux (lm)Efficacy (lm/W)
      QD based pcLED module A22529668952497160
      Phosphor based pcLED module B22530618945439142
      25830578944495137
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    Ken T. Shimizu, Marcel Böhmer, Daniel Estrada, Sumit Gangwal, Stefan Grabowski, Helmut Bechtel, Edward Kang, Kenneth J. Vampola, Danielle Chamberlin, Oleg B. Shchekin, Jyoti Bhardwaj. Toward commercial realization of quantum dot based white light-emitting diodes for general illumination[J]. Photonics Research, 2017, 5(2): A1

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    Paper Information

    Special Issue: RECENT DEVELOPMENTS IN LIGHT-EMITTING DIODE TECHNOLOGY AND APPLICATIONS

    Received: Nov. 17, 2016

    Accepted: Jan. 12, 2017

    Published Online: Sep. 27, 2018

    The Author Email: Ken T. Shimizu (ken.shimizu@Lumileds.com)

    DOI:10.1364/PRJ.5.0000A1

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