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
- Photonics Research
- Vol. 5, Issue 2, A1 (2017)
Fig. 1. LUXEON 3535L HE Plus lead frame LED package was used for integrating and testing QDs in silicone resins.
Fig. 2. (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.
Fig. 3. (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.
Fig. 4. Reliability of QD LEDs under 95°C and 200 mA HTOL conditions. (a) Light output maintenance and (b) color shift over 3000 h duration.
Fig. 5. Reliability of QD LEDs under 60°C/90% RH WHTOL stress conditions. (a) Light output maintenance and (b) color shift over 1000 h duration.
Fig. 6. LED efficiency comparison between QD based LED and hybrid direct Red + pcWhite LED modules at different temperatures.
Fig. 7. Normalized QE showcasing (a) thermal droop at 13 W / cm 2
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Table 1. Simulated FWHM Dependence for LE at 3000 K and 90 CRI
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Table 2. External Testing Results of a QD Based LED and a pcLED Module on Printed Circuit Board
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