32‐1: On‐chip Red Quantum Dots in White LEDs for General Illumination

32‐1: On‐chip Red Quantum Dots in White LEDs for General Illumination

We report on white LEDs for the general illumination market with red colloidal quantum dots (QDs) applied in an on‐chip configuration. Red QDs, in combination with conventional phosphors, lead to LED conversion efficiency improvements that close the gap between 80 and 90 color rendering indexes (CRI...

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Veröffentlicht in:SID International Symposium Digest of technical papers 2018-05, Vol.49 (1), p.405-408
Hauptverfasser: Estrada, Daniel, Shimizu, Ken, Bohmer, Marcel, Gangwal, Sumit, Diederich, Thomas, Grabowski, Stefan, Tashjian, Greg, Chamberlin, Danielle, Shchekin, Oleg B., Bhardwaj, Jyoti
Format: Artikel
Sprache:eng
Schlagworte:
Chip-on-Board
Illumination
Light emitting diodes
on-Chip
Particle Size
Performance indices
Phosphor
Phosphors
Quantum Dots
Reliability
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Beschreibung
Zusammenfassung:We report on white LEDs for the general illumination market with red colloidal quantum dots (QDs) applied in an on‐chip configuration. Red QDs, in combination with conventional phosphors, lead to LED conversion efficiency improvements that close the gap between 80 and 90 color rendering indexes (CRI) down to within 6% efficacy on a normalized Lm/W basis. We report on QDs colorcloud distribution compared to commercial phosphors in a large scale LED production and on a 7% performance gain from QDs in a chip on board (COB) LED device architecture.
ISSN:0097-966X
2168-0159
DOI:10.1002/sdtp.12585