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Microwave-Assisted Synthesis of CdS/ZnS:Cu QuantumDots for White Light-Emitting Diodes with High Color Rendition.
- Source :
-
Chemistry of Materials . Feb2015, Vol. 27 Issue 4, p1187-1193. 7p. - Publication Year :
- 2015
-
Abstract
- Highquality CdS/ZnS:Cu quantum dots (QDs) were first synthesizedvia a green microwave irradiation route. As-prepared core/shell dopedQDs presented a strong absorption in the blue light region and highlyefficient red to deep red emission with a maximum quantum yield of40%. The composite formed by dispersing CdS/ZnS:Cu QDs into siliconeresin showed an excellent photostability under blue illumination.Finally, high color rendition white light was generated from the CdS/ZnS:CuQDs-assisted phosphor-converted white light-emitting diode (WLED)in which there was no reabsorption between quantum dots and phosphors.Under operation of 40 mA forward bias current, the fabricated WLEDemitted bright natural white light with a high color rendering indexof 90, a luminous efficiency of 46.5 lm/W, and the correlated colortemperature of 6591 K. Simultaneously, the good color stability wasaccompanied by the CIE color coordinates of (0.3155, 0.3041) underdifferent forward bias currents. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM dots
*CADMIUM sulfide
*ZINC sulfide
*MICROWAVES
*LIGHT emitting diodes
Subjects
Details
- Language :
- English
- ISSN :
- 08974756
- Volume :
- 27
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Chemistry of Materials
- Publication Type :
- Academic Journal
- Accession number :
- 101146893
- Full Text :
- https://doi.org/10.1021/cm503770w