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II–VI semiconductor color converters for efficient green, yellow, and red light emitting diodes
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10.1063/1.3453447
/content/aip/journal/apl/96/23/10.1063/1.3453447
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/23/10.1063/1.3453447
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Band diagram of a II–VI color converter. (b) Band gap energies and lattice constants of the CdMgZnSe alloys used in the color converters. The points marked green, yellow, and red indicate the emission peaks and estimated lattice constants of the quantum wells. The spectrum of the blue LED used for photopumping is superimposed.

Image of FIG. 2.
FIG. 2.

Diagram of the blue LED and a II–VI color converter with inset showing details of the converter.

Image of FIG. 3.
FIG. 3.

Measured spectra of the blue LED, compared to that of three II–VI color converters when each was placed on top of the LED. The current through the LED was for all four spectra.

Image of FIG. 4.
FIG. 4.

Measured light output (in milliwatt) for the blue LED as a function of dc current, compared to that of each of the II–VI color converters when placed on the LED. The operating voltage of the LED is also shown.

Image of FIG. 5.
FIG. 5.

External quantum efficiency for the blue LED (photons per electron) and the external quantum conversion efficiency of three color converters (emitted photons per incident blue photon).

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/content/aip/journal/apl/96/23/10.1063/1.3453447
2010-06-11
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: II–VI semiconductor color converters for efficient green, yellow, and red light emitting diodes
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/23/10.1063/1.3453447
10.1063/1.3453447
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