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A novel solid state general illumina...

Nicol, David B.

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A novel solid state general illumination source.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	A novel solid state general illumination source./
Author:	Nicol, David B.
Description:	158 p.
Notes:	Adviser: Ian Ferguson.
Contained By:	Dissertation Abstracts International68-01B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3248746

A novel solid state general illumination source.
Nicol, David B.

A novel solid state general illumination source. - 158 p.

Adviser: Ian Ferguson.

Thesis (Ph.D.)--Georgia Institute of Technology, 2006.

A novel solid state illumination source has been developed. A two terminal dual LED has been created with the ability to control the relative intensities of the two emission peaks by varying drive current. Doping profiles have been used to extend the dynamic range of the dual LED over other reported devices. Operation of the dual LEDs is explained as a function of drive current. In addition, novel use of phosphor mixtures allows the creation of a broadband spectral power distribution that can be varied using a dual LED as an excitation source. Combinations of phosphors that have varied excitation spectra provide the ability to selectively excite different phosphors with the different LED emission peaks. First and second generations of the two terminal dual LED and the phosphor combination are discussed. The final source has the ability to mimic the light of a blackbody radiator over a range of 3200 K - 5300 K. The development of a three terminal dual LED as a pump source was prohibited by the need for a III-nitride tunnel junction, that proved unattainable in the scope of this work. However, several novel doping schemes were investigated toward this end. Finally, a circadian light source has also been developed that can affect physiological changes in humans, and a light box for entrainment of circadian rhythms in rats has been built.Subjects--Topical Terms:

1017759
Engineering, Materials Science.

A novel solid state general illumination source.
LDR:02181nam 2200265 a 45 001 970834
005 20110921
008 110921s2006 eng d
035 $a (UMI)AAI3248746
035 $a AAI3248746
040 $a UMI $c UMI
100 1 $a Nicol, David B. $3 1294874
245 1 2 $a A novel solid state general illumination source.
300 $a 158 p.
500 $a Adviser: Ian Ferguson.
500 $a Source: Dissertation Abstracts International, Volume: 68-01, Section: B, page: 0601.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2006.
520 $a A novel solid state illumination source has been developed. A two terminal dual LED has been created with the ability to control the relative intensities of the two emission peaks by varying drive current. Doping profiles have been used to extend the dynamic range of the dual LED over other reported devices. Operation of the dual LEDs is explained as a function of drive current. In addition, novel use of phosphor mixtures allows the creation of a broadband spectral power distribution that can be varied using a dual LED as an excitation source. Combinations of phosphors that have varied excitation spectra provide the ability to selectively excite different phosphors with the different LED emission peaks. First and second generations of the two terminal dual LED and the phosphor combination are discussed. The final source has the ability to mimic the light of a blackbody radiator over a range of 3200 K - 5300 K. The development of a three terminal dual LED as a pump source was prohibited by the need for a III-nitride tunnel junction, that proved unattainable in the scope of this work. However, several novel doping schemes were investigated toward this end. Finally, a circadian light source has also been developed that can affect physiological changes in humans, and a light box for entrainment of circadian rhythms in rats has been built.
590 $a School code: 0078.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Engineering, Packaging. $3 1025152
690 $a 0549
690 $a 0794
710 2 0 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 68-01B.
790 $a 0078
790 1 0 $a Ferguson, Ian, $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3248746