Enhanced Light Extraction From GaN-based LEDs With PS Nanospheres: Nanosphere layer on blue LEDs and nano-patterned sapphire substrate LEDs fabricated by nanosphere lithography - Softcover

Kao, Chien-Chih

Softcover

ISBN 10: 3639115066 ISBN 13: 9783639115062

Verlag: VDM Verlag Dr. Müller, 2009

Inhaltsangabe

In this book, we have demonstrated the surface roughness and nano-PSS LED fabricated by nanosphere lithography. In surface roughness LED, We have successfully proposed and fabricated GaN-based LEDs with nanosphere layers. The surface texturing process is easily and quickly achieved by using nanosphere layers. This coating of the nanosphere layers does not affect the electrical characteristic of the LED. The periodic structure of nanosphere layers enhances the light extraction efficiency of the LED. The luminance intensities of the LEDs with nanosphere layers of 300 nm and 500 nm diameters were seen to increase by 5.72% and 9.05% at 20 mA, respectively. In nano-PSS LED, the crystalline quality of GaN epilayer was estimated by XRD. The FWHM of nano-PSS LEDs and micro-PSS LEDs were narrower than that conventional LED. This means that we could improve crystal quality of GaN epilayer by using nano-PSS LEDs and micro-PSS. The nano-PSS LED also has better electrical property than conventional LED. The light output power of the nano- PSS LED was 18.8%~25.2%higher than the conventional LED.

Details zur Ausgabe

• Verlag: VDM Verlag Dr. Müller
• Erscheinungsdatum: 2009
• Sprache: Englisch
• ISBN 10: 3639115066
• ISBN 13: 9783639115062
• Einband: Taschenbuch
• Anzahl der Seiten: 64
• Kontakt zum Hersteller: Nicht verfügbar
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