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Nitride-Based Light-Emitting Diodes Grown on Particular Substrates: ZrB2,(3038) 4H-SiC and r-faced Sapphire.

Published online by Cambridge University Press:  01 February 2011

Satoshi Kamiyama ,
Motoaki Iwaya ,
Hiroshi Amano  and
Isamu Akasaki
Satoshi Kamiyama
Affiliation:
Faculty of Science and Technology and Nano Factory, Meijo University, 1–501 Shiogamaguchi, Tempaku-ku, Nagoya 468–8502, Japan
Motoaki Iwaya
Affiliation:
Faculty of Science and Technology and Nano Factory, Meijo University, 1–501 Shiogamaguchi, Tempaku-ku, Nagoya 468–8502, Japan
Hiroshi Amano
Affiliation:
Faculty of Science and Technology and Nano Factory, Meijo University, 1–501 Shiogamaguchi, Tempaku-ku, Nagoya 468–8502, Japan
Isamu Akasaki
Affiliation:
Faculty of Science and Technology and Nano Factory, Meijo University, 1–501 Shiogamaguchi, Tempaku-ku, Nagoya 468–8502, Japan
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Abstract

New substrate materials; ZrB2,(3038) 4H-SiC and r-faced sapphire, are evaluated for use in nitride-based light-emitting diodes (LEDs). They are thought to be suitable for low-cost, short-wavelength, and highly efficient light-emitting devices. The ZrB2 substrate presents a high-quality nitride layers and a blue-violet LED with an excellent L-I curve. A vertical electrical transport is also possible due to its preferable work function and high electrical conductivity. Nitride layers tilted 54.7° from the c-plane can be grown on (3038) 4H-SiC. The LED grown on the (3038) 4H-SiC substrate shows a smaller blue shift of the EL peak wavelength with increasing driving current. Although the crystalline quality of nitride layers on r-faced sapphire was improved with the optimization of the misorientation angle, the performance of blue-violet LEDs is still low. Further work is needed to enable the practical application of r-faced sapphire to nitride-based LEDs.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 831: Symposium E – GaN, AlN, InN, and Their Alloys , 2004 , E10.6
Copyright
Copyright © Materials Research Society 2005

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References

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