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Optical Characterization of AlGaN/GaN MQW's

Published online by Cambridge University Press:  17 March 2011

Ricardo A. Rocha ,
Teresa Monteiro ,
Estela Pereira  and
Eduardo Alves
Ricardo A. Rocha
Affiliation:
Departamento de Física, Universidade de Aveiro, Campus de Santiago, 3810 Aveiro, Portugal
Teresa Monteiro
Affiliation:
Departamento de Física, Universidade de Aveiro, Campus de Santiago, 3810 Aveiro, Portugal
Estela Pereira
Affiliation:
Departamento de Física, Universidade de Aveiro, Campus de Santiago, 3810 Aveiro, Portugal
Eduardo Alves
Affiliation:
Departamento de Física, Instituto Tecnológico e Nuclear, E.N. 10, 2686-935 Sacavém, Portugal
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Abstract

AlGaN/GaN multi-quantum wells (MQW's) were optically studied in this work. Photoluminescence spectra revealed a quantum Stark effect in the samples. Calculated builtin electric fields were found to be significantly less than the values expected from theoretical models. An approach concerning the existence of free charges responsible for screening of the electric field is made, where we find carrier densities very similar to values described in other works.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 639: Symposium G – GaN and Related Alloys-2000 , 2000 , G6.21
Copyright
Copyright © Materials Research Society 2001

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References

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