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Optical Study of the Fe3+-Related Emission at 0.5 eV in InP:Fe

Published online by Cambridge University Press:  03 September 2012

Klaus Pressel
Affiliation:
4. Physikal. Inst., Univ. Stuttgart, Pfaffenwaldring 57, D-7000 Stuttgart 80
G. Bohnert
Affiliation:
4. Physikal. Inst., Univ. Stuttgart, Pfaffenwaldring 57, D-7000 Stuttgart 80
A. Dörnen
Affiliation:
4. Physikal. Inst., Univ. Stuttgart, Pfaffenwaldring 57, D-7000 Stuttgart 80
K. Thonke
Affiliation:
Abteilung Halbleiterphysik, Univ. Ulm, Postfach 4066, D-7900 Ulm
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Abstract

The 0.5 eV (2.5 μm 4000 cm1) emission band in InP has been studied by optical spectroscopy. By the use of Fourier-transform-infrared photoluminescence we have been able to observe at least a three-fold fine structure in the zero-phonon transitions at ∼ 4300 cm−1 which are studied at different temperatures. Based on the fine structure and the long decay time of 1.1 ms we ascribe the 0.5 eV emission to the 4T16A1 spin-flip transition of Fe3+. The excitation spectrum of this Fe3+-related emission shows a characteristic fine structure at ∼ 1.13 eV which belongs to a charge-transfer process of the type: Fe3+ + hv (1.13 eV) → [Fe2+, bound hole]. We discuss the excitation mechanism of the 0.5 eV emission by charge-transfer states and compare the results with an emission at 3057 cm1 in GaAs, which we attribute to the same Fe3+ transition (decay time: 1.9 ms).

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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References

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Optical Study of the Fe3+-Related Emission at 0.5 eV in InP:Fe
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