Thermal stability of stacked self-assembled InP quantum dots in GaInP

Autor:	Fritz Phillipp, M. K. Zundel, Kui Du, Neng Yun Jin-Phillipp, Karl Eberl
Rok vydání:	2002
Předmět:	Materials science Photoluminescence business.industry Diffusion Analytical chemistry General Physics and Astronomy law.invention law Quantum dot Optoelectronics Thermal stability Self-assembly Electron microscope business Anisotropy Spectroscopy
Zdroj:	Journal of Applied Physics. 91:3255-3260
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1446656
Popis:	Thermal stability of stacked self-assembled InP quantum dots (QDs) embedded in Ga0.51In0.49P (GaInP) under ex situ rapid thermal annealing (RTA) is studied by photoluminescence spectroscopy and quantitative high-resolution electron microscopy. It is found that InP QDs intermix with surrounding GaInP, and that this is enhanced with increasing temperature and duration of RTA. The preferential direction of the intermixing and reshaping of the QDs changes at different stages of RTA. This anisotropy is attributed to strain-assisted interdiffusion, and is expected in stacked QDs of other material systems.
Databáze:	OpenAIRE
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