Growth and characterizations of InP self-assembled quantum dots embedded in InAIP grown on GaAs substrates
| Autor: | Russell D. Dupuis, D. T. Mathes, James L. Merz, Robert Hull, Alexander Mintairov, Venkatesh Narayanamurti, C. V. Reddy, Jae-Hyun Ryou |
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| Rok vydání: | 2001 |
| Předmět: |
Photoluminescence
Solid-state physics Chemistry business.industry Nanotechnology Chemical vapor deposition Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Quantum dot Transmission electron microscopy Materials Chemistry Optoelectronics Metalorganic vapour phase epitaxy Electrical and Electronic Engineering business Luminescence Visible spectrum |
| Zdroj: | Journal of Electronic Materials. 30:471-476 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-001-0085-0 |
| Popis: | We report the characteristics of InP self-assembled quantum dots embedded in In0.5Al0.5P on GaAs substrates grown by metalorganic chemical vapor deposition. The InP quantum dots show increased average dot sizes and decreased dot densities, as the growth temperature increases from 475°C to 600°C with constant growth time. Above the growth temperature of 600°C, however, dramatically smaller and densely distributed self-assembled InP quantum dots are formed. The small InP quantum dots grown at 650°C are dislocation-free “coherent” regions with an average size of ∼20 nm (height) and a density of ∼1.5 × 108 mm−2. These InP quantum dots have a broad range of luminescence corresponding to red or organge in the visible spectrum. |
| Databáze: | OpenAIRE |
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