Growth of self-assembled PbSe quantum-dots on GaSb(100) by liquid phase epitaxy

Self-assembled PbSe quantum-dots (QD) have been grown on GaSb(100) substrates from the liquid phase. A Pb-rich melt at 517°C was used with 10°C supercooling and with a short (10 ms) melt-substrate contact time. Atomic force microscopy has revealed that the PbSe QDs are 4–10 nm in height and 10–40 nm in diameter, with an area density of 1.7×1010 cm−2. The growth of QDs occurs in the Volmer–Weber mode and is a result of the difference in lattice structures between the PbSe and GaSb rather than the lattice constants.

Source:IOPscience

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