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(a) PL spectra of Sn-implanted layers after annealing in ambient and in vacuum at different temperatures. (b) Blue-violet PL peak intensity for the Sn-implanted layers annealed in ambient (open circle) and in vacuum (closed circle).
Cross-sectional TEM images showing the Sn nanoclusters within the layer after heat treatment in ambient at 600 °C (a), 700 °C (b), and 900 °C (c) and (d). The solid lines give the Sn distribution profile obtained by RBS. The inset of (d) displays a lattice image of a particle formed by a -Sn core and a shell.
Cross-sectional TEM image showing the Sn nanoclusters within the layer after heat treatment at 900 °C in vacuum. The solid line gives the Sn distribution profile obtained by RBS.
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