Evidence for 2D precursors and interdiffusion in the evolution of self-assembled CdSe quantum dots on ZnSe |
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| Authors: | Kim Kim Furdyna Dobrowolska Lee Rho Smith Jackson James Xin Browning |
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| Institution: | Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA. |
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| Abstract: | The evolution of self-assembled CdSe quantum dots deposited on (and subsequently capped by) ZnSe was investigated on a series of samples grown by molecular beam epitaxy, with CdSe coverages from 0.5 to 2.6 monolayers. The samples were investigated by cross-sectional scanning transmission electron microscopy, as well as macro- and microphotoluminescence. The results clearly indicated a coexistence of 2D ZnCdSe platelets and 3D islands, showing clearly that the platelets act as precursors for the formation of the 3D islands. |
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