Evidence for 2D precursors and interdiffusion in the evolution of self-assembled CdSe quantum dots on ZnSe
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.
Kim
CS
Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA.
Kim
M
Furdyna
JK
Dobrowolska
M
Lee
S
Rho
H
Smith
LM
Jackson
HE
James
EM
Xin
Y
Browning
ND