K. Borgohain et S. Mahamuni, LUMINESCENCE BEHAVIOR OF CHEMICALLY GROWN ZNO QUANTUM DOTS, Semiconductor science and technology (Print), 13(10), 1998, pp. 1154-1157
The luminescent properties of undoped ZnO quantum dots encapsulated in
various stabilizing agents have been investigated at room temperature
. Stoichiometric as well as non-stochiometric ZnO quantum dots have be
en prepared by different routes. These studies indicate the importance
of OH radical on the surface of ZnO quantum dots. In general, it has
been observed that surface defects play an active role in the luminesc
ence behaviour of quantum dots. ZnO quantum dots, doped with copper, h
ave also been studied. Doping Cu in ZnO quantum dots, which have OH ra
dical on its surface, is responsible for quenching green luminescence
at 530 nm.