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Preparation of Ii-Vi Quantum Dot Composites by Electrospray OMCVD

Published online by Cambridge University Press:  21 February 2011

M. Danek ,
K. F. Jensen ,
C. B. Murray  and
M. G. Bawendi
M. Danek
Affiliation:
Chemical Engineering
K. F. Jensen
Affiliation:
Massachusetts Institute of Technology, Departments of Chemistry Cambridge, Massachusetts 02139
C. B. Murray
Affiliation:
Chemical Engineering
M. G. Bawendi
Affiliation:
Chemical Engineering
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Abstract

A novel technique combining electrospray and organometallic chemical vapor deposition (OMCVD) has been developed for synthesis of VI-II quantum dot composites. CdSe nanocrystallites dispersed in a mixture of pyridine and acetonitrile were electrosprayed into the gas-phase in the growth zone of an OMCVD reactor and then incorporated into a ZnSe matrix grown by OMCVD. Hydrogen selenide and diethylzinc were used to deposit the ZnSe matrix at temperatures of 150 - 240°C. The ZnSe/CdSe quantum dot composites were characterized by visible absorption spectroscopy, room temperature photoluminescence and Auger electron spectroscopy. The optical properties of the composites are determined by the size of the original CdSe nanocrystallites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 326: Symposium M – Growth, Processing, and Characterization of Semiconductor Heterostructures , 1993 , 275
Copyright
Copyright © Materials Research Society 1994

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