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Frequency dependent electrical characteristics of PbS quantum dots

Published online by Cambridge University Press:  09 April 2008

S. Chowdhury ,
A. M. P. Hussain ,
G. A. Ahmed  and
A. Choudhury
S. Chowdhury*
Affiliation:
Dept. of Physics, Gauhati University, Guwahati, Assam-781014, India
A. M. P. Hussain
Affiliation:
Dept. of Physics, Gauhati University, Guwahati, Assam-781014, India
G. A. Ahmed
Affiliation:
Dept. of Physics, Tezpur University, Napaam, Tezpur, Assam-784028, India
A. Choudhury
Affiliation:
Dept. of Physics, Tezpur University, Napaam, Tezpur, Assam-784028, India Gauhati University, Guwahati, Assam 781014, India
*
[email protected]
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Abstract

PbS quantum dots (bare and silica coated) have been synthesized in PVA matrix with average size 10 nm and 9 nm. The capacitance-voltage (C − V) and current –voltage (I − V) response of both bare and coated quantum dots have been recorded in different frequency range (Hz–MHz). Both the samples show frequency dependent response except in case of C − V characteristics at MHz range. The I − V responses at low frequency range exhibit step like structures which could be attributed to 'Coulomb blockade'.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 42 , Issue 2 , May 2008 , pp. 113 - 119
Copyright
© EDP Sciences, 2008

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