https://doi.org/10.1051/epjap:2008043
Frequency dependent electrical characteristics of PbS quantum dots
1
Dept. of Physics, Gauhati University, Guwahati, Assam-781014, India
2
Dept. of Physics, Tezpur University, Napaam, Tezpur, Assam-784028, India
3
Gauhati University, Guwahati, Assam 781014, India
Corresponding author: shyamoli_ma@yahoo.co.in
Received:
23
November
2006
Revised:
28
March
2007
Accepted:
29
January
2008
Published online:
9
April
2008
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'.
PACS: 73.63.Kv – Quantum dots / 82.35.Np – Nanoparticles in polymers / 61.05.cp – X-ray diffraction
© EDP Sciences, 2008
