Record Details

Strong blue excitonic emission from CdS nanocrystallites prepared by LB technique

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Strong blue excitonic emission from CdS nanocrystallites prepared by LB technique
 
Creator MANDAL, P
TALWAR, SS
SRINIVASA, RS
MAJOR, SS
 
Subject langmuir-blodgett-films
cadmium-sulfide
quantum dots
semiconductor clusters
electronic-state
multilayers
photoluminescence
deposition
zno
nanoparticles
 
Description CdS nanocrystallites formed in ordered fatty acid LB multilayers exhibited strong surface states emission similar to 550 nm and weak excitonic emission similar to 400 nm. Treatment with aqueous CdCl(2) resulted in the suppression of surface states emission and enhancement of the blue excitonic emission. Subsequent annealing in air at 200A degrees C caused an order of magnitude enhancement of excitonic emission. The growth of nanocrystallites during annealing as seen from the red-shift of excitonic absorption and emission is suppressed by the CdCl(2) treatment. The hindered growth of nanocrystallites, the significant enhancement of excitonic emission from CdS, and the suppression of surface states emission are attributed to surface passivation of CdS nanocrystallites by surface oxide formation.
 
Publisher SPRINGER
 
Date 2011-08-29T19:27:55Z
2011-12-26T12:58:44Z
2011-12-27T05:49:09Z
2011-08-29T19:27:55Z
2011-12-26T12:58:44Z
2011-12-27T05:49:09Z
2009
 
Type Article
 
Identifier APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 94(3), 577-584
0947-8396
http://dx.doi.org/10.1007/s00339-008-4891-6
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12171
http://hdl.handle.net/10054/12171
 
Language en