Al doped Zinc oxide nanoparticles synthesized by laser pyrolysis
F. Dumitrache
1,*
, I. Morjan
1
, C. Fleaca
1
, E. Dutu
1
, C. Luculescu
1
, L. Gavrila
1
, C. I. Locovei
2
,
E. Vasile
3
Laser Photochemistry Laboratory, National Institute for Lasers, Plasma and Radiation
Physics (NILPRP), 409 Atomistilor Str., 077125, Magurele – Bucharest, Romania
University of Bucharest, Faculty of Physics, 409 Atomistilor Str., 077125,
Magurele – Bucharest, Romania
University POLITEHNICA of Bucharest, . 313 Splaiul Independentei str. Bucuresti,
ROMANIA
E-mail
Resume : Al doped zinc oxide nanoparticles were synthesized by the CO2 laser pyrolysis
using a reactive mixture containing vapors of diethylzinc (as zinc source) and
trimethylaluminum (as Al source) carried by Ar and/or C
2
H
4
. Furthermore, the ethylene was
used as laser energy transfer agent and a mixture of oxygen and argon as oxidizing agent.
Using an entry with three concentric nozzles and separated trails for vapor metal precursors
and the oxidizing mixture favor the powder synthesis mainly in the laser pyrolysis flame
Here
we report the successful control of Al doped values up to 10 at% in a dominant ZnO
nanocrystaline structure. TEM and XRD analyzes for the as synthesized nanopowders
demonstrate an improved crystalline structure oriented to crystalline mono-domains with
mean crystalline sizes around 20 nm. Spin coating technique were used to prepare thin films
from as synthesized or thermal treated (350
C) nanoparticle samples and their optical and
electrical properties were investigated.
PS2 2
-196-
