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Al-doped ZnO nanoparticles have been synthesised via sol–gel method. Aluminum nitrate and aluminum chloride, as two widespread doping sources, have been compared in various Al/Zn molar ratios of 0.1, 0.5, 1, 2 and 5. After sol preparation, all samples with different Al content have been aged and then dried at 120°C. The resultant grinned powders calcined at different temperatures of 400, 500, and 600°C. X-ray diffraction (XRD) method has been used to investigate crystallisation behaviour and structural properties of samples. Less crystallinity in chloride source samples is detected compared to the nitrate source; however, identical distortion of hexagonal wurtzite unit cell in both sources was evident in XRD results. Field emission scanning electron microscopy demonstrates semisphere morphology of ZnO nanoparticles with particle size less than 60 nm. Fourier transform infrared spectroscopy was conducted to find possible chemical reactions and complexes during the sol–gel process in different Al source samples. UV-vis spectroscopy was carried out to find optical properties of the Al:ZnO samples. The results represent different optical properties in Al chloride and Al nitrate sources.
References
-
-
1)
-
S. Chirakkara ,
S. Krupanidhi
.
Pulsed laser deposited ZnO/ZnO:Li multilayer for blue light emitting diode.
J. Lumin.
,
1649 -
1654
-
2)
-
S. Rozati ,
S. Akesteh
.
Characterization of ZnO:Al thin films obtained by spray pyrolysis technique.
Mater. Charact.
,
319 -
322
-
3)
-
U. Ozgur ,
Y.I. Alivov ,
C. Liu
.
A comprehensive review of ZnO materials and devices.
J. Appl. Phys.
-
4)
-
H. Morkoç ,
Ü. Özgür
.
(2009)
Zinc Oxide fundamentals, materials and device technology.
-
5)
-
C. Gorla ,
N. Emanetoglu ,
S. Liang
.
Structural, optical, and surface acoustic wave properties of epitaxial ZnO films grown on (012) sapphire by metalorganic chemical vapor deposition.
J. Appl. Phys.
,
2595 -
2602
-
6)
-
L. Spanhel
.
Colloidal ZnO nanostructures and functional coatings: a survey.
J. Sol-Gel. Sci. Techn.
,
7 -
24
-
7)
-
G. Yordanov ,
N. Kaneva ,
C. Dushkin
.
Synthesis and characte rization of novel core-s hell colloidal particles ZnO/poly(ethylcyanoacrylate).
Colloid. Polym. Sci.
,
733 -
738
-
8)
-
V. Musat ,
B. Teixeira ,
E. Fortunato
.
Al-doped ZnO thin films by sol–gel method.
Surf. Coat. Tech.
,
659 -
662
-
9)
-
K. Berggren ,
B. Sernelius
.
Band-gap narrowing in heavily doped many-valley semiconductors.
Phys. Rev. B.
,
1971 -
1986
-
10)
-
A. Jain ,
P. Sagar ,
R. Mehra
.
Band gap widening and narrowing in moderately and heavily doped n-ZnO films.
Solid. State. Electron.
,
1420 -
1424
-
11)
-
A. Kurz ,
K. Brakecha ,
J. Puetz
.
Strategies for novel transparent conducting sol – gel oxide coatings.
Thin. Solid. Films.
,
212 -
218
-
12)
-
B. Cullity
.
(1956)
Elements of X-ray diffraction.
-
13)
-
S. Lin ,
J. Huang ,
P. Sajgalik
.
Effects of substrate temperature on the properties of heavily Al-doped ZnO films by simultaneous r.f. and d.c. magnetron sputtering.
Surf. Coat. Tech.
,
39 -
47
-
14)
-
S. Baruah ,
J. Dutta
.
Hydrothermal growth of ZnO Nanostructures.
Mater. Sci. Technol. Adv.
,
1 -
18
-
15)
-
Y. Kim ,
W. Tai
.
Electrical and optical properties of Al-doped ZnO thin films by sol–gel process.
Appl. Surf. Sci.
,
4911 -
4916
-
16)
-
J. Shackelford
.
(1985)
Introduction to material science for engineers.
-
17)
-
K. Tominaga ,
T. Murayama ,
I. Mori
.
Effect of insertion of thin ZnO layer in transparent conductive ZnO:Al film.
Thin. Solid. Films.
,
267 -
270
-
18)
-
K. Lin ,
P. Tsai
.
Growth mechanism and characterization of ZnO: Al multi-layer ed thin films by sol –gel technique.
Thin. Solid. Films.
,
8601 -
8604
-
19)
-
B.E. Sernelius ,
K.F. Berggren ,
Z.C. Jin ,
I. Hamberg ,
C.G. Granqvist
.
Band-gap tailoring of ZnO by means of heavy Al doping.
Phys. Rev. B
-
20)
-
M. Ohyama ,
H. Kozuka ,
T. Yoko
.
Sol–Gel Preparation of transparent and conductive aluminum-doped zinc oxide films with highly preferential crystal orientation.
J. Am. Ceram. Soc.
,
1622 -
1632
-
21)
-
L. Vayssieres
.
Growth of arrayed nanorods and nanowires of ZnO from aqueous solutions.
Adv. Mater.
,
464 -
466
-
22)
-
J. Zhang ,
W. Que
.
Preparation and characte rization of sol–gel Al-dope d ZnO thin films and ZnO nanowir e arrays grown on Al-doped ZnO seed layer by hydrothermal method.
Sol. Energ. Mat. Sol. C.
,
2181 -
2186
-
23)
-
G. Valle ,
P. Hammer ,
S. Pulcinelli
.
Transparent and conductive ZnO:Al thin films prepared by sol-gel dip-coating.
J. Eur. Ceram. Soc.
,
1009 -
1013
-
24)
-
B. Gupta ,
A. Jain ,
R. Mehra
.
Development and Characterization of Sol-gel Derived Al Doped ZnO/p-Si Photo diode.
J. Mater. Sci. Technol.
,
223 -
227
-
25)
-
M. Lee ,
H. Park ,
H. Jang
.
Solid solubility limits of Ga and Al in ZnO.
J. Mater. Sci. Lett.
,
1703 -
1704
-
26)
-
J. Baxter ,
E. Aydil
.
Dye-sensitized solar cells based on semiconductor morphologies with ZnO nanowires.
Sol. Energ. Mat. Sol. C.
,
607 -
622
-
27)
-
S. Bandyopadhyay ,
G. Paul ,
R. Roya
.
Study of structural and electrical properties of grain-boundary modified ZnO films prepared by sol–gel technique.
Chem. Phys.
,
83 -
91
-
28)
-
C.M. Chang ,
M.H. Hon ,
I.C. Leu
.
Preparation of ZnO nanorod arrays with tailored defect-related characteristics and their effect on the ethanol gas sensing performance.
Sens. Actuators B
,
15 -
20
-
29)
-
Z. Xu ,
H. Deng ,
Y. Li
.
Characteristics of Al-doped c -axis orientation ZnO thin films prepared by the sol–gel method.
Mater. Res. Bull.
,
354 -
358
-
30)
-
M. Kamalasanan ,
S. Chandra
.
Sol-gel synthesis of ZnO thin films.
Thin. Solid. Films.
,
112 -
115
-
31)
-
J. Mass ,
M. Avella ,
J. Jimenez
.
Cathodoluminescence study of extended defects in hydrothermal ZnO crystals.
Superlattice. Microst.
,
306 -
313
-
32)
-
S. Xue ,
X. Zu
.
Effects of annealing and dopant concentration on the optical characteristics of ZnO:Al thin films by sol–gel technique.
Physica. B.
,
201 -
204
-
33)
-
L. Spanhel ,
M. Anderson
.
Semiconductor clusters in the sol-gel process: quantized aggregation, gelation, and crystal growth in concentrated ZnO colloids.
J. Am. Chem. Soc.
,
2826 -
2833
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