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Journal of Environmental Nanotechnology

(A Quarterly Peer-reviewed and Refereed International Journal)
ISSN(Print):2279-07 48; ISSN(Online):2319-5541

Optical and structural properties of doped and undoped CdO thin films


Optical and structural properties of pure CdO, Cu:CdO and Al:CdO thin films were presented in this work. The Cadmium Oxide (CdO) semiconducting films were deposited on a glass substrate by dip coating method using Cadmium Chloride as the precursor with ammonium hydroxide. The structural and optical properties of the films were observed. The crystalline structure was studied by X-ray diffraction (XRD) and found the presence of the CdO cubic phase. The variation of absorption with wavelength was studied. The absorption of the film was found to be increased after doping. It revealed that the copper doped thin films, annealed at 500â—¦C has improved the transmittance of these films. The optical band gap of Cu:CdO was observed as 3.70 eV with 4% Cu dope and increased to 3.76eV with 8% Cu dope. But the optical band gap of Al:CdO was observed to be 3.70 eV with 3%Al doping and decreased to 3.66eV with 5% Al doping.

Article Type: Research Article

Corresponding Author: V.Radhika 1  

Email: radhikaviswanath@gmail.com

This article has not yet been cited.

V.Radhika 1*,  V.Annamalai. 2,  Vijaya.G,  3,  Annakkodi.D 4.  

1, 3, 4. Departmentof Physics, PKR Arts college for women, Gobichettipalayam.

2. Departmentof Physics, Chikkanna Govt. Arts College, Tiruppur.

J. Environ. Nanotechnol., Volume 5, No. 3 pp. 39-43
ISSN: 2279-0748 eISSN: 2319-5541
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Al Mohammad. A,Synthesis, Separation and Electrical Properties of WO3-x Nanopowders via Partial Pressure High Energy Ball-Milling, ACTA Physica Polonica A, 116(2), 240-244(2009).      

Ansari. S.A, Nisar. A, Fatma .B, Khan. W, Naqvi .A, Investigation on structural, optical and dielectric properties of Co doped ZnO nanoparticles synthesized by gel-combustion route.Mater. Sci. Engg., B, 177, 428-435(2012).


Diah Susanti, Gede Pradnyana Diputra A. A., Lucky Tananta,  Hariyati Purwaningsih,  George Endri Kusuma,   Chenhao Wang,   Shaoju Shih and  Yingsheng Huang,  WO3 nanomaterials synthesized via a sol-gel method and calcination for use as a CO gas sensor, Frontiers of Chemical Science and Engineering, 8(2), 179–187(2014).        


Dirany. N, Arab. M., Madigou.V., Leroux. Ch and Gavarri . J. R., A facile one step route to synthesize WO3 nanoplatelets for CO oxidation and photodegradation of RhB: microstructural, optical and electrical studies, RSC Adv., 6, 69615-69626(2016).            

doi: 10.1039/C6RA13500E

El-Nahass. M.M, Ali. H.A.M, Saadeldin. M, Zaghllol. M, AC conductivity and dielectric properties of bulk tungsten trioxide (WO3), Physica B, 407, 4453–4457(2012).          


Gillet .M, Aguir.K,  Lemire .C, Gillet .E and  Schierbaum. K., The structure and electrical conductivity of vacuum-annealed WO3 thin films, Thin Solid Films, 467(1–2), 239–246 (2004).


Huirache-Acuna. R, Paraguay-Delgado.F, Albiter. M.A, Lara-Romero .J and Martínez-Sánchez .R, Synthesis and characterization of WO3 nanostructures prepared by an aged-hydrothermal method, Mater. Charact.  60 (9), 932–937 (2009).


Hutchins. M. G, Abu-Alkhair. O, MMEl-Nahass and Abdel-Hady. K Electrical conduction mechanisms in thermally evaporated tungsten trioxide (WO3) thin films, J. Phys.: Condens. Matter, 18, 9987–9997(2006).


Jianhua Hao,. Studenikin. S. A, and Michael Cocivera, Transient photoconductivity properties of tungsten oxide thin films prepared by spray pyrolysis, J. Appl. Phys., 90 (10) 5064-5069(2001).


Joni Huotari, Jyrki Lappalainen, Jarkko Puustinen, Tobias Baur, Christine Alépée, Tomi Haapalainen, Samuli Komulainen, Juho Pylvänäinen and Anita Lloyd Spetz,  Pulsed Laser Deposition of Metal Oxide Nanoparticles, Agglomerates, and Nanotrees for Chemical Sensors procedia engineering , 120, 1158-1161(2015).


Jonscher . A. K. The ‘universal’ dielectric response Nature 267, 673-679 (1977)

doi:10.1038/267673a0 .

Pechini Maggio P. Barium, titanium citrate, barium titanate and process for producing same. Unite States Patent. No.3231328, (1966).

Powder Diffraction File, JCPDS-ICDD,” 12Campus Boulevard, Newtown Square, Pa, USA, (2001).

Sandra Hilaire, Martin J. Süess, Niklaus Kränzlin, Krzysztof Bieńkowski, Renata Solarska, Jan Augustyński and Markus Niederberger,  J. Mater. Chem. A, 2, 20530-20537(2014).   

doi: 10.1039/C4TA04793A.

Shaltout , Yi Tang ,  Braunstein. R , E.E. Shaisha. R., FTIR spectra and some optical properties of tungstate-tellurite glasses, J. Phy. Chem. Solids, 57(9), 1223-1230(1996).


Yoji Yamada, Kenji Tabata and Tatsuaki Yashima, The character of WO3 film prepared with RF sputtering, Sol. Energ. Mat. Sol. Cells 91(1), 29-37(2007).