The calculate of optical gap energy and urbach energy of Ni1-2CoxO thin films

被引：11

作者：

Benramache, Said ^{[1
]}

Aoun, Yacine ^{[1
,2
]}

Lakel, Said ^{[3
]}

Benhaoua, Boubaker ^{[4
]}

Torchi, Chahrazed ^{[3
]}

机构：

[1] Univ Biskra, Lab Phys Photon & Nanomat Multifonct, Biskra 07000, Algeria

[2] El Oued Univ, Dept Mech, El Oued 39000, Algeria

[3] Biskra Univ, Dept Mat Sci, Biskra 07000, Algeria

[4] Unite Rech Energies Renouvelables Zones Arides, El Oued 39000, Algeria

来源：

SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES | 2019年 / 44卷 / 01期

关键词：

NiO; thin films; co doping; TCO; sol-gel sping coating method; SPRAY-PYROLYSIS; NIO FILMS; TEMPERATURE; THICKNESS; ZNO;

D O I：

10.1007/s12046-018-1003-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Co doping on optical, structural and electrical properties of Ni1-xCoxO thin films has been successfully deposited on glass substrate by Sol-Gel Sping coating technique. The main objective of this research is to study the Ni1-xCoxO thin films to determine the optical gap energy by various methods and compare of calculated values. The transmission spectra show that the Ni1-xCoxO thin films have a good optical transparency in the visible region. The optical gap energy was varied between 3.8 and 4.05 eV, which was determined by various methods and equations. These are found in the drawn of A, A(2), alpha, alpha(2) (Ahm)(2) and (alpha hm)(2) as a function of the photon energy h nu, the suitable method to calculate the optical energy was observed for (Ahm)(2) versus hm, but this method can not be related to the film thickness. The urbach energy of the Ni1-xCoxO thin films also was determined by the curves of LnA and Ln alpha as a function of photon energy hm. The deduce by LnA versus hm is also suitable to estimate the urbach energy. However, the Ni0.96Co0.04O thin films have a few defects with minimum value of urbach energy. XRD patterns of the Ni1-xCoxO thin films indicate that some films are polycrystalline with cubic structure. The electrical conductivity of our films is in the order of 8.2*10(-3) (Omega.cm)(1).

引用

页数：6

共 25 条

[1] Structural, optical and photo-catalytic activity of nanocrystalline NiO thin films [J].

Al-Ghamdi, Attieh A. ;

Abdel-wahab, M. Sh. ;

Farghali, A. A. ;

Hasan, P. M. Z. .

MATERIALS RESEARCH BULLETIN, 2016, 75 :71-77

[2]

Benramache S., 2016, Journal of Chemistry and Materials Research, V5, P119

[3] Effect of substrate temperature on the stability of transparent conducting cobalt doped ZnO thin films [J].

Benramache, Said ;

Benhaoua, Boubaker ;

Chabane, Foued .

JOURNAL OF SEMICONDUCTORS, 2012, 33 (09)

[4] Influence of annealing temperature on structural and optical properties of ZnO: In thin films prepared by ultrasonic spray technique [J].

Benramache, Said ;

Benhaoua, Boubaker .

SUPERLATTICES AND MICROSTRUCTURES, 2012, 52 (06) :1062-1070

[5] Influence of substrate temperature and Cobalt concentration on structural and optical properties of ZnO thin films prepared by Ultrasonic spray technique [J].

Benramache, Said ;

Benhaoua, Boubaker .

SUPERLATTICES AND MICROSTRUCTURES, 2012, 52 (04) :807-815

[6] Ultra fast electrochromic switching of nanostructured NiO films electrodeposited from choline chloride-based ionic liquid [J].

Cai, G. F. ;

Gu, C. D. ;

Zhang, J. ;

Liu, P. C. ;

Wang, X. L. ;

You, Y. H. ;

Tu, J. P. .

ELECTROCHIMICA ACTA, 2013, 87 :341-347

[7] Synthesis of core-shell α-Fe2O3@NiO nanofibers with hollow structures and their enhanced HCHO sensing properties [J].

Cao, Jing ;

Wang, Ziying ;

Wang, Rui ;

Liu, Sen ;

Fei, Teng ;

Wang, Lijie ;

Zhang, Tong .

JOURNAL OF MATERIALS CHEMISTRY A, 2015, 3 (10) :5635-5641

[8] Studies of influence of structural properties and thickness of NiO thin films on formaldehyde detection [J].

Castro-Hurtado, I. ;

Herran, J. ;

Mandayo, G. G. ;

Castano, E. .

THIN SOLID FILMS, 2011, 520 (03) :947-952

[9] Effect of palladium content on microstructures, electrical and optical properties of NiO films by rf sputtering [J].

Chen, S. C. ;

Kuo, T. Y. ;

Lin, Y. C. ;

Hsu, S. W. ;

Lin, H. C. .

THIN SOLID FILMS, 2013, 549 :50-53

[10] Preparation and properties of p-type transparent conductive Cu-doped NiO films [J].

Chen, S. C. ;

Kuo, T. Y. ;

Lin, Y. C. ;

Lin, H. C. .

THIN SOLID FILMS, 2011, 519 (15) :4944-4947

← 1 2 3 →