Optical Transmittance and Band Gap of Electrodeposited Cu2O/ITO Layers

Cuprous oxide films are successfully electrodeposited through the reduction of cupric ions in alkaline and acid electrolytes. The effect of electrodeposition parameters on the optical band gaps of Cu2O films is investigated using UV-vis spectroscopy. It is found that the optical transmittances and the band gaps of the Cu2O thin films are strongly influenced by the electrodeposition bath, the temperature, the current density, and the pH value. The band gaps are varied from 1.80 eV to 2.43 eV with different electrodeposition parameters.

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Growth of High-Quality (111) Oriented Cuprous Oxide Thin Films Oxidized in Water Vapor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.832.138 ◽

2013 ◽

Vol 832 ◽

pp. 138-142

Author(s):

Jian Bo Liang ◽

Xu Yang Li ◽

Naoki Kishi ◽

Tetsuo Soga

Keyword(s):

Thin Films ◽

Water Vapor ◽

Cuprous Oxide ◽

Copper Foil ◽

Heating Temperature ◽

Band Gaps ◽

Oxide Thin Films ◽

High Quality ◽

Oxidation Method ◽

Optical Band Gaps

High quality cuprous oxide thin films with large grain size were grown by thermal oxidation of copper foil in water vapor with N2 gas. It was found that in water vapor (111) oriented Cu2O is preferentially formed, whereas mixtures of random oriented CuO and Cu2O are formed when oxidized in air. The effects of the film oxidation method and heating temperature are investigated. In addition, the optical band gaps of cuprous oxide thin films have been determined by measuring the transmittance and reflectance spectra.

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Surface engineering of electrodeposited cuprous oxide (Cu2O) thin films: effect on hydrophobicity and LP gas sensing

Applied Surface Science ◽

10.1016/j.apsusc.2021.150020 ◽

2021 ◽

pp. 150020

Author(s):

K.N.D. Bandara ◽

K.M.D.C. Jayathilaka ◽

D.P. Dissanayake ◽

J.K.D.S. Jayanetti

Keyword(s):

Thin Films ◽

Cuprous Oxide ◽

Surface Engineering ◽

Gas Sensing ◽

Cu2o Thin Films

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The dielectric functions and optical band gaps of thin films of amorphous and cubic crystalline Mg~2NiH~4

Thin Solid Films ◽

10.1016/j.tsf.2012.07.044 ◽

2012 ◽

Vol 520 (22) ◽

pp. 6786-6792 ◽

Cited By ~ 8

Author(s):

J.H. Selj ◽

T. Mongstad ◽

B.C. Hauback ◽

S.Zh. Karazhanov

Keyword(s):

Thin Films ◽

Band Gaps ◽

Optical Band Gaps

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Effects of the Argon Pressure on the Optical Band Gap of Zinc Oxide Thin Films Grown by Nonreactive RF Sputtering

Advances in Condensed Matter Physics ◽

10.1155/2013/970976 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 8

Author(s):

M. Acosta ◽

I. Riech ◽

E. Martín-Tovar

Keyword(s):

Thin Films ◽

Zinc Oxide ◽

Band Gap ◽

Room Temperature ◽

Optical Band Gap ◽

Rf Sputtering ◽

Argon Pressure ◽

Band Gaps ◽

Zno Thin Films ◽

Optical Band Gaps

Zinc oxide (ZnO) thin films were grown by nonreactive RF sputtering at room temperature under varying argon pressures (PAr). Their optical band gap was found to increase from 3.58 to 4.34 eV when the argon pressure increases from 2.67 to 10.66 Pa. After annealing at 200°C and 500°C, optical band gaps decrease considerably. The observed widening of the band gap with increasingPArcan be understood as being a consequence of the poorer crystallinity of films grown at higher pressures. Measurements of morphological and electrical properties of these films correlate well with this picture. Our main aim is to understand the effects ofPAron several physical properties of the films, and most importantly on its optical band gap.

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Influence of Organic Additive Benzene Sulfamide on the Magnetic Behavior of Electrodeposited CoMnP Thin Film Alloys

Sensor Letters ◽

10.1166/sl.2019.4163 ◽

2019 ◽

Vol 17 (11) ◽

pp. 909-912

Author(s):

M.RM. Krishnappa ◽

K.V. Kannan Nithin

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Current Density ◽

Ph Value ◽

Magnetic Behavior ◽

Organic Additive ◽

Additive Concentration ◽

Electro Deposition ◽

Nano Crystalline ◽

Micro Cracks

Electro deposition of CoMnP thin films was carried out for different concentrations of organic additive Benzene sulfamide at a constant bath pH value and for various current density. Magnetic properties such as coercivity, saturation magnetization and the surface morphology were investigated for electrodeposited CoMnP thin films. The characteristics of the CoMnP thin films were found to attain enhanced values, because of the variation in the concentration of the bath solution. The Scanning Electron Microscope (SEM) micrographs of the CoMnP thin films for various bath compositions and additive concentration exhibited different micro cracks. From the X-ray diffraction pattern, structure of the CoMnP alloy films was analyzed and it was found to be Hesagonal Close Packed (HCP) structures with the dominant microstructure and all the co-deposited thin films were found to exhibit Nano crystalline structure. The magnetic properties of the specimens were characterized using Vibrating Sample Magnetometer (VSM). Adhesion and hardness of the electroplated films influenced by organic additive Benzene Sulfamide were also investigated. The magnetic properties were highly influenced by the addition of the organic additive Benzene Sulfamide for various bath composition and bath conditions. Under best condition involving addition of 0.2 M of NaH2PO2 and 2 g/L of Benzene Sulfamide acid at current density 5 mA/cm2 and time of deposition 60 Minutes, the thickness of the film was found to be 4.6 micrometer with coercivity 1500 Oe.

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Low contact resistivity of metals on nitrogen-doped cuprous oxide (Cu2O) thin-films

Journal of Applied Physics ◽

10.1063/1.4758305 ◽

2012 ◽

Vol 112 (8) ◽

pp. 084508 ◽

Cited By ~ 14

Author(s):

Sin Cheng Siah ◽

Yun Seog Lee ◽

Yaron Segal ◽

Tonio Buonassisi

Keyword(s):

Thin Films ◽

Cuprous Oxide ◽

Contact Resistivity ◽

Nitrogen Doped ◽

Cu2o Thin Films

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Lead ethyl dithiocarbamates: efficient single-source precursors to PbS nanocubes

Royal Society Open Science ◽

10.1098/rsos.190943 ◽

2019 ◽

Vol 6 (10) ◽

pp. 190943 ◽

Cited By ~ 5

Author(s):

S. A. Saah ◽

N. O. Boadi ◽

D. Adu-Poku ◽

C. Wilkins

Keyword(s):

Thin Films ◽

Spin Coating ◽

Band Gaps ◽

Single Source ◽

Single Source Precursors ◽

X Ray ◽

Annealing Temperatures ◽

Optical Band Gaps ◽

Microscopy Images ◽

Scanning Electron

Lead ethyl dithiocarbamates have been successfully used as single-source precursors for the deposition of PbS using spin coating followed by annealing at moderate temperatures. The thin films were characterized using a powder X-ray diffractometer and were found to be face-centred cubic with the (200) plane being the most preferred orientation. Scanning electron microscopy images showed the formation of well-defined cubes. Optical band gaps of PbS thin films were estimated using Tauc plots as 0.72, 0.73 and 0.77 eV at annealing temperatures of 250, 300 and 400°C. These band gaps were all blue shifted from the bulk value of 0.41 eV. Energy-dispersive X-ray analysis was used to determine the composition of the thin films which showed an approximately 1 : 1 Pb to S ratio.

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Visible Light Driven Heterojunction Photocatalyst of CuO–Cu2O Thin Films for Photocatalytic Degradation of Organic Pollutants

Nanomaterials ◽

10.3390/nano9071011 ◽

2019 ◽

Vol 9 (7) ◽

pp. 1011 ◽

Cited By ~ 25

Author(s):

Negar Dasineh Khiavi ◽

Reza Katal ◽

Saeideh Kholghi Eshkalak ◽

Saeid Masudy-Panah ◽

Seeram Ramakrishna ◽

...

Keyword(s):

Thin Films ◽

Photocatalytic Degradation ◽

Organic Pollutants ◽

Cuprous Oxide ◽

Recombination Rate ◽

Cupric Oxide ◽

Superior Performance ◽

Limiting Factors ◽

Charge Collection ◽

Cu2o Thin Films

A high recombination rate and low charge collection are the main limiting factors of copper oxides (cupric and cuprous oxide) for the photocatalytic degradation of organic pollutants. In this paper, a high performance copper oxide photocatalyst was developed by integrating cupric oxide (CuO) and cuprous oxide (Cu2O) thin films, which showed superior performance for the photocatalytic degradation of methylene blue (MB) compared to the control CuO and Cu2O photocatalyst. Our results show that a heterojunction photocatalyst of CuO–Cu2O thin films could significantly increase the charge collection, reduce the recombination rate, and improve the photocatalytic activity.

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