Physical properties evaluation of various substrates coated cupric oxide thin films by dip method

Dhanasekaran, V.; Mahalingam, T.

doi:10.1016/j.jallcom.2012.05.092

Cited by 34 publications

(20 citation statements)

References 23 publications

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“…The band gap value of the deposited film are found to be 2.39, 2.31 and 2.20 eV for films obtained on SnO 2 :F, SnO 2 for SnO 2 :In substrates. Variation in band gap value of the deposited films may be due to usage of different substrates [25]. The band gap value obtained in the present work must be closer to the value reported earlier [26].…”

Section: Optical Absorption Analysissupporting

confidence: 86%

“…4a-c. The observation of slight change in surface morphology may be due to usage of different substrates [25]. The grains are found to be spherical in shape with non uniform surface coverage which is indicated in Fig.…”

Section: Morphological and Compositional Analysesmentioning

confidence: 89%

“…It is noted that, films with higher thickness value having lower crystallite size and lower thickness value having higher crystallite size may be due to the quantum confinement effect produced by the usage of various substrates [25]. The value of microstructural parameters such as crystallite size, strain and dislocation density are calculated using XRD data and given in Table 1.…”

Section: X-ray Diffractionmentioning

confidence: 99%

“…The change in value of optical transmittance of the deposited films may be due to usage of different substrates [25]. Transmittance spectra recorded for Cu 2 S thin films obtained on SnO 2 :F, SnO 2 and SnO 2 :In substrates are shown in Fig.…”

Section: Optical Absorption Analysismentioning

confidence: 99%

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Effect of substrate on electroplated copper sulphide thin films

Bharathi¹,

Thanikaikarasan²,

Kollu

et al. 2014

J Mater Sci: Mater Electron

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Copper Sulphide thin films have been prepared on different substrates using electrodeposition technique. X-ray diffraction analysis showed that the prepared films possess polycrystalline in nature with cubic structure. Microstructural parameters such as crystallite size, strain and dislocation density are determined using X-ray diffraction data. Film composition and surface morphology have been analyzed using Scanning electron microscopy and Energy dispersive analysis by X-rays. Optical absorption analysis showed that the prepared films possess band gap value in the range between 2.2 and 2.4 eV for films obtained on different substrates.

show abstract

Section: Optical Absorption Analysissupporting

confidence: 86%

Section: Morphological and Compositional Analysesmentioning

confidence: 89%

Section: X-ray Diffractionmentioning

confidence: 99%

Section: Optical Absorption Analysismentioning

confidence: 99%

See 2 more Smart Citations

Effect of substrate on electroplated copper sulphide thin films

Bharathi¹,

Thanikaikarasan²,

Kollu

et al. 2014

J Mater Sci: Mater Electron

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“…The calculated crystallite size values are provided in Table 1. The microstructural properties were estimated using relations (1) and (2) for ZnO based nanocomposites [19]. The microstrain ( ) values were calculated using…”

Section: Resultsmentioning

confidence: 99%

Optical and Structural Properties of Solvent Free Synthesized Starch/Chitosan-ZnO Nanocomposites

Sanmugam

Vikraman

Venkatesan

et al. 2017

Journal of Nanomaterials

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The objective of this work is to develop an environmentally friendly method for preparation of ZnO nanocomposites. ZnO nanocomposites were prepared by three natural fibers such as coir, sawdust, and chitosan using aqueous solution of zinc chloride and sodium hydroxide. The functional groups of ZnO, C=O for polysaccharide, and N-H bending vibration of amine were confirmed by FTIR spectroscopy. A new high intensity absorption band has been observed at 424 cm −1 which corresponds to the E 2 mode of hexagonal ZnO. The crystallinity and phase formation of coir, chitosan, and sawdust combined ZnO nanocomposites were confirmed by X-ray diffraction patterns. XRD patterns revealed the polycrystalline nature of ZnO composites belonging to the hexagonal phase with (101) preferential lattice orientation. The microstructural parameters were calculated for coir, chitosan, and saw wood combined ZnO composites. Also texture coefficients were estimated for all the diffraction lines of ZnO based nanocomposites. SEM and TEM analyses confirmed evenly distributed nanosized grains in the ZnO composites. The UV-Vis absorption spectra were observed where the blue shift absorption peak was at 334 nm. The optical band gap values were estimated in the range of 3.18-3.26 eV. The emission peak was observed at ∼388 nm and ∼463 nm by photoluminescence spectroscopy.

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Tuning the Surface Properties of CuO Films Using the Precursor Aging Approach for Enhanced Photoelectrocatalytic Reactions

Kyesmen,

Nombona,

Diale

2023

Adv Materials Inter

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The surface properties of semiconductors have a significant influence on their photoelectrocatalytic efficiency. This research presents a precursor aging method for tuning the surface properties of CuO films, for enhanced catalytic response. A precursor solution made using copper acetate, polyethylene glycol (PEG) 400, and diethanolamine, and aged for 1, 40, 80, 120, 150, 180, and 250 days is used in each case to fabricate CuO photocathodes via the dip‐coating method. The films fabricated using the 1‐day‐old precursor reveal compact and homogeneous nanoparticles. The films eventually get tuned to yield highly porous and rougher surfaces after aging the precursors for 180–250 days. The film's bandgap decreases by 9% after 180–250 days of precursor aging. Photocathodes prepared using the 180‐day‐old precursor produce the optimum photocurrent density of 1.6 mA cm−2 at 0.35 V versus reversible hydrogen electrode (RHE), representing a 196% increase relative to the films fabricated using the 1‐day‐old solution. They also produce an anodic onset potential shift of 260 mV. This improved photoelectrocatalytic response is due to the porous morphology of the films, which produces a larger surface area that enhances light absorption, increases active sites for catalytic reactions, and reduces charge transfer resistance at the photocathode‐electrolyte interface.

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Physical properties evaluation of various substrates coated cupric oxide thin films by dip method

Cited by 34 publications

References 23 publications

Effect of substrate on electroplated copper sulphide thin films

Effect of substrate on electroplated copper sulphide thin films

Optical and Structural Properties of Solvent Free Synthesized Starch/Chitosan-ZnO Nanocomposites

Tuning the Surface Properties of CuO Films Using the Precursor Aging Approach for Enhanced Photoelectrocatalytic Reactions

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