Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films

Shukla, R. K.; Srivastava, Anchal; Kumar, Nishant; Pandey, Akhilesh; Pandey, Mamta

doi:10.1155/2015/172864

Cited by 34 publications

(15 citation statements)

References 29 publications

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“…From images shown in Figure 4, it was found that the undoped Cr 2 O 3 film had a surface more or less smooth. For the others, it is clear that the surface morphology of the films strongly depends on the Cu content [37], as long as these films seem to have more porosity compared to the undoped film.…”

Section: Results and Discussion A) Structural Characterizationmentioning

confidence: 99%

Synthesis and characterization of Cu doped chromium oxide (Cr₂O₃) thin films

Zekaik

Benhebal

Benrabah

2019

High Temperature Materials and Processes

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Cu-doped Cr2O3 thin films were deposited onto glass substrate by the sol–gel dip-coating (SGDC) process using dopant values of 0, 3, 6, 9 and 12%. The Chromium (III) Nitrate Nonahydrate [Cr(NO3)3·9H2O] was used as a Cr source, whilst for the dopant, the corresponding nitrate (Cu(NO3)2) was used. The crystal structure, as well as the optical and electrical properties were examined. XRD data showed that the films with a high degree of crystallinity were rhombohedral Cr2O3 phase. The crystallite size reduces with increase in Cu doping proportion. The AFM results indicate a decrease in the surface roughness of the doped Cr2O3: Cu thin films. The UV-Vis spectra of the Cu doped-Cr2O3 films showed high transparency in the visible region. The optical band gap of Cr2O3 thin films decreases with increasing in Cu doping rate. The Nyquist plot shows that the equivalent circuit of Cu doped-Cr2O3 films is a parallel circuit RpCp. As the concentration of Cu increases, Resistance RP regresses while capacitance Cp increases.

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Section: Results and Discussion A) Structural Characterizationmentioning

confidence: 99%

Synthesis and characterization of Cu doped chromium oxide (Cr₂O₃) thin films

Zekaik

Benhebal

Benrabah

2019

High Temperature Materials and Processes

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“…The studies of semiconductor nanoparticles trigger have a big attention in the last years, that is due to their optical uniqueness and electrical properties (1).Recently, the synthesis characterization and processing of nanostructure materials are emerging and rapidly growing research work (1,2). Zinc oxide is a versatile material and well known to have a direct band gap of 3.37 eV at room temperature and has distinguishable performance in electronics, optics and photonics (3,4,5,6). Among the semiconductor nanoparticles, zinc oxide is an important II-VI semiconductor, which has been researched extensively,according to its broad spectrum of potential applications such as in catalysts (7).…”

Section: Introductionmentioning

confidence: 99%

Fabricated of Cu Doped ZnO Nanoparticles for Solar Cell Application

Journal¹

2018

Baghdad Sci.J

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Copper with different concentrations doped with zinc oxide nanoparticles were prepared from a mixture of zinc acetate and copper acetate with sodium hydroxide in aqueous solution. The structure of the prepared samples was done by X-ray diffraction, atomic force microscopy (AFM) and UV-VIS absorption spectrophotometer. Debye-Scherer formula was used to calculate the size of the prepared samples. The band gap of the nanoparticle ZnO was determined by using UV-VIS optical spectroscopy.

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“…Many works have been published on the use of Cu for sensing different gases [ 14 , 15 , 16 , 17 ]. It is assumed that Cu 1+ ions substitute for the Zn 2+ in the ZnO lattice, reducing the electron concentration, and hence, a higher electrical resistivity is observed [ 18 , 19 , 20 , 21 , 22 ]. Cu-doped ZnO thin films have been prepared by several deposition techniques, such as pulsed-laser deposition, magnetron sputtering, spray pyrolysis and the sol-gel process [ 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Cu-Doped ZnO Thin Films Deposited by a Sol-Gel Process Using Two Copper Precursors: Gas-Sensing Performance in a Propane Atmosphere

et al. 2016

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A study on the propane gas-sensing properties of Cu-doped ZnO thin films is presented in this work. The films were deposited on glass substrates by sol-gel and dip coating methods, using zinc acetate as a zinc precursor, copper acetate and copper chloride as precursors for doping. For higher sensitivity values, two film thickness values are controlled by the six and eight dippings, whereas for doping, three dippings were used, irrespective of the Cu precursor. The film structure was analyzed by X-ray diffractometry, and the analysis of the surface morphology and film composition was made through scanning electron microscopy (SEM) and secondary ion mass spectroscopy (SIMS), respectively. The sensing properties of Cu-doped ZnO thin films were then characterized in a propane atmosphere, C3H8, at different concentration levels and different operation temperatures of 100, 200 and 300 °C. Cu-doped ZnO films doped with copper chloride presented the highest sensitivity of approximately 6 × 104, confirming a strong dependence on the dopant precursor type. The results obtained in this work show that the use of Cu as a dopant in ZnO films processed by sol-gel produces excellent catalysts for sensing C3H8 gas.

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Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films

Cited by 34 publications

References 29 publications

Synthesis and characterization of Cu doped chromium oxide (Cr₂O₃) thin films

Synthesis and characterization of Cu doped chromium oxide (Cr₂O₃) thin films

Fabricated of Cu Doped ZnO Nanoparticles for Solar Cell Application

Cu-Doped ZnO Thin Films Deposited by a Sol-Gel Process Using Two Copper Precursors: Gas-Sensing Performance in a Propane Atmosphere

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Optical and Sensing Properties of Cu Doped ZnO Nanocrystalline Thin Films

Cited by 34 publications

References 29 publications

Synthesis and characterization of Cu doped chromium oxide (Cr2O3) thin films

Synthesis and characterization of Cu doped chromium oxide (Cr2O3) thin films

Fabricated of Cu Doped ZnO Nanoparticles for Solar Cell Application

Cu-Doped ZnO Thin Films Deposited by a Sol-Gel Process Using Two Copper Precursors: Gas-Sensing Performance in a Propane Atmosphere

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Synthesis and characterization of Cu doped chromium oxide (Cr₂O₃) thin films

Synthesis and characterization of Cu doped chromium oxide (Cr₂O₃) thin films