Preparation and characterization of optical and electrical properties of copper selenide sulfide polycrystalline thin films

Mansour, B. A.; Zawawi, I. K. El; Elsayed-Ali, Hani E.; Hameed, Talaat A.

doi:10.1016/j.jallcom.2017.12.067

Cited by 22 publications

(11 citation statements)

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“…In addition, combined with ion beam, laser or photolithography technology, various artificially defined three-dimensional micro-nano structures can be produced, which is convenient for people to understand the relationship between thermoelectric properties and material structure in essence. Many methods have been reported for preparing Cu 2 Se thin films, such as electrochemical deposition [ 21 , 22 , 23 ], pulsed laser deposition [ 24 , 25 ], spin-coating [ 20 , 26 , 27 ], sputtering [ 28 ], thermal evaporation [ 29 , 30 ], etc. For the influence of these preparation methods on the film and the advantages of magnetron sputtering, please refer to our previous article [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Cu2Se Nano-Thin Film by Magnetron Sputtering

et al. 2021

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Thermoelectric technology can achieve mutual conversion between thermoelectricity and has the unique advantages of quiet operation, zero emissions and long life, all of which can help overcome the energy crisis. However, the large-scale application of thermoelectric technology is limited by its lower thermoelectric performance factor (ZT). The thermoelectric performance factor is a function of the Seebeck coefficient, electrical conductivity, thermal conductivity and absolute temperature. Since these parameters are interdependent, increasing the ZT value has always been a challenge. Here, we report the growth of Cu2Se thin films with a thickness of around 100 nm by magnetron sputtering. XRD and TEM analysis shows that the film is low-temperature α-Cu2Se, XPS analysis shows that about 10% of the film’s surface is oxidized, and the ratio of copper to selenium is 2.26:1. In the range of 300–400 K, the maximum conductivity of the film is 4.55 × 105 S m−1, which is the maximum value reached by the current Cu2Se film. The corresponding Seebeck coefficient is between 15 and 30 µV K−1, and the maximum ZT value is 0.073. This work systematically studies the characterization of thin films and the measurement of thermoelectric properties and lays the foundation for further research on nano-thin-film thermoelectrics.

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Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Cu2Se Nano-Thin Film by Magnetron Sputtering

et al. 2021

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“…From our observation, we found that the efficiency of the prepared films is lower than that of the CZTS films and is attributed to the presence of secondary phases, which reduces the optical absorption and lowers the crystallite size; the larger size particle is very advantageous for solar cells, which influences higher diffusion length. The presence of p-type impurities (SnSe and CuSe) may form diode/insulating nature in the absorbing layer, 58,59 which causes high photocarrier recombination and hence affects the PEC performances of the host atoms. 60 We further investigated the electrical properties of the photoanodes via EIS.…”

Section: Resultsmentioning

confidence: 99%

Influence of Substrates on the Photoelectrochemical Performances of Ag₂ZnSnSe₄ Thin Films

2019

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This work describes the photoelectrochemical (PEC) performance of Ag 2 ZnSnSe 4 (AZTSe) thin films prepared on various conductive substrates such as Al, Cu, Ag, and conventional glass by a thermal evaporation method. The X-ray diffraction analysis confirms that the deposited films are the pure tetragonal structure of AZTSe. The scanning electron microscope (SEM) images show polygonal-shaped and spherical-rich particles, which are uniformly distributed over the substrates and are densely packed. By comparing the SEM images, the average particle size of Ag/AZTSe film seems to be higher than that of the other films. The energy-dispersive X-ray analysis is witnessed for nearly stoichiometric values for the films. The optical absorption coefficient of AZTSe thin films is found to be about 10 4 cm −1 and its band gap is found in the range of 1.54−2.15 eV. The Mott−Schottky plot shows n-type conductivity for all of the films. The J−V plot confirms the photoactivity for all of the films. Among the films, the Ag/AZTSe film shows higher power conversion efficiency of about 0.32%. However, further investigation is needed to optimize the thickness of the conductive layer for improving the efficiency of photoelectrochemical cell in comparison to that of the industrially established materials.

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“…Cu 1.8 Se 0.6 S 0.4 nanopowder was prepared from pure elements, namely, copper, selenium, and sulfur, by a solid-state reaction. , This method is used when there is a significant difference in the melting points between chemical constituents. The highly pure elements (Cu, Se, and S) were weighed according to their stoichiometric ratio (1.8:0.6:0.4).…”

Section: Methodsmentioning

confidence: 99%

“…The final product is Cu 1.8 Se 0.6 S 0.4 which matched with XRD data and former work. 34 After the discharge (Figure 3b), the atomic ratio was slightly changed, and The pristine sample comprises relatively highly dense nanospheres or nanocubes with a regular shape. The particles are highly compacted and interconnected, making a conductive network, and some particles were superimposed on each other.…”

Section: Hrtem Studymentioning

confidence: 99%

“…This article validates the reported HFE electrolytes using Cu 1.8 Se 0.6 S 0.4 to overcome the corrosive nature of chlorine and poor chemical stability and to mitigate the interaction between magnesium and the electrolyte, thus providing a high surface area for the practical application of Mg rechargeable batteries. 34,35 This method is used when there is a significant difference in the melting points between chemical constituents. The highly pure elements (Cu, Se, and S) were weighed according to their stoichiometric ratio (1.8:0.6:0.4).…”

Section: Introductionmentioning

confidence: 99%

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Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Mohammad H. Al Sulami,

Alsabban,

Al-Sulami

et al. 2023

Langmuir

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Copper selenide (Cu–Se) and copper sulfide (Cu–S) are promising cathodes for magnesium-ion batteries. However, the low electronic conductivity of Cu–Se system results in a poor rate capability and unsatisfactory cycling performance. Mg-ion batteries based on the Cu–S cathode exhibited large kinetic barriers during the recharging process owing to the presence of polysulfide species. This work attempts to circumvent this dilemma by doping Cu1.8Se by sulfur, which replaces the selenium in the CuSe lattice to form Cu1.8Se0.6S0.4 nanocrystalline powder. The presence of sulfur will increase the electronic conductivity, and the presence of selenium will mitigate the effect of polysulfide species that hinder the kinetics of Mg2+. Herein, a Cu1.8Se0.6S0.4 nanocrystalline powder was synthesized by the solid-state reaction, yielding a highly pure and stoichiometric powder. The crystallographic structure of the nanopowder and the conversion-type storage mechanism have been attested via ex situ X-ray diffraction and energy-dispersive X-ray analysis. The nanocrystalline feature of Cu1.8Se0.6S0.4 was demonstrated by high-resolution transmission electron microscopy. An apparent surface morphology change during the charging/discharging process has been visualized by a field emission scanning electron microscope. Diffuse reflectance spectroscopy has discussed the variation of the band gap during charging and discharging. The full Mg/Cu1.8Se0.6S0.4 cells presented an initial discharge capacity of 387.99 mAh g– 1 at a current density of 0.02 mA cm–2; moreover, they show moderate diffusion kinetics with ≈ 10–15 cm–2 s–1.

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Preparation and characterization of optical and electrical properties of copper selenide sulfide polycrystalline thin films

Cited by 22 publications

References 50 publications

Thermoelectric Properties of Cu2Se Nano-Thin Film by Magnetron Sputtering

Thermoelectric Properties of Cu2Se Nano-Thin Film by Magnetron Sputtering

Influence of Substrates on the Photoelectrochemical Performances of Ag₂ZnSnSe₄ Thin Films

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

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Preparation and characterization of optical and electrical properties of copper selenide sulfide polycrystalline thin films

Cited by 22 publications

References 50 publications

Thermoelectric Properties of Cu2Se Nano-Thin Film by Magnetron Sputtering

Thermoelectric Properties of Cu2Se Nano-Thin Film by Magnetron Sputtering

Influence of Substrates on the Photoelectrochemical Performances of Ag2ZnSnSe4 Thin Films

Nanosynthesis and Characterization of Cu1.8Se0.6S0.4 as a Potential Cathode for Magnesium Battery Applications

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Influence of Substrates on the Photoelectrochemical Performances of Ag₂ZnSnSe₄ Thin Films

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications