Effect of pH on the Synthesis of Cobalt Selenide Films by SILAR Method

Soonmin, Ho; Ng, Sha Shiong

doi:10.13005/ojc/370404

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…To enhance the performance of CoSe nano material several researchers have used the doping technique to make nano materials of Yb:CoSe [5,15], CoSe.MoSe [13], Er:CoSe [3,14], Zr:CoSe [16] prepared using several deposition techniques such as Spray pyrolysis, Electrodeposition, Chemical bath, SILAR [16][17][18][19][20][21][22][23][24]. Imosobomeh et al investigated the impact of temperature on spray synthesized CoSe doped with Zr [16].…”

Section: Introductionmentioning

confidence: 99%

Impact of temperature difference on the features of spray deposited yttrium doped cobalt selenide (YCoSe) thin films for photovoltaic application

Akpu,

Okpechi,

Elizabeth

et al. 2023

Afr. Sci. Rep.

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In this investigation, spray deposited yttrium doped cobalt selenide (YCoSe) thin materials were synthesized in soda lime glass and the impact of substrate temperature (140 oC, 160 oC, 180 oC and 200 oC) on their elemental composition, surface morphology, structural, electrical and optical properties were investigated using scanning electron microscopy-SEM X-ray diffraction –XRD, four-point probe and UV-VIS spectrophotometer respectively. The EDX plots of the deposited undoped and Y-doped cobalt selenide revealed the major elements: cobalt, selenium and yttrium. This confirms the deposition of CoSe and Y-doped CoSe thin materials. The morphology of undoped CoSe thin materials was very rough containing randomly oriented non-uniform thin particles while addition of Y dopant (0.1 mol%) at substrate temperature of 140 oC gave a homogenous distribution of compact rectangular-like nanograins. The XRD result shows that the films are cubic polycrystalline in nature and the film grown at substrate temperature of 180 oC was seen to give the most excellent crystalline quality and a preferential orientation along (111) direction. From electrical results it was observed that increase in substrate temperature increased the film thickness with decreased resistivity and increased conductivity. The optical properties were found to vary with substrate temperature despite the fact that the variation was not totally linear, as the film deposited at substrate temperature of 160 oC deviated from the linearity in all the optical properties. The energy band gap of the deposited samples ranges from 1.25 eV–1.75 eV. The materials produced could be used in the production of photovoltaic devices.

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Section: Introductionmentioning

confidence: 99%

Impact of temperature difference on the features of spray deposited yttrium doped cobalt selenide (YCoSe) thin films for photovoltaic application

Akpu,

Okpechi,

Elizabeth

et al. 2023

Afr. Sci. Rep.

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Optical, and electrochemical performance of selenium decorated reduced graphene oxide assisted (CoSe2) nanoparticles for oxygen reduction reaction

Ajith¹,

Agnes²,

Muthu³

et al. 2022

Materials Today: Proceedings

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Recent Advances in the Growth and Characterizations of SILAR-Deposited Thin Films

Soonmin

2022

Applied Sciences

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Many researchers have reported on the preparation and characterization of thin films. The prepared thin films could be used in lasers, cathodic ray tubes, solar cells, infrared windows, ultraviolet light emitting diodes, sensors, supercapacitors, biologic applications, and optoelectronic applications. The properties of these thin films strongly depend on the deposition techniques. Throughout the years, many investigations into the production of various types of thin films (by using the successive ionic layer adsorption and reaction (SILAR) method) were conducted. This method attracts interest as it possesses many advantages when compared to other deposition methods. For example, large area depositions could be carried out in any substrates at lower temperatures via inexpensive instruments; moreover, a vacuum chamber is not required, it has an excellent growth rate, and the unique film properties could be controlled. In this work, metal sulfide, metal selenide, metal oxide, and metal telluride were deposited on substrates by using the SILAR method. According to the findings, both thick and thin films could be synthesized under specific conditions during the experiment. Additionally, the results showed that the number of deposition cycles, rinsing times, immersion times, and concentrations of the precursors affected the crystallinities, grain sizes, film thicknesses, surface roughness, and shapes of the obtained films. These films could be used in solar cell applications with high power conversion efficiency due to the appropriate band gap value and high absorption coefficient value.

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Effect of pH on the Synthesis of Cobalt Selenide Films by SILAR Method

Cited by 3 publications

References 51 publications

Impact of temperature difference on the features of spray deposited yttrium doped cobalt selenide (YCoSe) thin films for photovoltaic application

Impact of temperature difference on the features of spray deposited yttrium doped cobalt selenide (YCoSe) thin films for photovoltaic application

Optical, and electrochemical performance of selenium decorated reduced graphene oxide assisted (CoSe2) nanoparticles for oxygen reduction reaction

Recent Advances in the Growth and Characterizations of SILAR-Deposited Thin Films

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