Enhancement of optical and structural properties of vacuum evaporated CdTe thin films

Chander, Subhash; Purohit, A.; Lal, Chhagan; Dhaka, M.S.

doi:10.1016/j.matchemphys.2016.10.024

Cited by 56 publications

(14 citation statements)

References 44 publications

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“…To the present, one dimensional CdTe have been synthesized by different techniques which include laser-assisted catalysis growth (LCG) [11], vapor-liquid-solid (VLS) growth [12], solvothermal route [13], template-assisted technique, electrochemical fabrication [14,15], organometallic [16] and so on. Recent research on the improvement of optical and structural properties of CdTe thin films have been published by Chander, et al [17,18]. It was found that the estimated crystallographic and optical parameters alter with annealing temperature so that the electrical conductivity increases, and the resistivity decrease with increasing temperature [18].…”

Section: Introductionmentioning

confidence: 99%

Facile One-Pot Solvothermal Synthesis of Nanocrystalline CdTe with Different Shapes

Shahin¹,

Hamed²,

Razmara³

2019

Int J Nanoparticles Nanotech

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One dimensional Cadmium Telluride (CdTe) with different morphology was successfully synthesized via a solvothermal process by controlling the nature of precursors and solvents at a moderate temperature of 180 °C. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy analyses revealed that in all cases highly pure and crystallized CdTe with cubic zinc blende structure were obtained. Field emission scanning electron microscope (FE-SEM) analysis revealed that high aspect ratio CdTe nanowires, CdTe nanobelts, and CdTe nanorods were obtained in the presence of ethylenediamine, ethanolamine, and triethylenetetramine, respectively. Also, it was found that the solvents influence on the morphology of CdTe nanostructures. UV-Vis absorption spectra of CdTe nanostructures prepared under different conditions exhibited a blue shift relative to that of bulk CdTe due to the quantum size effect.

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Section: Introductionmentioning

confidence: 99%

Facile One-Pot Solvothermal Synthesis of Nanocrystalline CdTe with Different Shapes

Shahin¹,

Hamed²,

Razmara³

2019

Int J Nanoparticles Nanotech

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“…A Tauc Plot is commonly used to determine the optical bandgap of semiconducting materials in the research community. A Tauc plot generally shows the quantity of the abscissa (the energy of the light spectrum) and the quantity (αhν) 1/n on the ordinate, where α is the absorption coefficient of the material 42,43 . The equation used to determine the bandgap is expressed as follows:…”

Section: Resultsmentioning

confidence: 99%

WS2: A New Window Layer Material for Solar Cell Application

Sobayel

Amin

Alharbi

et al. 2020

Sci Rep

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Radio frequency (RF) magnetron sputtering was used to deposit tungsten disulfide (WS 2) thin films on top of soda lime glass substrates. The deposition power of RF magnetron sputtering varied at 50, 100, 150, 200, and 250 W to investigate the impact on film characteristics and determine the optimized conditions for suitable application in thin-film solar cells. Morphological, structural, and opto-electronic properties of as-grown films were investigated and analyzed for different deposition powers. All the WS 2 films exhibited granular morphology and consisted of a rhombohedral phase with a strong preferential orientation toward the (101) crystal plane. Polycrystalline ultra-thin WS 2 films with bandgap of 2.2 eV, carrier concentration of 1.01 × 10 19 cm −3 , and resistivity of 0.135 Ω-cm were successfully achieved at RF deposition power of 200 W. The optimized WS 2 thin film was successfully incorporated as a window layer for the first time in CdTe/WS 2 solar cell. initial investigations revealed that the newly incorporated WS 2 window layer in CdTe solar cell demonstrated photovoltaic conversion efficiency of 1.2% with V oc of 379 mV, J sc of 11.5 mA/cm 2 , and FF of 27.1%. This study paves the way for WS 2 thin film as a potential window layer to be used in thin-film solar cells.

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“…Among those considered, organic [5] solar cells, GaInP/GaInAs/Ge triple-junction solar cells [6,7], cadmium telluride (CdTe) cells [4,8], and copper indium gallium selenide cells [9] during operation. Among other types of thin-film solar cells, CdTe solar cells are suitable for both space flight and terrestrial applications due to their economic advantages relative to the production process and high specific power relative to their thickness [10][11][12]. However, the theoretical value of efficiency for such SC is currently unattainable.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…One of the reasons for the restrained achievement of the theoretical value of efficiency is the search for optimal contacts to film CdTe SC. For example, in [12] the authors investigated two types of SC: containing graphite paste, as well as Ag and Ni layers as the back contact. As a result of the studies of CdS/CdTe SC, the back contacts made using graphite paste and Ag, as well as graphite paste and Ni, showed similar efficiency values of about 12.5 % and FF at 66 %.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%