Thermally evaporated CdTe thin films for solar cell applications: Optimization of physical properties

Kumarasinghe, P.K.K.; Dissanayake, Amila; Pemasiri, K.; Dassanayake, B.S.

doi:10.1016/j.materresbull.2017.04.026

Cited by 26 publications

(12 citation statements)

References 35 publications

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“…High crystallite size and lowest dislocations and strain were noticed for CdTe thin films deposited at higher substrate temperature [2]. The smoothness of the material surface, as well as uniformity of film thickness, were good for thin films deposited at substrate temperatures between 200 o C -250 o C relatively to different substrate temperatures [2].…”

Section: (B) and (C)mentioning

confidence: 92%

“…2(a). Note that, the films grown on an optical glass substrate at 200 o C temperature show the surface smoothness and uniformity of thickness [2]. However, the films deposited on the glass substrate at a temperature of less than 200 o C reflect non-uniformity and rough surface [2,5&9].…”

Section: Methodsmentioning

confidence: 99%

“…Cadmium Telluride (CdTe) is an important semiconductor material which has a variety of uses in potential applications such as the construction of photovoltaic devices [1][2]. Usually, CdTe thin films are polycrystalline materials [3][4], can be synthesized by different deposition techniques [5][6].…”

Section: Introductionmentioning

confidence: 99%

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Raman and Ellipsometric Investigation of 570 nm CdTe thin film layer deposited by RF-Sputtering system

Reddy¹,

Hashemi²,

Verma³

et al. 2019

Opt. Pura Apl.

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In this work, we characterized the 570 nm CdTe layer deposited on a glass substrate by RF-Magnetron sputtering technique at the substrate temperature of 200 o C. Four experimental techniques were used in this study to characterize the thin film layer; Raman spectroscopy, Spectroscopic Ellipsometry, Xray dispersive spectroscopy (EDX) and high-resolution scanning electron microscopy (SEM). An elemental composition, the surface morphology and the phase of the thin film material were discussed. The optical properties such as refractive index, extinction coefficient, and absorption coefficient were investigated for CdTe thin film. The deposited thin film shows the maximum absorption in the visible spectrum which makes it an ideal candidate for photovoltaic applications.

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Section: (B) and (C)mentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

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Raman and Ellipsometric Investigation of 570 nm CdTe thin film layer deposited by RF-Sputtering system

Reddy¹,

Hashemi²,

Verma³

et al. 2019

Opt. Pura Apl.

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“…TiO 2 thin film is well-known as a direct band gap transition semiconductor, plots of the hυ vs the energy of the absorbed light affords the TiO 2 band gap [26]. The absorption coefficient (α) of TiO 2 thin films were calculated from the optical transmittance measurements using the following equation [27]:…”

Section: Optical Characteristicsmentioning

confidence: 99%

“…Generally, the rutile TiO 2 belongs to direct band gap semiconductor category [28]. Therefore, when n= 1/2 the band gap transition is allowed direct and the extrapolation of the linear region of (αhυ) 2 vs. hυ curve at α = 0 provides the direct energy band gap of TiO 2 thin film [27]; whereas n= 3/2 the band gap transition is forbidden direct. Moreover, the inset of Fig.3 shows the absorption spectra of the P3HT:PCBM active layer which shows four bands.…”

Section: Optical Characteristicsmentioning

confidence: 99%

Rutile TiO2 films as electron transport layer in inverted organic solar cell

Al‐Hashimi¹,

Kadem

Hassan

2018

J Mater Sci: Mater Electron

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Titanium dioxide (TiO 2 ) thin films were prepared by sol-gel spin coating method and deposited on ITO-coated glass substrates. The effects of different heat treatment annealing temperatures on the phase composition of TiO 2 films and its effect on the optical band gap, morphological, structural as well as using these layers in P3HT:PCBM-based organic solar cell were examined. The results show the presence of rutile phases in the TiO 2 films which were heat-treated for 2h at different temperatures (200 o C, 300 o C, 400 o C, 500 o C and 600 o C). The optical properties of the TiO 2 films have altered by temperature with a slight decrease in the transmittance intensity in the visible region with increasing the temperature. The optical band gap values were found to be in the range of 3.28-3.59eV for the forbidden direct electronic transition and 3.40-3.79eV for the allowed direct transition.TiO 2 layers were used as electron transport layer in inverted organic solar cells and resulted in a power conversion efficiency of 1.59% with short circuit current density of 6.64mA.cm -2 for TiO 2 layer heat-treated at 600 o C.

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Study of the Nonlinear Optical Properties of Ag/CdTe Composites

Wang,

Ding,

Zhang

et al. 2023

Physica Status Solidi (a)

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CdTe films, Ag nanoparticles, and Ag/CdTe composites have been successfully fabricated on substrates by means of the physical vapor deposition (PVD) process. The morphological structure, crystal growth and band gap of the samples were specifically characterized by scanning electron microscopy(SEM), X‐ray diffractometerand(XRD) and UV‐Vis spectrophotometer. Picosecond (ps) Z‐scan technology was used to investigate the nonlinear optical(NLO) properties of the composites under 532 nm. The results indicated that all samples exhibited saturated absorption(SA) nonlinear absorption properties and self‐dispersion nonlinear refraction properties. In addition, Ag nanoparticles can improve the NLO properties of Ag/CdTe composites, and this improvement is more obvious with the increase of Ag power. The results showed that the excellent properties of the Ag/CdTe composites are expected to make them an ideal material for use in the photoelectric field.This article is protected by copyright. All rights reserved.

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Thermally evaporated CdTe thin films for solar cell applications: Optimization of physical properties

Cited by 26 publications

References 35 publications

Raman and Ellipsometric Investigation of 570 nm CdTe thin film layer deposited by RF-Sputtering system

Raman and Ellipsometric Investigation of 570 nm CdTe thin film layer deposited by RF-Sputtering system

Rutile TiO2 films as electron transport layer in inverted organic solar cell

Study of the Nonlinear Optical Properties of Ag/CdTe Composites

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