Optical absorption behaviour of evaporated CuxS thin films

Rastogi, A. C.; Salkalachen, S.

doi:10.1016/0040-6090(82)90228-0

Cited by 43 publications

(19 citation statements)

References 26 publications

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“…The reason for the difference between the reported values depends on the crystal structure of polymorphic compound CTS, where 0.98 eV was measured for a cubic phase and 1.35 eV for a tetragonal phase [19]. The polymorphic state of grown CTS depends on the growing temperature, where the cubic phase is known to form at high temperatures (>775°C) and the monoclinic and triclinic as well as the tetragonal phases are low-temperature phases (<775°C) [17,49]. It can be said that the estimated results decrease with increasing PEG amount and are in good agreement with literature values.…”

Section: Optical Resultsmentioning

confidence: 84%

Polyethylene glycol-assisted growth of Cu₂SnS₃ promising absorbers for thin film solar cell applications

Kahraman

Çetinkaya

Yaşar

et al. 2014

Philosophical Magazine

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In this paper, we report, for the first time, the results of the polyethylene glycol-(PEG) assisted preparation and characterization of high-quality and well-crystallized Cu 2 SnS 3 (CTS) thin films obtained using sol-gel spin-coating method and a subsequent annealing in a sulphur atmosphere. Structural, morphological, compositional, electrical and optical investigations were carried out. The X-ray diffraction patterns of the samples proved the polycrystalline nature and preferred crystallization of the films. No peak referring to other binary or ternary phases were detected in the patterns. The intensity of the preferred orientation and crystallite size of the films increased with increasing PEG content. This trend yielded an improvement in photo-transient currents of the PEG-assisted growth of CTS films. The scanning electron microscopy images revealed that the CTS films have continuous, dense and agglomeration-like morphology. Through energy dispersive X-ray spectroscopy studies, it has been deduced that the samples consist of Cu, Sn and S of which atomic percentages were consistent with Cu/Sn and S/metal initial ratios. The agglomerated morphology of the samples has been attributed to increasing PEG content. A remarkable enhancement was observed in photo-transient currents of p-n junction of the produced films along with increasing PEG content. Through resistivity-temperature measurements, three impurity level electrical activation energy values for each film were found. Optical band gap values of the films were estimated via absorbance-wavelength behaviours and decreased with increasing PEG content. It has been revealed that PEG-assisted growth of CTS thin films is a promising way to improve its photovoltaic characteristics.

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Section: Optical Resultsmentioning

confidence: 84%

Polyethylene glycol-assisted growth of Cu₂SnS₃ promising absorbers for thin film solar cell applications

Kahraman

Çetinkaya

Yaşar

et al. 2014

Philosophical Magazine

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“…Direct band gap values of samples with pH values 6, 7, and 8 were found to be 1.3 eV, 1.35 eV, and 1.4 eV, respectively [3]. However, the sample with pH 9 has band gap 1.8 eV which corresponds to the Cu x S [31]. The change in the optical band gap of this sample is due to compositional difference.…”

Section: Optical Properties Optical Band Gap Of Czts Nanoparticles Wmentioning

confidence: 81%

Effect of pH on the Characteristics of Cu₂ZnSnS₄Nanoparticles

Lydia

Reddy

2013

ISRN Condensed Matter Physics

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We have investigated the effect of pH on the structural and optical properties of chemical coprecipitated Cu 2 ZnSnS 4 (CZTS) nanoparticles. The CZTS nanoparticles have been successfully synthesized at different pH values ranging from 6 to 9, keeping all other deposition parameters as constant. X-ray diffraction and Raman studies confirmed the Kesterite structure. The powders synthesized at a pH value of 8 exhibited preferred orientation along (112) and (220) with near stoichiometric ratio. The as synthesized nanoparticles exhibited direct band gap of 1.4 eV which is an optimum value for the absorber layer in the fabrication of photovoltaic cells.

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“…where Nt is the density of trap states, ε r is the relative dielectric constant, ε 0 is the vacuum dielectric constant, R is the grain radius, α 0 is the value of the absorption coefficient at the photon energy hν¼E g , E g is the band-gap energy, B is given by αhν [8,27,28]. The results of the optical measurements showed the formation of secondary phases depending on deposition conditions.…”

Section: Resultsmentioning

confidence: 97%

Electrical properties of sprayed Cu2ZnSnS4 thin films and its relation with secondary phase formation and solar cell performance

Vigil‐Galán

Courel

Espíndola‐Rodríguez

et al. 2015

Solar Energy Materials and Solar Cells

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Optical absorption behaviour of evaporated CuxS thin films

Cited by 43 publications

References 26 publications

Polyethylene glycol-assisted growth of Cu₂SnS₃ promising absorbers for thin film solar cell applications

Polyethylene glycol-assisted growth of Cu₂SnS₃ promising absorbers for thin film solar cell applications

Effect of pH on the Characteristics of Cu₂ZnSnS₄Nanoparticles

Electrical properties of sprayed Cu2ZnSnS4 thin films and its relation with secondary phase formation and solar cell performance

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Optical absorption behaviour of evaporated CuxS thin films

Cited by 43 publications

References 26 publications

Polyethylene glycol-assisted growth of Cu2SnS3 promising absorbers for thin film solar cell applications

Polyethylene glycol-assisted growth of Cu2SnS3 promising absorbers for thin film solar cell applications

Effect of pH on the Characteristics of Cu2ZnSnS4Nanoparticles

Electrical properties of sprayed Cu2ZnSnS4 thin films and its relation with secondary phase formation and solar cell performance

Contact Info

Product

Resources

About

Polyethylene glycol-assisted growth of Cu₂SnS₃ promising absorbers for thin film solar cell applications

Polyethylene glycol-assisted growth of Cu₂SnS₃ promising absorbers for thin film solar cell applications

Effect of pH on the Characteristics of Cu₂ZnSnS₄Nanoparticles