Crystallite size and intrinsic strain contribution in band gap energy redshift of ultrasonic-sprayed kesterite CZTS nanostructured thin films

Khammar, Merouane; Ynineb, F.; Guitouni, S.; Bouznit, Y.; Attaf, N.

doi:10.1007/s00339-020-03591-6

Cited by 26 publications

(11 citation statements)

References 45 publications

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“…27,28 Overall, the decrease in the band gap energy of CZTS thin films is suitable for solar cell device fabrication, which is assigned to the crystal superiority and grain size of the C 1 −C 3 sample. 29 3.4. Structural Analysis.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in the band gap energy is associated with the increase in the film thickness and internal compressive stress of CZTS films at higher temperatures. The formation of a bigger crystal helps to achieve the maximum absorption of light, and ultimately, the absorption edge of CZTS films shifts toward a longer wavelength (red shift). , Overall, the decrease in the band gap energy of CZTS thin films is suitable for solar cell device fabrication, which is assigned to the crystal superiority and grain size of the C 1 –C 3 sample …”

Section: Resultsmentioning

confidence: 99%

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Optoelectronic and Photovoltaic Properties of the Cu₂ZnSnS₄ Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Patil

Nadaf

Mali

et al. 2021

Ind. Eng. Chem. Res.

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In the present work, a one-step hydrothermal route was performed to develop the Cu2ZnSnS4 (CZTS) photoelectrode onto a conducting substrate. The photovoltaic performance of the homojunction CZTS photocathode was analyzed with a two-electrode cell system of FTO/CZTS/(0.3 M Eu3+–Eu2+)aq/graphite. An increase in reaction temperature shows a decrease in the band gap energy from 1.54 to 1.44 eV. The evolution of the kesterite CZTS structure with uniform and dense nanospheres was confirmed by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) studies. High resolution transmission electron microscopy (HR-TEM) and selected area electron diffraction (SAED) evaluations confirm the formation of polycrystalline thin films. The photoelectrochemical solar cell properties of CZTS (C1–C3) thin films demonstrate an increase in photoconversion efficiency (η) from 2.55 to 4.87% as a function of reaction temperature. The improvement in electrical conductivity and generation of lower R ct and R s of (C1–C3) thin films were confirmed using electrochemical impedance spectroscopy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optoelectronic and Photovoltaic Properties of the Cu₂ZnSnS₄ Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Patil

Nadaf

Mali

et al. 2021

Ind. Eng. Chem. Res.

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“…The band gap of the samples decreased due to the enhancement of crystallite size, owing to strong quantum confinement in nano-sized crystals. [37][38][39] Further, Maldar et al 18 observed a red shift in the band gap values. The decrease in the band gap energy was ascribed to improvement of the crystallinity of thin film with increasing temperature.…”

Section: Optical Propertiesmentioning

confidence: 93%

“…It was known that there was a strong relation between the crystallite size and the optical band gaps for the solar absorber materials. The band gap of the samples decreased due to the enhancing of crystallite size, owing to strong quantum confinement in nano sized crystals [37][38][39]. Further, Maldar et al [18] observed red shift in the band gap values.…”

Section: Optical Propertiesmentioning

confidence: 94%

Role of carbon quantum dot for enhanced performance of photo-absorption in Cu₂CoSnS₄ superstrate solar cell device

Sivagami

Priyadarshini

2022

Mater. Adv.

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“…A brief literature overview shows that the majority of CZTS compounds crystalize as orthorhombic with space group Pmn2

as tetragonal with space group I

2m and I

, which are related to the wurtzite or zinc blend, respectively [ 15 ]. They are known to have a direct band gap of around 1.5–1.97 eV [ 7 , 16 ], with a favorable optical absorption coefficient of about

–

[ 17 , 18 , 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Strain Effects on the Electronic and Optical Properties of Kesterite Cu2ZnGeX4 (X = S, Se): First-Principles Study

et al. 2021

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Following the chronological stages of calculations imposed by the WIEN2K code, we have performed a series of density functional theory calculations, from which we were able to study the effect of strain on the kesterite structures for two quaternary semiconductor compounds Cu2ZnGeS4 and Cu2ZnGeSe4. Remarkable changes were found in the electronic and optical properties of these two materials during the application of biaxial strain. Indeed, the band gap energy of both materials decreases from the equilibrium state, and the applied strain is more pronounced. The main optical features are also related to the applied strain. Notably, we found that the energies of the peaks present in the dielectric function spectra are slightly shifted towards low energies with strain, leading to significant refraction and extinction index responses. The obtained results can be used to reinforce the candidature of Cu2ZnGeX4(X = S, Se) in the field of photovoltaic devices.

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Crystallite size and intrinsic strain contribution in band gap energy redshift of ultrasonic-sprayed kesterite CZTS nanostructured thin films

Cited by 26 publications

References 45 publications

Optoelectronic and Photovoltaic Properties of the Cu₂ZnSnS₄ Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Optoelectronic and Photovoltaic Properties of the Cu₂ZnSnS₄ Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Role of carbon quantum dot for enhanced performance of photo-absorption in Cu₂CoSnS₄ superstrate solar cell device

Strain Effects on the Electronic and Optical Properties of Kesterite Cu2ZnGeX4 (X = S, Se): First-Principles Study

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Crystallite size and intrinsic strain contribution in band gap energy redshift of ultrasonic-sprayed kesterite CZTS nanostructured thin films

Cited by 26 publications

References 45 publications

Optoelectronic and Photovoltaic Properties of the Cu2ZnSnS4 Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Optoelectronic and Photovoltaic Properties of the Cu2ZnSnS4 Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Role of carbon quantum dot for enhanced performance of photo-absorption in Cu2CoSnS4 superstrate solar cell device

Strain Effects on the Electronic and Optical Properties of Kesterite Cu2ZnGeX4 (X = S, Se): First-Principles Study

Contact Info

Product

Resources

About

Optoelectronic and Photovoltaic Properties of the Cu₂ZnSnS₄ Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Optoelectronic and Photovoltaic Properties of the Cu₂ZnSnS₄ Photocathode by a Temperature-Dependent Facile Hydrothermal Route

Role of carbon quantum dot for enhanced performance of photo-absorption in Cu₂CoSnS₄ superstrate solar cell device