Investigation of absorber and heterojunction in the pure sulphide kesterite

Tamin, Charif; Chaumont, Denis; Heintz, O.; Chassagnon, R.; Leray, Aymeric; Geoffroy, Nicolas; Guerineau, Maxime; Adnane, M.

doi:10.1016/j.bsecv.2020.05.004

Cited by 7 publications

(3 citation statements)

References 38 publications

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“…Figure 3a shows the Raman spectra of the CZTS sample. The appearance of the high-intensity peaks at about 288 cm À1 and 337.5 cm À1 corresponds to the two A modes of the kesterite structure whereas the less intense peaks at 366.3 cm À1 and 373 cm À1 correspond to the E(LO) and B(LO) modes [29][30][31][32]. Figure 3b shows the Raman spectra of the CCZTS sample.…”

Section: Morphological and Structural Characterizationmentioning

confidence: 99%

Improvement of hetero-interface engineering by partial substitution of Zn in Cu₂ZnSnS₄-based solar cells

et al. 2022

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This paper investigates the effects of partial substitution of zinc (Zn) in pure sulfide kesterite (Cu2ZnSnS4) by cadmium (Cd) and manganese (Mn) incorporation. Thin films of Cu2ZnSnS4 (CZTS), Cu2Zn1–xCdxSnS4 (CCZTS) and Cu2Zn1–xMnxSnS4(CMZTS) were produced chemically. A comparison of pure CZTS with CCZTS and CMZTS was performed to study the influence of Cd and Mn incorporation on the morphology, structure, optical and electronic properties of the films. The results show an improvement of the morphology and an adjustment of the band gap and valence band position by partial substitution of Zn with Cd and Mn. In addition, for the first time, the band alignment at the absorber/buffer hetero-interface is studied with partial Zn substitution. Band alignments at the absorber/buffer hetero-interface were estimated by XPS and UV/Visible measurements. The results show a cliff-like CBO for CZTS/CdS heterojunction, a spike-like CBO for CCZTS/CdS and a near flat-band CBO for CMZTS/CdS heterojunction.

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Section: Morphological and Structural Characterizationmentioning

confidence: 99%

Improvement of hetero-interface engineering by partial substitution of Zn in Cu₂ZnSnS₄-based solar cells

et al. 2022

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“…The preparation work-up and, specifically, the drying stage in air in the “wet” mechanochemical synthesis method, constitutes yet another oxygen source, possibly even more acute, since one deals at this stage with very reactive, high-surface-area nanopowders exposed to air for relatively long and variable periods of time. As a result, such oxidation by-products are detected for kesterite samples as metal sulfates including copper sulfate pentahydrate CuSO 2 •5H 2 O, zinc sulfate monohydrate ZnSO 4 •H 2 O, and, possibly, hydrated tin oxide SnO 2 •xH 2 O not only in the mechanochemical synthesis method [ 4 , 5 , 9 ] but also in other preparation routes [ 10 , 11 , 12 ]. It is instructive to note that in some kesterite studies, the presence of oxygen-bearing species is evident from inspection of the data, although it is not specifically acknowledged or appropriately commented on by authors [ 13 ] (e.g., XPS survey scans with the apparent O 1s band in the range of 529–531 eV for oxides or the S2p 3/2 /S2p 1/2 bands in the range of 167–172 eV for the sulfate group [SO 4 ] −2 ).…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric/Thermal–Mass Spectroscopy Insight into Oxidation Propensity of Various Mechanochemically Made Kesterite Cu2ZnSnS4 Nanopowders

Lejda,

Partyka,

Janik

2024

Materials

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Thermogravimetry coupled with thermal analysis and quadrupole mass spectroscopy TGA/DTA-QMS were primarily used to assess the oxidation susceptibility of a pool of nanocrystalline powders of the semiconductor kesterite Cu2ZnSnS4 for prospective photovoltaic applications, which were prepared via the mechanochemically assisted synthesis route from two different precursor systems. Each system, as confirmed by XRD patterns, yielded first the cubic polytype of kesterite with defunct semiconductor properties, which, after thermal annealing at 500 °C under neutral gas atmosphere, was converted to the tetragonal semiconductor polytype. The TGA/DTA-QMS determinations up to 1000 °C were carried out under a neutral argon Ar atmosphere and under a dry, oxygen-containing gas mixture of O2:Ar = 1:4 (vol.). The mass spectroscopy data confirmed that under each of the gas atmospheres, a distinctly different, multistep evolution of such oxygen-bearing gaseous compounds as sulfur oxides SO2/SO3, carbon dioxide CO2, and water vapor H2O was taking place. The TGA/DTA changes in correlation with the nature of evolving gases helped in the elucidation of the plausible chemistry linked to kesterite oxidation, both in the stage of nanopowder synthesis/storage at ambient air conditions and during forced oxidation up to 1000 °C in the dry, oxygen-containing gas mixture.

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“…Thin films of CZTS are composed of abundant materials on earth with low toxicity (Copper (Cu), Zinc (Zn), Tin (Sn) and Sulfur (S)), and they have p-type conductivity, large band gap (in the range of 1.4-1.6 eV) with a high absorption coefficient (over 10 4 cm -1 ) that make it an excellent and promising material for solar cells [6]. CZTS thin films can be prepared by various physicochemical methods such as pulsed laser deposition [7], electrochemical deposition [8], chemical bath deposition [9], spray pyrolysis [10] and spin coating [11], etc. However, some of these methods suffer from expensive hardware requirements and significant power consumption.…”

Section: Introductionmentioning

confidence: 99%

Inexpensive Optimized Cu2ZnSnS4 Absorption Layer Elaborated with a Homemade SILAR Method

Benmazouza¹,

Sahraoui²,

Adnane³

et al. 2023

J. Nano- Electron. Phys.

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In this study, Cu2ZnSnS4 (CZTS) thin films were synthesized on glass substrates by using homemade successive ionic layer adsorption and reaction (SILAR) method. Copper (II) Chloride (CuCl2), Zinc (II) Chloride (ZnCl2), Tin (II) Chloride (SnCl2) were used as a cationic precursors and Thiourea (CS(NH2)2) was used as precursor for anions. De-ionized (DI) water was taken as the solvent for both precursors. Few drops of ammonia were added to both solutions in order to ensure the adsorption on the glass substrate. The deposited films were annealed at 200 °C for 1 h in air atmosphere and characterized by X-rays diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), ultraviolet-visible (UV-Vis) spectrophotometry and dielectric spectroscopy. The structural characterization using XRD revealed the formation of the kesterite phase with preferential orientation along (112) plane. Morphological observations from SEM and AFM exhibited uniform and homogenous CZTS thin layer. Optical properties derived from UV-Vis analysis showed that CZTS has a direct band gap of 1.5 eV in the visible range which is close to typical values of an ideal absorber layer. Dielectric impedance measurements showed that CZTS thin film presents an adsorption in the lower frequencies of RF domain which is due to the atomic vibrations in the crystal lattice. The obtained CZTS has the potential to serve as a reliable, economical, and environment-friendly alternative to unstable, expensive and toxic absorber layers for photovoltaic applications.

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Investigation of absorber and heterojunction in the pure sulphide kesterite

Cited by 7 publications

References 38 publications

Improvement of hetero-interface engineering by partial substitution of Zn in Cu₂ZnSnS₄-based solar cells

Improvement of hetero-interface engineering by partial substitution of Zn in Cu₂ZnSnS₄-based solar cells

Thermogravimetric/Thermal–Mass Spectroscopy Insight into Oxidation Propensity of Various Mechanochemically Made Kesterite Cu2ZnSnS4 Nanopowders

Inexpensive Optimized Cu2ZnSnS4 Absorption Layer Elaborated with a Homemade SILAR Method

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Investigation of absorber and heterojunction in the pure sulphide kesterite

Cited by 7 publications

References 38 publications

Improvement of hetero-interface engineering by partial substitution of Zn in Cu2ZnSnS4-based solar cells

Improvement of hetero-interface engineering by partial substitution of Zn in Cu2ZnSnS4-based solar cells

Thermogravimetric/Thermal–Mass Spectroscopy Insight into Oxidation Propensity of Various Mechanochemically Made Kesterite Cu2ZnSnS4 Nanopowders

Inexpensive Optimized Cu2ZnSnS4 Absorption Layer Elaborated with a Homemade SILAR Method

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Improvement of hetero-interface engineering by partial substitution of Zn in Cu₂ZnSnS₄-based solar cells

Improvement of hetero-interface engineering by partial substitution of Zn in Cu₂ZnSnS₄-based solar cells