Synthesis and study of properties of CZTS thin films grown using a novel solution-based chemical route

Suarez, Hugo; Correa, J. M.; Cruz, Sergio de la; Otálora, C. A.; Hurtado, María del Pilar; Gordillo, G.

doi:10.1109/pvsc.2013.6745002

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…In fact, SnS, which formed during TT1 in TT1-A1 and TT1-B1 samples, has a low energy gap (1.14 eV) and could contain a large density of defects giving absorption in the IR range. It is also observed that the transmittance curve of the CZTS film shows a sloping trend, which could be caused by absorption of photons in deep centers generated by structural defects [27,28].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Post-Annealing of Cu2ZnSnS4 Absorber Layers Based on Oleylamine/1-dodecanethiol

et al. 2019

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Cu2ZnSnS4 (CZTS) nanocrystals in oleylamine (OLA) and 1-dodecanethiol (1-DDT) solvents were successfully prepared via hot-injection method, to produce inks for the deposition of absorber layers in photovoltaic cells. In this process, 1-DDT acts as a coordinating ligand to control the nucleation and growth of CZTS nanocrystals, whereas lower amounts of OLA promote a homogeneous growth of the grains in the absorber layer. X-Ray Diffraction (XRD) revealed both tetragonal and hexagonal phases of CTZS in films obtained after soft thermal treatments (labeled TT0). In particular, 1-DDT is responsible for the formation of a greater percentage of the hexagonal phase (ZnS-wurtzite type) than that formed when only OLA is used. The thermal treatments have been varied from 500 °C to 600 °C for improving crystallization and eliminating secondary phases. Both features are known to promote CZTS thin films with band gap values typical of CZTS (1.5–1.6 eV) and suitable resistivity. This study let to compare also the CZTS post-annealing without (TT1) and with sulfur vapor (TT2) in a tubular furnace. Only tetragonal CZTS phase is observed in the XRD pattern of CZTS thin films after TT2. A small presence of localized residues of secondary phases on the same samples was revealed by μRaman measurements. The best values of band gap (1.50 eV) and resistivity (1.05 ohm.cm) were obtained after thermal treatment at 500 °C, which is suitable for absorber layer in photovoltaic application.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Post-Annealing of Cu2ZnSnS4 Absorber Layers Based on Oleylamine/1-dodecanethiol

et al. 2019

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“…In another study on the deposition of CZTS using spin coating technique, percentage transmittance less than 50% was reported [48]. A lower transmittance value shown by the samples deposited at pH 1.8 and 2 is preferred for solar cell absorber materials [7,48,49]. A lower transmittance value observed for the samples deposited at pH 1.8 and 2 could be due to the presence of native defects and presence of secondary phases which serve as absorption centers [49].…”

Section: Uv Vis Spectroscopymentioning

confidence: 99%

“…A lower transmittance value shown by the samples deposited at pH 1.8 and 2 is preferred for solar cell absorber materials [7,48,49]. A lower transmittance value observed for the samples deposited at pH 1.8 and 2 could be due to the presence of native defects and presence of secondary phases which serve as absorption centers [49]. The optical absorbance of the deposits at various wave- lengths was analyzed and the data were used to generate the absorption coefficient values, which were used to plot the Tauc plot shown by the Tauc relation (Eq.…”

Section: Uv Vis Spectroscopymentioning

confidence: 99%

One Step Electrodeposition of Copper Zinc Tin Sulfide Using Sodium Thiocyanate as Complexing Agent

Sani¹,

Manivannan²,

Victoria³

2018

J. Electrochem. Sci. Technol

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Single step electrodeposition of Cu 2 ZnSnS 4 (CZTS) for solar cell applications was studied using an aqueous thiocyanate based electrolyte. The sodium thiocyanate complexing agent was found to decrease the difference in the deposition potential of the elements. X-ray diffraction analysis of the samples indicates the formation of kesterite phase CZTS. UV-vis studies reveal the band gap of the deposits to be in the range of 1.2-1.5 eV. The thickness of the deposit was found to decrease with increase in pH of the electrolyte. Nearly stoichiometric composition was obtained for CZTS films coated at pH 2 and 2.5. I-V characterization of the film with indium tin oxide (ITO) substrate in the presence and the absence of light source indicate that the resistance decrease significantly in the presence of light indicating suitability of the deposits for solar cell applications. Results of electrochemical impedance spectroscopic studies reveal that the cathodic process for sulfur reduction is the slowest among all the elements.

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“…ZnS is known to exhibit strong peaks at 352 and 271 cm −1 and such peaks were found in the results obtained [12]. Crystalline SnS 2 phase was Advances in Materials Physics and Chemistry matched to the peak found at 225 cm −1 [13]. Figure 3 shows the Raman spectra for CZTS deposited in the 0.2 M citrate bath.…”

Section: Raman Spectrometrymentioning

confidence: 54%

Effect of Trisodium Citrate on the Properties of Electrodeposited Cu2ZnSnS4 (CZTS) Layers on ZnS Thin Films Using a 2-Electrode Method

Hernandez¹,

Weerasinghe²

2018

AMPC

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Electrodeposition of CZTS thin films on ZnS was carried using a 2-electrode method to fabricate superstrate structure solar cells. A comprehensive study was performed on the effects of trisodium citrate on the CZTS electrolyte bath. In the present investigation, it is demonstrated that using a CZTS electrolyte with a concentration of 0.2 M trisodium citrate yields CZTS thin films with an electronic bandgap of 1.52 eV, a p-type nature, and good uniformity, which are all results desired for the fabrication of thin film solar cells. Characterization was performed using UV-Vi-IR optical absorption, SEM imaging, Raman spectrometry, and photoelectrochemical cells conducted for electronic bandgap, morphology, chemical composition, and semiconductor conductivity, respectively.

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Synthesis and study of properties of CZTS thin films grown using a novel solution-based chemical route

Cited by 8 publications

References 10 publications

Synthesis and Post-Annealing of Cu2ZnSnS4 Absorber Layers Based on Oleylamine/1-dodecanethiol

Synthesis and Post-Annealing of Cu2ZnSnS4 Absorber Layers Based on Oleylamine/1-dodecanethiol

One Step Electrodeposition of Copper Zinc Tin Sulfide Using Sodium Thiocyanate as Complexing Agent

Effect of Trisodium Citrate on the Properties of Electrodeposited Cu2ZnSnS4 (CZTS) Layers on ZnS Thin Films Using a 2-Electrode Method

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