Formation of Cu2ZnSnS4 thin films and optimization of the optical bandgap using the Taguchi approach

Taghavi, M.; Behboudnia, M.; Miraghaei, S.

doi:10.1016/j.matchemphys.2022.126394

Cited by 4 publications

(1 citation statement)

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“…The simplest method used to produce CZTS films is Flash Evaporation, followed by sulfurization. Using this technique, Taghavi et al [7] have explored control of stoichiometry by controlling the powder blends. Authors used an iterative Taguchi approach in fabrication of CZTS films to tune the powder blend to obtain optimum bandgap in the CZTS films.…”

Section: Introductionmentioning

confidence: 99%

Study of optical and structural properties of CZTS thin films using copper capping layer and sulfurization to correct stoichiometry

Bhale,

Bute,

Tokas

et al. 2024

Phys. Scr.

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Non-toxic, environment friendly and low cost Cu2ZnSnS4 (CZTS) thin films were deposited on sodalime glass substrates by radio frequency magnetron sputter deposition technique. Stoichiometry analysis revealed that the as-deposited films were Cu deficient. Hence, Cu capping layer was deposited, to study its’ effect on optical and structural properties of the films. These films were subsequently sulfurized in a quartz setup. Ultimately, stoichiometric CZTS films with improved Cu content up to 27.4% were obtained. The kesterite CZTS phase was identified in the samples using X-ray diffraction measurements. The morphological studies revealed that, grain size varies as a function of the thickness of Cu capping layer. The formation of undesired Cu2S and ZnS phases were also observed in the film with Cu content above and below the optimum range. Optical bandgap (Eg) of the films could also be optimized by controlling the Cu content in the film. An optimal Cu content between 24% and 26% was found to be appropriate for achieving a desired bandgap within a range of 1.55 to 1.4 eV, suitable for application in thin film solar cells. The CZTS films with corrected stoichiometry have a charge carrier density in the rage of ~〖10〗21 〖cm〗-3, which are much better than values reported so far in the literature.

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Section: Introductionmentioning

confidence: 99%