Fabrication of CZTS thin films by dip coating technique for solar cell applications

P Prabeesh, P Saritha, IP Selvam, SN Potty - Materials Research Bulletin, 2017 - Elsevier
P Prabeesh, P Saritha, IP Selvam, SN Potty
Materials Research Bulletin, 2017Elsevier
Abstract Phase pure Cu 2 ZnSnS 4 thin films were fabricated by simple dip coating
technique. Precursor films were coated onto glass substrates using stable solutions of
copper, zinc and tin dissolved in 2 methoxyethanol and monoethanolamine. These
precursor films were sulphurized in N 2+ H 2 S atmosphere at different temperatures ranging
from 400° C to 600° C. XRD analysis and Raman studies revealed a single CZTS phase for
the films sulphurised at 500° C and 550° C, but good crystallinity was observed for the film …
Abstract
Phase pure Cu2ZnSnS4 thin films were fabricated by simple dip coating technique. Precursor films were coated onto glass substrates using stable solutions of copper, zinc and tin dissolved in 2 methoxyethanol and monoethanolamine. These precursor films were sulphurized in N2 + H2S atmosphere at different temperatures ranging from 400 °C to 600 °C. XRD analysis and Raman studies revealed a single CZTS phase for the films sulphurised at 500 °C and 550 °C, but good crystallinity was observed for the film sulphurized at 550 °C. Rietveld method was used for structural refinement. SEM and FESEM studies indicate good surface morphology and large grains in the film sulphurized at 550 °C. The film exhibited an optical absorption coefficient of >104cm−1 and an optical band gap of 1.4 eV. The carrier concentration, resistivity and mobility are 1.434 × 1018 cm−3, 5.3 cm2/Vs and 0.828 Ωcm, respectively and the conduction is p-type. The photovoltaic properties are suitable for thin film solar cell fabrication.
Elsevier
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