Enhancement of charge collection at shorter wavelengths from alternative CdS deposition conditions for high efficiency CZTSSe solar cells

Tunuguntla V; Chen WC; Newman TD; Chen CY; Hsieh MC; Lu SH; Su CC; Chen LC; Chen KH

Solar Energy Materials and Solar Cells, Vol.149, 49-54, 2016

DOI10.1016/j.solmat.2016.01.004 Export Citation

Enhancement of charge collection at shorter wavelengths from alternative CdS deposition conditions for high efficiency CZTSSe solar cells

Tunuguntla V, Chen WC, Newman TD, Chen CY, Hsieh MC, Lu SH, Su CC, Chen LC, Chen KH

A cadmium sulfide (CdS) layer with a thickness of 37 +/- 5 nm is deposited onto a Cu2ZnSn(SSe)(4) absorber layer using Cd(NO3)(2) precursor at pH 11.8 via chemical bath deposition. Full devices fabricated with the thin CdS layer show improved champion efficiency of 6.97%, compared with the 5.91% efficiency of the control device, which can be attributed to the increased current density from reduced light reflection in the visible region and enhanced charge collection in the shorter wavelength region. Crown Copyright (C) 2016 Published by Elsevier B.V. All rights reserved.

Keywords:CZTSSe solar cells;CdS thickness;Cd(NO3)(2);Increase in current density;Increase in EQE