CZTS Solar Cell performance enhancement using Al-doped ZnO nanorods
Ali Saoucha Salim
1
, Bouchama Idris
1,
Samah Boudour
1,2*
, Nowshad Amin
3
1
Department of Electronic, Faculty of Technology, University M. Boudiaf 28000Msila, Algeria.
heraga 16014, Algiers / Thin Films
and Applications Unit (UDCMA),Setif- Algeria.
3
Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor,
Malaysia.
*Corresponding author.
Tel:
+213(0)661242320;
E-mail
:
Recently ZnO nanorods (NR) coated on ITO has been successfully applied to
Cu
2
ZnSnS
4
(CZTS) solar cells, The ZnO NR arrays with high transmittance are used as a
highly efficient channel for rapid collection of the carriers to reduce the charge
recombination, as well as to increase the contact area of the heterojunction. In this work, two-
dimensional device simulator Atlas SILVACO-TCAD was employed to study the
performances of superstrate ITO/ZnO:Al(NR)/CdS/CZTS/Metal thin film solar cells. In the
first time, the influence of the defect density, the carrier concentration and the absorber
thickness on the cell performance were studied with a flat film structure (planar structure). In
the second time, the performance of the superstrate ITO/ZnO:Al(NR)/CdS/CZTS solar cell
was optimized in the function of the nanorods length, width and inter-rods spacing. The J-V
characteristics and the external quantum efficiency EQE are simulated and compared under
AM 1.5 illumination for both planar and nanowires solar cells. The achieved results can lead
to develop higher efficiency CZTS thin film solar cells.
Key words
-
superstrate solar cells, Cu
2
ZnSnS
4
, ZnO nanorods, Atlas SILVACO-TCAD.
PS1 27
-183-
