OJO, A.A., OLUSOLA, I.O. and DHARMADASA, I (2017). Effect of the inclusion of Galium in normal Cadmium chloride treatment on electrical properties of CdS/CdTe solar cell. Materials Chemistry and Physics, 196, 229-236.
|
PDF
Dharmadasa - Effect of the inclusion of galium in normal (AM) 15729.pdf - Accepted Version Creative Commons Attribution Non-commercial No Derivatives. Download (808kB) | Preview |
Abstract
The inclusion of gallium into the well-known CdCl2 post-growth treatment shows drastic improvement in both CdTe material and electrical properties of the fully fabricated CdS/CdTe-based solar cell as compared with the regular CdCl2 treatment. The optical, morphological, compositional and electronic properties the glass/FTO/n-CdS/n-CdTe/p-CdTe were explored after post-growth treatment of glass/FTO/n-CdS/n-CdTe/p-CdTe with CdCl2 and CdCl2:Ga treatments at 430 °C for 20 min. Morphological analysis show grain growths within the ranges of (100 – 2000) nm and (200 – 2600) nm for CdCl2 and CdCl2:Ga treatments as compared with the as-deposited glass/FTO/n-CdS/n-CdTe/p-CdTe layer with grain size within the ranges of (100 – 250) nm. Structurally, the preferred orientation of the as-deposited CdTe remains (111)C after both CdCl2 and CdCl2:Ga treatments of glass/FTO/n-CdS/n-CdTe/p-CdTe with randomisation of crystallite orientation observed after CdCl2:Ga with an increase in the diffraction intensities of the (220)C and (311)C CdTe peaks. The multilayer structure glass/FTO/n-CdS/n-CdTe/p-CdTe utilised in this work was grown using electrodeposition technique. The glass/FTO/n-CdS/n-CdTe/p-CdTe sample was divided into three sets; the first and second sets were treated with CdCl2 and CdCl2:Ga respectively, while the third set was left as-deposited. Both the CdCl2 and CdCl2:Ga sets were heat treated in air at 430°C for 20 min, etched to improve metal/semiconductor interface and metallised with 100 nm Au contacts. The current-voltage measurements show comparative improvements in the open-circuit voltage, short-circuit current density, fill factor and the solar cell efficiency of the CdCl2:Ga treated glass/FTO/n-CdS/n-CdTe/p-CdTe as compared with the CdCl2 treated structure. A conversion efficiency of ~11% was achieved with the CdCl2:Ga treatment while ~7% was achieved with the CdCl2 treatment of similar glass/FTO/n-CdS/n-CdTe/p-CdTe device structure. This observation shows that the inclusion of gallium further improves CdCl2 treatment of CdS/CdTe-based solar cell due to its unique features of improving the stoichiometry of the CdTe layer.
Item Type: | Article |
---|---|
Research Institute, Centre or Group - Does NOT include content added after October 2018: | Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group |
Identification Number: | https://doi.org/10.1016/j.matchemphys.2017.04.053 |
Page Range: | 229-236 |
Depositing User: | Jill Hazard |
Date Deposited: | 12 May 2017 13:39 |
Last Modified: | 18 Mar 2021 04:20 |
URI: | https://shura.shu.ac.uk/id/eprint/15729 |
Actions (login required)
View Item |
Downloads
Downloads per month over past year