Please use this identifier to cite or link to this item:
|Title:||Influence of CdCl2 activation treatment on ultra-thin Cd1-xZnxS/CdTe solar cells|
|Authors:||CLAYTON Andrew; BAKER M.a.; BABAR S.; GIBSON Peter; IRVINE S. J. C.; KARTOPU G.; LAMB D. A.; BARRIOZ V.|
|Citation:||THIN SOLID FILMS vol. 590 p. 241-247|
|Publisher:||ELSEVIER SCIENCE SA|
|Type:||Articles in periodicals and books|
|Abstract:||Ultra-thin CdTe photovoltaic (PV) solar cells with an absorber thickness of 0.5 µm were produced by molecular organic chemical vapour deposition (MOCVD) onto indium tin oxide (ITO) coated boroaluminosilicate glass. A wide band gap Cd1-xZnxS alloy window layer was employed to improve spectral response in the blue region of the solar spectrum. X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were used to monitor changes in the chemical composition and crystal structure of the Cd1-xZnxS/CdTe solar cell after varying the post-deposition CdCl2 activation treatment time and annealing temperature. The CdCl2 treatment leached Zn from the Cd1-xZnxS layer causing a redshift in the spectral response onset of absorption. S diffusion occurred across the Cd1-xZnxS/CdTe interface, which was more pronounced as the CdCl2 treatment was increased. A CdTe1-ySy phase was formed at the interface, which thickened with CdCl2 treatment time. Small concentrations of S (up to 2 at.%) were observed throughout the CdTe layer as the degree of CdCl2 treatment was increased. Greater S diffusion across the Cd1-xZnxS/CdTe interface caused the device Voc to increase. The higher Voc is attributed to enhanced strain relaxation and associated reduction of defects in the interface region.|
|JRC Directorate:||Institute for Health and Consumer Protection Historical Collection|
Files in This Item:
There are no files associated with this item.
Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.