Presentation Details
| Pre- and Post-Deposition Copper Treatment for CdZnTe Back Buffer in CdTe Solar Cells Priya Suryavanshi1, Sam Machin2, Michael Walls2, James Sites1, . 1Colorado State University, Fort Collins, CO, USA.2Centre for Renewable Energy Systems Technology (CREST), Loughborough University, Loughborough, Leicestershire, United Kingdom.3Centre for Renewable Energy Systems Technology (CREST), Loughborough University, Loughborough, Leicestershire, United Kingdom.41Colorado State University, Fort Collins, CO, USA |
Abstract
Cadmium zinc telluride (CdZn�"Te₁₋x, x = 0.4), with a bandgap of ~1.7 eV, serves as an effective back buffer layer, improving rear contact properties in CdTe solar cells. The role of copper diffusion in enhancing charge carrier collection at the back interface was studied through pre- and post-CdZnTe treatments. Copper transport was controlled via sublimation and annealing. Device microstructure and interface quality were examined using TEM-HAADF, while EDS was used to probe copper distribution. Hyperspectral cathodoluminescence mapping assessed defect-related emissions and material uniformity.
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