Study of CdTe/CdS heterostructure by CdCl2 heat treatment via in situ high temperature XRD
| Autor: | Jung-Gyu Lee, Man-Geun Kim, Sang Ho Sohn, Soo-Hyoung Lee |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
X-ray photoelectron spectroscopy Renewable Energy Sustainability and the Environment Annealing (metallurgy) Analytical chemistry Recrystallization (metallurgy) Heterojunction Atomic ratio Tin oxide Cadmium telluride photovoltaics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Eutectic system |
| Zdroj: | Solar Energy Materials and Solar Cells. 109:209-214 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2012.11.012 |
| Popis: | A CdTe/CdS heterostructure was fabricated on Fluorine Tin Oxide glass to produce thin-film photovoltaic devices. A CdCl 2 layer was deposited onto the CdTe absorber layer and the subsequent annealing of the stack was performed in a He atmosphere. The influence of the CdCl 2 -activation step on the interfaces was investigated by monitoring the phase transition of CdCl 2 -heat-treated CdTe specimens during temperature ramp annealing via in situ high-temperature X-ray diffraction. X-ray Photoelectron Spectroscopy depth profiling data confirmed the interdiffusion between the CdTe and CdS layers through observation of the binding energy shifts and atomic ratio. The experimental results reveal that a compressive force, which is due to the formation of CdTeCdCl 2 eutectic liquid phases between grains, which cause the capillary action of such liquid phases, seems to introduce a compressive strain in the plane of the film that facilitates the recrystallization process. |
| Databáze: | OpenAIRE |
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