Photo-Induced Degradation and Structural Change in Hydrogenated Amorphous Silicon.
نویسندگان
چکیده
منابع مشابه
Light-induced structural changes in hydrogenated amorphous silicon
A direct ab initio calculation of network dynamics and diffusion both for the ground state and light excited state for a-Si:H was performed. In the light excited state there was observed enhanced hydrogen diffused and formation of new silicon dihydride configurations: (H-Si Si-H)2(H-Si Si-H) and SiH2. For the first time, we show the detailed dynamic pathways that arise from light induced occupa...
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From different sources of carbon , propane have been chosen to get a wider band gap amorphous silicon alloy . After analyzing the conductivity and optical gap variation with the doping ratio , the best were used to fabricate 5x5 cm solar cells . Those cells are connected to form 75 x 75 cm panels. Photo-oxidation were carried out using different sources as an accelerated method to study the met...
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The inherently disordered nature of hydrogenated amorphous silicon (a-Si:H) obscures the influence of atomic features on the trapping of holes. To address this, we have created a set of over two thousand ab initio structures of a-Si:H and explored the influence of geometric factors on the occurrence of deep hole traps using density-functional theory. Statistical analysis of the relative contrib...
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The metastable defects of a-Si:H samples annealed at temperatures in the 300-550°C range have been studied by photothermal deflection spectroscopy (PDS). The light-soaked samples show an increase in optical absorption in the 0.8 to 1.5 eV range. The metastable defect density decreases when the annealing temperature increases, while the defect density increases. This decrease in the metastable d...
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ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 2001
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.50.368