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Porous SiO2 can be used as a template to reduce substrate-induced stress, similar to porous GaN. Such a regrowth method may reduce the defect density in the epitaxial layer leading to high quality stress free layer on porous template. The samples were prepared on silicon (Si) wafers, (111)-oriented, with n- doping. After standard cleaning steps, SiO2 of 1200 Aring thickness was prepared by thermal...
To date, little work has been done on porous silicon-based MSM photodetectors. Porous silicon (PS) was obtained on n-type silicon (111) using photoelectrochemical etching in HF. Microstructural investigation has been done by scanning electron microscope (SEM) and X-ray diffraction (XRD) measurements. We have found that the PS consists of a regular silicon microarray with triangular geometry. From...
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