Porous silicon posseses a wide range of the unique properties and has good perspectives for photo-sensitive structures for a solar cells new generation. Due to the developed pore system, the area of absorbing surface increases, and also the increased sensitivity expands into the short-wavelength region due to the increased energy band gap of silicon nano-particles and silicon nano-filaments on the walls of the pores. Carbonization of the surface layer of porous silicon makes absorption even more effective. In this case, the spectrum of the solar cell expands into the shortwavelength region due to absorption of the high-energy photons in the wide gap material (SiC). In this study, layers of nanocrystalline porous silicon and porous silicon carbide are used as wide-gap material layers in photosensitive structures. The spectral characteristics of the specular reflectance of these materials are investigated.
Исследованы спектральные характеристики коэффициента зеркального отражения, фоточувствительности и фотолюминесценции многослойных структур на основе пористого кремния с ионами редкоземельных элементов. Показано, что фоточувствительность таких структур в диапазоне длин волн 0.4−1.0 мкм повышена по сравнению со структурами без редкоземельных элементов. Структуры с ионами Er 3+ проявляют люминесцентные свойства при комнатной температуре в спектральном диапазоне от 1.1 до 1.7 мкм. Спектр фотолюминесценции эрбиевой примеси представлен тонкой структурой линий, отражающих структуру расщепления мультиплета 4 I 15/2 иона Er 3+ . Показано, что структуры с пористым слоем на рабочей поверхности имеют значительно более низкий коэффициент отражения во всем измеряемом спектральном диапазоне 0.2−1.0 мкм.
In this work, the influence of technological parameters on the current-voltage characteristics of solar cells with nanostructured silicon was studied. It is shown, that for structures with a developed surface, the selection of optimal diffusion regimes is required.
Porous silicon is one of the promising objects for the development of nanostructured delivery systems. The purpose of this work is to review the literature, including the issues of studying the creation of dosage forms based on porous silicon.
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