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https://elib.bsu.by/handle/123456789/206553| Title: | Фото-, электро- и катодолюминесценция пористого кремния |
| Other Titles: | Photo-, electro- and cathodoluminescence of porous silicon / L.S.Monastyrskii, I.B.OIenych, V.P.Savchyn |
| Authors: | Монастырский, Л. С. Оленич, И. Б. Савчин, В. П. |
| Keywords: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
| Issue Date: | 1999 |
| Publisher: | Минск : БГУ |
| Citation: | Взаимодействие излучений с твердым телом: Материалы III междунар. науч. конф., 6-8 окт. 1999 г., Минск: В 2 ч. Ч.2. — Мн.: БГУ, 1999. — С. 70-72. |
| Abstract: | Исследовано особенности фотолюминесценции, электролюминесценции в контакте с окисным электролитом, а также катодолюминесценции пористого кремния. Изучена временная эволюция электролюминесценции пористого кремния в режиме инжекции тока при импульсном возбуждении. Исследовано катодолюминесценцию пористого кремния при комнатной температуре и температуре жидкого азота. Полученные экспериментальные результаты свидетельствуют о наличии в пористом кремнии разнотипных центров излучения: с быстрой и медленной кинетикой. |
| Abstract (in another language): | Photoluminescence (PL) of porous silicon (PS) we have investigated at room temperature for nitrogen (0,37pm) and argon (0,48pm) laser exciting. The spectra were stable in time and had image wide band region near 600-900 nm Electroluminescence (EL) of this samples was investigated at room temperature in electrochemical cell with 0.5M H2SO4+0.1M K2S2Oa electrolyte in current injection regime. Under direct or pulsed current of various duration and polarity in the current stabilisation regime we have observed EL in the 500-900 nm interval of waves. We have registrated influence of type of pulsed excitation regime on EL intensity and degradation velocity. It was exist different types of kinetic of irradiation centres as shown by our experiments. We also have investigated cathodoluminescence (CL) from porous silicon at room temperature and temperature of liquid nitrogen. Two dominant CL bands with maximum in visible (at 550-570 nm) and ultraviolet (360-380 nm) regions were observed. The intensity of short wave band was in some times more, but decreasing velocity was strongly high comparatively with long wave one. CL blue band confirm existing of dielectric coating on quantum wires surface (eg=3.1eV). Long wave CL peak shift into short wave region comparatively with the same bands of PL and EL ( e 0«2.4 eV). This may be connected with different depth of exciting PL1EL1CL and absorption of radiation by porous silicon. Decreasing kinetics of this kinds of luminescence were different: PL was stable for investigation time (~1 h). Decreasing times for CL and EL were 15-20 min and 10-15 min. So the photo-, electro- and cathodoluminescence in porous silicon have strong the different nature. |
| URI: | http://elib.bsu.by/handle/123456789/206553 |
| ISBN: | 985-445-237-9 |
| Appears in Collections: | 1999. Взаимодействие излучений с твердым телом |
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