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Role of surface substances in excitation of porous silicon photoluminescence

Khomenkova L. Y., Baran N. P., Dzhumaev B. R., Korsunskaya N. E., Torchinskaya T. V., Goldstein Y., Savir E., Many A.

Opto-Electronics Review

1999

Vol. 7, No. 2

135-138

Photoluminescence (PL) and photoluminescence excitation (PLE) spectra studies as well as SIMS and FTIR methods were used for investigation of PL excitation mechanism of porous silicon (PS). It is shown that there are two types of PS PLE spectra, which consist of either two bands (visible and ultraviolet) or only ultraviolet one. The different dependencies of intensity of each PLE band upon anodization regimes as well as during aging and thermal treatment were observed. Two excitation channels have been shown to be present in PS. The visible PLE band at 300 K has been attributed to light absorption of some species on Si wire surface.

Current status of space and terrestrial solar energetics

Torchinskaya T. V.

Opto-Electronics Review

1998

Vol. 6, No. 2

121-130

The paper presents review of current condition of space and terrestrial solar energetics. The comparison of the most popular Si and GaAs solar cells, as well as their parameters variation with temperature rise, radiation treatments, and improving design were analysed. The modern international space projects, applying new types of solar cells, were discussed as well.