Physics
Scientific paper
Jul 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.274..144r&link_type=abstract
Nature, vol. 274, July 13, 1978, p. 144, 145.
Physics
4
Concentrators, Glass, Photovoltaic Conversion, Solar Cells, Solar Collectors, Solar Energy Absorbers, Absorption Spectra, Emission Spectra, Energy Dissipation, Silicon, Spectral Sensitivity
Scientific paper
The paper describes the use of a fluorescent plane uranyl-doped glass to convert and concentrate the UV and blue part of the solar spectrum. The device is able to dissipate the heat energy coming directly from the sun over the large area of the glass so that only the energy in the visible part of the spectrum will reach the solar cell. The excess between the absorbed energy and the band-gap energy which is evolved as heat in the solar cell can be diminished by decreasing the difference in wavelength between the useful and excess energy. When a rectangular slab of uranyl-doped glass is coupled to a silicon cell and excited by a high-pressure mercury source, a considerable increase of current and voltage is obtained. The luminescence of uranyl does not fall in the spectral range of maximum sensitivity of silicon cells; energy transfer from the uranyl ion to an ion emitting closer to the maximum spectral sensitivity of silicon is recommended.
Neuman S.
Reisfeld R.
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