Photovoltaic cells for solar powered TPV systems

In present paper, different aspects of a solar powered TPV system are under theoretical and experimental study, such as heating the emitter of photons by focusing sunlight, returning the sub-bandgap photons by reflecting IR radiation from cell back surface, and estimating the cell conversion efficie...

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Bibliographic Details
Main Authors: Khvostikov, V.P., Rumyantsev, V.D., Khvostikova, O.A., Gazaryan, P.Y., Sorokina, S.V., Shvarts, M.Z., Vlasov, S., Andreev, V.M.
Format: Conference Proceeding
Language:English
Subjects:
Estimation theory
Geometry
Heating
Optical reflection
Photoconductivity
Photonic band gap
Photovoltaic cells
Solar energy
Temperature
Tungsten
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Summary:In present paper, different aspects of a solar powered TPV system are under theoretical and experimental study, such as heating the emitter of photons by focusing sunlight, returning the sub-bandgap photons by reflecting IR radiation from cell back surface, and estimating the cell conversion efficiency being guided by semiempirical approaches. Efficiency of 25% can be obtained in GaSb cells without photon recirculation illuminated by tungsten emitter heated up to 2200-2500 K. Efficiency exceeding 30% can be achieved in GaSb PV cells assuming 90% reflection of sub-bandgap photons back to the emitter. GaSb based TPV photoreceivers of cylindrical and flat geometry were developed and investigated outdoors. Photocurrent density as high as 4.5 A/cm/sup 2/ and PV cell efficiency of 14% have been obtained in the modules.
ISSN:0160-8371
DOI:10.1109/PVSC.2005.1488216