Thermoelectrical Field Effects in Low Dimensional Structure Solar Cells

Details Thermoelectrical Field Effects in Low Dimensional Structure Solar Cells Thermoelectrical Field Effects in Low Dimensional Structure Solar Cells

2002-12-23

arxiv.org/abs/cond-mat/0212556v1

Physica E 14, 101 (2002)

Physics

Condensed Matter

Materials Science

Published in Special issue Physica E 14 (1-2) on Nanostructures in Photovoltaics

Scientific paper

Taking into account the temperature gradients in solar cells, it is shown that their efficiency can be increased beyond the Shockley-Queisser limit (J. Appl. Phys. 32 (1961) 510). The driving force for this gain is the temperature gradient between this region and its surroundings. A quantitative theory is given. Though the effect is found to be weak in conventional solar cells, it is argued that it can be substantially increased by proper choice of materials and design of the device. In particular, it is shown that the insertion of a quantum well can enhance the efficiency beyond one of the single gap cell, due to the presence of temperature jumps at the heterojunctions.

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