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Solar cell thermodynamics including multiple impact ionization and concentration of radiation

Landsberg, P.T. and Badescu, V. (2002) Solar cell thermodynamics including multiple impact ionization and concentration of radiation Journal of Physics D: Applied Physics, 35, (11), pp. 1236-1240. (doi:10.1088/0022-3727/35/11/321).

Record type: Article


The simultaneous effect of impact ionization and the concentration of radiation on solar cell performance is analysed. For maximum solar concentration and an infinite number of impact ionizations one obtains a maximum cell efficiency (0.845). This corresponds to an optimum reduced driving force qV/Eg = 0.882, given a ratio of Ts/Tp~300/6000 (q,V and Eg are electron electric charge, voltage and bandgap energy, respectively, while Ts and Tp are ambient and sun temperature, respectively). With full concentration the optimum reduced driving force equals the Carnot factor 1-Tc/Tp exactly (Tc is cell temperature). In the case of no illumination, there is a negative driving force. This is related to the coefficient of performance of a Carnot refrigeration engine. In the limit of an infinite number of impact ionizations, the Carnot factor occurs again, this time as an upper bound to the optimum reduced driving force.

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Published date: 2002


Local EPrints ID: 29499
ISSN: 0022-3727
PURE UUID: 2cbb1f3d-96a9-4816-a6c5-e9ef27f2e9ee

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Date deposited: 12 May 2006
Last modified: 17 Jul 2017 15:57

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Author: P.T. Landsberg
Author: V. Badescu

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