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), 1236-1240. (doi:10.1088/0022-3727/35/11/321).

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Description/Abstract

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.

Item Type: Article
ISSNs: 0022-3727 (print)
Related URLs:
Subjects: T Technology > T Technology (General)
Q Science > QD Chemistry
Q Science > QA Mathematics
Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Mathematics > Applied Mathematics
ePrint ID: 29499
Date Deposited: 12 May 2006
Last Modified: 27 Mar 2014 18:17
URI: http://eprints.soton.ac.uk/id/eprint/29499

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