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The chemical potential of light in fluorescent solar collectors

The chemical potential of light in fluorescent solar collectors
The chemical potential of light in fluorescent solar collectors
The energetic aspect, discussed by the means of the chemical potential, involved into the absorption and radiation processes occurring in the operation of Fluorescent Solar Collectors is of interest in this publication. The chemical potential of the fluorescent light incident on the solar cell is characterised by studying the fluorescence spectrum emitted by a special type of fluorescent collector, where absorption and fluorescence take place in a liquid medium, in effect a liquid fluorescent collector. It is shown that photon re-absorption (known also as photon recycling) gradually brings the emitted photon flux into thermal equilibrium with the collector. The fluorescence photon distribution is then characterised by a specific temperature, obtained from the Kennard-Stepanov law, and a chemical potential given by the generalised Plank’s law. We find that the chemical potential of the fluorescent light incident on the solar cell is nearly equal to the thermodynamical limits imposed by a detailed balance argument. This equality indicates that non radiative losses do not affect the chemical potential of the light escaping from the collector, a major benefit in comparison to simple semiconductor based solar cells where non-radiative losses significantly affect the open circuit voltage.
chemical potential, photoluminescence, spectroscopy, thermodynamics, fluorescent solar collector, luminescent solar collector, detailed balance
0021-8979
063110-[8pp.]
Meyer, T.J.J.
ca776d76-8086-405b-99b0-9cd6d63c172b
Markvart, T.
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c
Meyer, T.J.J.
ca776d76-8086-405b-99b0-9cd6d63c172b
Markvart, T.
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c

Meyer, T.J.J. and Markvart, T. (2009) The chemical potential of light in fluorescent solar collectors. Journal of Applied Physics, 105 (6), 063110-[8pp.]. (doi:10.1063/1.3097328).

Record type: Article

Abstract

The energetic aspect, discussed by the means of the chemical potential, involved into the absorption and radiation processes occurring in the operation of Fluorescent Solar Collectors is of interest in this publication. The chemical potential of the fluorescent light incident on the solar cell is characterised by studying the fluorescence spectrum emitted by a special type of fluorescent collector, where absorption and fluorescence take place in a liquid medium, in effect a liquid fluorescent collector. It is shown that photon re-absorption (known also as photon recycling) gradually brings the emitted photon flux into thermal equilibrium with the collector. The fluorescence photon distribution is then characterised by a specific temperature, obtained from the Kennard-Stepanov law, and a chemical potential given by the generalised Plank’s law. We find that the chemical potential of the fluorescent light incident on the solar cell is nearly equal to the thermodynamical limits imposed by a detailed balance argument. This equality indicates that non radiative losses do not affect the chemical potential of the light escaping from the collector, a major benefit in comparison to simple semiconductor based solar cells where non-radiative losses significantly affect the open circuit voltage.

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Published date: 25 March 2009
Keywords: chemical potential, photoluminescence, spectroscopy, thermodynamics, fluorescent solar collector, luminescent solar collector, detailed balance
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 65899
URI: https://eprints.soton.ac.uk/id/eprint/65899
ISSN: 0021-8979
PURE UUID: 1149b43d-4a83-4cb0-a87b-08777dbad751

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Date deposited: 27 Mar 2009
Last modified: 19 Jul 2017 00:29

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