Photon frequency management for trapping & concentration of sunlight

Markvart, Tomas and Danos, Lefteris and Fang, Liping and Parel, Thomas and Soleimani, Nazila (2012) Photon frequency management for trapping & concentration of sunlight. RSC Advances, 2 (8). pp. 3173-3179.

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Abstract

This paper considers a range of techniques which – within the realm of classical optics – can be used to enhance light capture as a first step in photovoltaic energy conversion. Examples include a simple case of downshifting, fluorescent collectors which reduce the size of a light beam, and a novel form of light trapping to increase the path length of light within the solar cell. The results are discussed using a thermodynamic framework where the energy exchange with an absorbing/fluorescent medium allows the entropy of the captured photon gas to be lowered, reducing the étendue of the emitted beam. We show that frequency management represents a powerful tool, allowing enhancement in light trapping above the Yablononovitch limit, leading to potentially highly efficient but very thin crystalline silicon solar cells.

Item Type:
Journal Article
Journal or Publication Title:
RSC Advances
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600
Subjects:
ID Code:
62799
Deposited By:
Deposited On:
15 Mar 2013 09:11
Refereed?:
Yes
Published?:
Published
Last Modified:
13 May 2020 02:04