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Solar cell as a waveguide: quantum efficiency of ultrathin crystalline silicon solar cell

Solar cell as a waveguide: quantum efficiency of ultrathin crystalline silicon solar cell
Solar cell as a waveguide: quantum efficiency of ultrathin crystalline silicon solar cell
An analysis of an ultra-thin crystalline silicon solar cell with 200 nm thick active layer fabricated in our laboratory shows that the behavior of quantum efficiency as a function of wavelength is primarily determined by the absorption of light in the active layer, showing a series of interference peaks. We have now modeled this solar cell in detail, perceiving the solar cell as a waveguide. Intriguingly we find that the peaks in the quantum efficiency lie close to the frequencies of the trapped (internal) modes of the waveguide. This paper provides a detailed explanation of how these modes, normally inaccessible to external observation, can be detected in external quantum response, in terms of the position of poles of the absorbance in the complex wave number plane
absorption, quantum efficiency, optical properties
31-33
Fang, L.
02af2887-a677-4931-8506-f3210a28ecaa
Danos, L.
c831e137-37b9-42cc-ab8c-49de31038922
Markvart, T.
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c
Fang, L.
02af2887-a677-4931-8506-f3210a28ecaa
Danos, L.
c831e137-37b9-42cc-ab8c-49de31038922
Markvart, T.
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c

Fang, L., Danos, L. and Markvart, T. (2013) Solar cell as a waveguide: quantum efficiency of ultrathin crystalline silicon solar cell. 28th European Photovoltaic Solar Energy Conference and Exhibition, Paris, France. pp. 31-33 . (doi:10.4229/28thEUPVSEC2013-1BO.10.4).

Record type: Conference or Workshop Item (Paper)

Abstract

An analysis of an ultra-thin crystalline silicon solar cell with 200 nm thick active layer fabricated in our laboratory shows that the behavior of quantum efficiency as a function of wavelength is primarily determined by the absorption of light in the active layer, showing a series of interference peaks. We have now modeled this solar cell in detail, perceiving the solar cell as a waveguide. Intriguingly we find that the peaks in the quantum efficiency lie close to the frequencies of the trapped (internal) modes of the waveguide. This paper provides a detailed explanation of how these modes, normally inaccessible to external observation, can be detected in external quantum response, in terms of the position of poles of the absorbance in the complex wave number plane

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More information

Published date: 30 September 2013
Venue - Dates: 28th European Photovoltaic Solar Energy Conference and Exhibition, Paris, France, 2013-09-30
Keywords: absorption, quantum efficiency, optical properties
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 361034
URI: http://eprints.soton.ac.uk/id/eprint/361034
PURE UUID: ef707333-3205-40f4-a98d-2d5d67cf0bc5

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Date deposited: 10 Jan 2014 15:36
Last modified: 14 Mar 2024 15:45

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Contributors

Author: L. Fang
Author: L. Danos
Author: T. Markvart

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