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Light management in ultra-thin solar cells: a guided optimisation approach.

Accepted version
Peer-reviewed

Repository DOI


Change log

Authors

Camarillo Abad, Eduardo  ORCID logo  https://orcid.org/0000-0001-8617-0059
Joyce, Hannah J 
Hirst, Louise C 

Abstract

The success of ever-thinner photovoltaics relies on the introduction of light management strategies to enhance the absorption of incident illumination. Tailoring these strategies to maximise the absorption of light requires optimising the complex interplay between multiple design parameters. We study this interplay with a transfer matrix method and rigorous coupled-wave analysis, within the context of waveguide modes in an ultra-thin (80 nm) GaAs solar cell. Based on this study, we develop a framework for light management optimisation which is guided by the underlying optical phenomena that determine the most favourable design parameters. In contrast to other optimisation approaches which exhaustively simulate multiple parameter combinations looking for the highest integrated absorption, our framework reduces the parameter space for optimisation, furthers our fundamental understanding of light management and is applicable to multiple length-scales and device architectures. We demonstrate the power of our framework by using it to compare the light trapping performance of photonic crystal gratings to that of engineered quasi-random structures, finding that photonic crystal gratings offer a superior performance in our device of interest.

Description

Keywords

4006 Communications Engineering, 40 Engineering, 4009 Electronics, Sensors and Digital Hardware, Generic health relevance

Journal Title

Opt Express

Conference Name

Journal ISSN

1094-4087
1094-4087

Volume Title

28

Publisher

Optica Publishing Group

Rights

Sponsorship
Engineering and Physical Sciences Research Council (EP/L015978/1)
European Commission Horizon 2020 (H2020) ERC (853365)
European Research Council (716471)
UK Space Agency (Unknown)
Engineering and Physical Sciences Research Council (EP/L015978/1); H2020 European Research Council (853365); UK Space Agency (PF2-012); European Research Council (716471); Consejo Nacional de Ciencia y Tecnología; Cambridge Trust.