Periodic dielectric structures for light-trapping in InGaAs/GaAs quantum well solar cells

Turner, Sam, Mokkapati, Sudha ORCID: https://orcid.org/0000-0003-3260-6560, Jolley, Greg, Fu, Lan, Tan, Hark Hoe and Jagadish, Chennupati 2013. Periodic dielectric structures for light-trapping in InGaAs/GaAs quantum well solar cells. Optics Express 21 (S3) , A324-A335. 10.1364/OE.21.00A324

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Abstract

We study dielectric diffraction gratings for light-trapping in quantum well solar cells and compare their performance with plasmonic and Lambertian light-trapping structures. The optimum structural parameters are identified for symmetric uni-periodic, symmetric bi-periodic and asymmetric bi-periodic gratings. The enhancement in short-circuit current density from the quantum well region with respect to a reference cell with no diffraction grating is calculated. The ratio of this enhancement to the maximum achievable enhancement (i.e. no transmission losses) is 33%, 75% and 74%, respectively for these structures. The optimum asymmetric and symmetric bi-periodic structures perform closest to Lambertian light-trapping, while all three optimum grating structures outperform optimum plasmonic light-trapping. We show that the short-circuit current density from the quantum well region is further enhanced by incorporating a rear reflector.

Item Type:	Article
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Optical Society of America
ISSN:	1094-4087
Last Modified:	02 Nov 2022 11:53
URI:	https://orca.cardiff.ac.uk/id/eprint/103457

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