Tampere University of Technology

TUTCRIS Research Portal

Metal/Polymer Back Reflectors with Diffraction Gratings for Light Trapping in III-V Solar Cells

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC)
Subtitle of host publicationA Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC
PublisherIEEE
Pages2847-2851
Number of pages5
ISBN (Electronic)978-1-5386-8529-7
DOIs
Publication statusPublished - Nov 2018
Publication typeA4 Article in a conference publication
EventWorld Conference on Photovoltaic Energy Conversion -
Duration: 5 Dec 1994 → …

Publication series

NameCONFERENCE RECORD OF THE IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE
PublisherIEEE
ISSN (Print)0160-8371

Conference

ConferenceWorld Conference on Photovoltaic Energy Conversion
Period5/12/94 → …

Abstract

We report on the fabrication, characterization and simulation of diffraction gratings for back contact reflectors in III-V solar cells. The gratings are designed for thin-film solar cells incorporating absorbers with bandgap slightly lower than GaAs, such as InAs/GaAs quantum dot or GaInNAs solar cells. Metal/polymer back reflectors with a blazed grating or a pyramid grating were fabricated by nanoimprint lithography. The gratings are compared in terms of diffraction ability, which is the feature responsible for increasing the absorption. The pyramid grating showed higher diffraction of light compared to the blazed grating. The diffraction efficiency measurements were in agreement with the numerical simulations. The model validation enables tailoring the properties of the reflectors for other type of solar cells by adjusting the optimal dimensions of the gratings for different wavelengths.

Publication forum classification