Modulated surface texturing of temporary Al foils substrates for high-efficiency thin-film, flexible solar cells

Gianluca Limodio, Davide Bartesaghi, Maurice Hietkamp, Devika Rajagopal, Sajith Nawaratne, Edward Hamers, Arno Smets

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

In this work we focus on texturing Al substrate in order to employ the modulated surface texturing approach for thin-film, flexible, micromorph solar cells. We deployed two different methods to induce micro-craters in Al foil, i) bare Al etching by KOH and ii) AZO sacrificial layer etched in KOH. After modelling the etching kinetics of KOH on Al, we characterized the 2D correlation length and rms roughness of these samples and find the optimal aspect ratio of 12% to deposit high-quality 3 µm-thick nc-Si. Finally, excellent angular scattering properties have been measured for both employed methods.

Original languageEnglish
Title of host publication2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages453-456
Number of pages4
ISBN (Electronic)9781728161150
DOIs
Publication statusPublished - 2020
Event47th IEEE Photovoltaic Specialists Conference, PVSC 2020 - Calgary, Canada
Duration: 15 Jun 202021 Aug 2020

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
Volume2020-June
ISSN (Print)0160-8371

Conference

Conference47th IEEE Photovoltaic Specialists Conference, PVSC 2020
Country/TerritoryCanada
CityCalgary
Period15/06/2021/08/20

Keywords

  • Al substrate
  • etching
  • flexible
  • thin-film solar cells

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