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Multi-resonant light trapping: New paradigm, new limits

  • Stephane Collin
  • , Julie Goffard
  • , Andrea Cattoni
  • , Clement Colin
  • , Christophe Sauvan
  • , Philippe Lalanne
  • , Jean Francois Guillemoles
  • Centre national de la recherche scientifique
  • Univ. Bordeaux
  • Tokyo University

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

Abstract

We propose a novel approach for light trapping in solar cells. It is based on absorption through multiple resonant modes in the critical coupling regime (A=100%). A simple model is developed for the calculation of the upper limit of optical absorption in a slab of semiconductor. This multi-resonant critical coupling limit exceeds the conventional lambertian limit (4n2) for any absorber thickness. We also provide a numerical example of multi-resonant absorption in a 45nm-thick CIGS layer. It demonstrates that absorption can overcome the conventional limit on a broad spectral range.

Original languageEnglish
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479979448
DOIs
Publication statusPublished - 14 Dec 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: 14 Jun 201519 Jun 2015

Publication series

Name2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

Conference

Conference42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
Country/TerritoryUnited States
CityNew Orleans
Period14/06/1519/06/15

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