3D-Printed external light traps for solar cells

L. van Dijk, U.W. Paetzold, Gerhard Blab, E.A.P. Marcus, A.J. Oostra, J. van de Groep, A. Polman, R.E.I. Schropp, M. Di Vece

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

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We demonstrate a universally applicable 3D-printed external light trap for solar cells. We placed a macroscopic external light trap made of smoothened, silver coated plastic at the sun-facing surface of different types of solar cells. The trap consists of a reflective parabolic concentrator on top of a reflective cage. The trap directs the light that is reflected upwards by the solar cell back towards the solar cell. Due to this retro-reflection the light traverses the solar cell several times resulting in a broadband absorption enhancement. We present a 15-27% efficiency enhancement for crystalline silicon, thin film nanocrystalline silicon and organic solar cells.
Original languageEnglish
Title of host publicationPhotovoltaic Specialist Conference (PVSC), 2015 IEEE, 42nd
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Print)978-1-4799-7944-8
Publication statusPublished - 2015
Event42nd IEEE Photovoltaic Specialist Conference (PVSC 2015) - Hyatt Regency New Orleans , New Orleans, United States
Duration: 14 Jun 201519 Jun 2015
Conference number: 42


Conference42nd IEEE Photovoltaic Specialist Conference (PVSC 2015)
Abbreviated titlePVSC 2015
Country/TerritoryUnited States
CityNew Orleans
Internet address


  • Digital Printing
  • Light Trapping
  • Silicon
  • Solar energy
  • Photovoltaic cells


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