Freeform surface relief diffractive optic for photovoltaic spectrum splitting

Shelby D. Vorndran, Silvana Ayala, Yuechen Wu, Juan M. Russo, Melissa A. Zaverton, Tom Milster, Raymond K. Kostuk

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

2 Scopus citations

Abstract

A surface relief diffractive optical element (DOE) for photovoltaic (PV) spectrum splitting is fabricated and tested. The optic is designed using a modified Gerchberg-Saxton algorithm. The module consists of a DOE followed by a 3.3 cm focal length lens. Alternating side-by-side PV cells - Indium Gallium Phosphide and Silicon - are placed at the collection plane. The DOE is fabricated in photopolymer using grayscale lithography. Optical efficiency and spectral distribution are measured with a scanning spectrometer. Two-bandgap conversion efficiency of 25.4% is achieved using the fabricated DOE. Simulations show that 28.4% conversion efficiency is possible with this type of optical element, which approaches the maximum possible conversion efficiency of the two-cell combination used (32.4%).

Original languageEnglish (US)
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479979448
DOIs
StatePublished - Dec 14 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: Jun 14 2015Jun 19 2015

Publication series

Name2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015

Other

Other42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
CountryUnited States
CityNew Orleans
Period6/14/156/19/15

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Keywords

  • Gerchberg-Saxton algorithm
  • diffractive optical element
  • grayscale lithography
  • spectrum splitting

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Vorndran, S. D., Ayala, S., Wu, Y., Russo, J. M., Zaverton, M. A., Milster, T., & Kostuk, R. K. (2015). Freeform surface relief diffractive optic for photovoltaic spectrum splitting. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7356158] (2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7356158