Embossed sheet glass lens arrays for hybrid PV modules

Roger Angel, Ryker Eads, Barry Hartweg, Zach Holman, Nick Didato

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

Abstract

In hybrid PV-CPV modules the glass entrance window of a silicon module is replaced by an array of lenses that concentrate direct sunlight onto very small but twice-as-efficient multijunction PV cells while transmitting indirect daylight to the silicon. Hybrid modules have the potential for conversion efficiciency nearly double that of conventional silicon PV modules, and could become a major source of utility scale solar electricity generation. But for commercial success the added costs of the lens array, small CPV cells and dual rather than single axis tracking must be kept low. Here we describe a method for forming large lens arrays directly from glass as part of large-scale float glass manufacturing. A wide, continuous sheet of newly formed and still soft glass is embossed like shower glass, by passage between two rollers. These imprint cylindrical lenses on the upper and lower surfaces, arrayed at right angles to each other. The lenses act together to form point foci, where the multijunction cells are located on the silicon cells. The cost of lens arrays mass-produced in this way should be little more than that of the flat glass sheets of conventional modules, which in many cases are already roll-formed with textured surfaces to reduce reflection. We describe experiments made with commercially available embossed glass and cylindrical lenses.

Original languageEnglish (US)
Title of host publication17th International Conference on Concentrator Photovoltaic Systems, CPV 2021
EditorsCesar Dominguez, Maike Wiesenfarth, Kensuke Nishioka
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735443921
DOIs
StatePublished - Sep 2 2022
Externally publishedYes
Event17th International Conference on Concentrator Photovoltaic Systems, CPV 2021 - Pforzheim, Germany
Duration: Apr 12 2021Apr 14 2021

Publication series

NameAIP Conference Proceedings
Volume2550
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference17th International Conference on Concentrator Photovoltaic Systems, CPV 2021
Country/TerritoryGermany
CityPforzheim
Period4/12/214/14/21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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