Quantifying Solar Cell Cracks in Photovoltaic Modules by Electroluminescence Imaging

Sergiu Spataru, Peter Hacke, Dezso Sera, Stephen Glick, Tamas Kerekes, Remus Teodorescu

Research output: Contribution to conferencePaperpeer-review

31 Scopus Citations

Abstract

This article proposes a method for quantifying the percentage of partially and totally disconnected solar cell cracks by analyzing electroluminescence images of the photovoltaic module taken under high- and low-current forward bias. The method is based on the analysis of the module's electroluminescence intensity distribution, applied at module and cell level. These concepts are demonstrated on a crystalline silicon photovoltaic module that was subjected to several rounds of mechanical loading and humidity-freeze cycling, causing increasing levels of solar cell cracks. The proposed method can be used as a diagnostic tool to rate cell damage or quality of modules after transportation. Moreover, the method can be automated and used in quality control for module manufacturers, installers, or as a diagnostic tool by plant operators and diagnostic service providers.

Original languageAmerican English
Number of pages6
DOIs
StatePublished - 14 Dec 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: 14 Jun 201519 Jun 2015

Conference

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

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

NREL Publication Number

  • NREL/CP-5J00-63704

Keywords

  • cell cracks
  • crystalline silicon
  • diagnosis
  • electroluminescence
  • photovoltaic module

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