Early Detection of Encapsulant Discoloration by UV Fluorescence Imaging and Yellowness Index Measurements

Kshitiz Dolia, Archana Sinha, Sai Tatapudi, Jaewon Oh, Govinda Samy Tamizh Mani

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

4 Scopus citations

Abstract

The early detection of encapsulant discoloration in the indoor accelerated UV-stressed mini-modules were carried out using non-destructive methods, such as UV fluorescence (UVf) imaging, yellowness index (YI), and IV measurements. Eight labfabricated 9-cell mini-modules having glass/backsheet construction with two kinds of EVA, UV-cut EVA and UV-pass EVA, were experimented. Mini-modules with UV-cut EVA suffered from yellowing, which is clearly evident from UVf images and \DeltaYI (not to the naked eyes), whereas mini-modules with UV-pass EVA showed the signs of delamination above the cell area without any discoloration in the UVf images. Also, the activation energy for encapsulant discoloration was determined based on %I-{mathbf{sc}}drop\DeltaYI data.

Original languageEnglish (US)
Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1267-1272
Number of pages6
ISBN (Electronic)9781538685297
DOIs
StatePublished - Nov 26 2018
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: Jun 10 2018Jun 15 2018

Publication series

Name2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

Other

Other7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
CountryUnited States
CityWaikoloa Village
Period6/10/186/15/18

Keywords

  • UV fluorescence
  • accelerated stress testing
  • activation energy
  • colorimetry
  • delamination
  • encapsulant discoloration

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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