Adhesion of Antireflective Coatings in Multijunction Photovoltaics

David Miller, Ryan Brock, Reinhold Dauskardt

Research output: Contribution to conferencePaperpeer-review


The development of a new composite dual cantilever beam (cDCB) thin-film adhesion testing method is reported, which allows the measurement of adhesion on the fragile thin substrates used in multijunction photovoltaics. We address the adhesion of several antireflective coating systems on multijunction cells. By varying interface chemistry and morphology, we demonstrate the ensuing effects on adhesion and help to develop an understanding of how high adhesion can be achieved, as adhesion values ranging from 0.5 J/m2 to 8 J/m2 were measured. Damp Heat (85 °C/85% RH) was used to invoke degradation of interfacial adhesion. We show that even with germanium substrates that fracture easily, quantitative measurements of adhesion can still be made at high test yield. The cDCB test is discussed as an important new methodology, which can be broadly applied to any system that makes use of thin, brittle, or otherwise fragile substrates.

Original languageAmerican English
Number of pages4
StatePublished - 18 Nov 2016
Event43rd IEEE Photovoltaic Specialists Conference, PVSC 2016 - Portland, United States
Duration: 5 Jun 201610 Jun 2016


Conference43rd IEEE Photovoltaic Specialists Conference, PVSC 2016
Country/TerritoryUnited States

Bibliographical note

See NREL/CP-5J00-66495 for preprint

NREL Publication Number

  • NREL/CP-5J00-67922


  • adhesion
  • antireflective
  • concentrator photovoltaic
  • delamination
  • durability
  • multijunction cell
  • reliability


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