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Role of Stress Factors on the Adhesion of Interfaces in R2R Fabricated Organic Photovoltaics
Author(s) -
Corazza Michael,
Rolston Nicholas,
Dauskardt Reinhold H.,
Beliatis MichailJ.,
Krebs Frederik C.,
Gevorgyan Suren A.
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201501927
Subject(s) - materials science , adhesion , photovoltaics , photovoltaic system , optoelectronics , stress (linguistics) , composite material , nanotechnology , electrical engineering , linguistics , philosophy , engineering
The role of the common stress factors such as high temperature, humidity, and UV irradiation on interface adhesion of roll‐to‐roll fabricated organic photovoltaic (OPV) devices is investigated. The samples range from bare front electrodes to complete devices. It is shown that applying single stress or combinations of stresses onto the samples variably affect the adhesion properties of the different interfaces in the OPV device. It is revealed that while the exposure of the complete devices to the stresses results in the loss of photovoltaic performance, some interfaces in the devices present improved adhesion properties. Depth profiling analysis on the fractured samples reveals interdiffusion of layers in the structure, which results in the increase of adhesion and change of the debond path. It is shown that through diffusion and intermixing of internal interfaces coupled stresses can increase the adhesion of OPV interfaces by over tenfold. The results are additionally compared to the photovoltaic performance of the complete devices.