Photostability of plasma polymerized γ-terpinene thin films for encapsulation of OPV

Bazaka, Kateryna, Ahmad, Jakaria, Oelgemöller, Michael, Uddin, Ashraf, and Jacob, Mohan V. (2017) Photostability of plasma polymerized γ-terpinene thin films for encapsulation of OPV. Scientific Reports, 7. 45599. pp. 1-9.

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Optically transparent, smooth, defect-free, chemically inert and with good adhesion to a variety of substrates, plasma polymers from plant-derived secondary metabolites have been identified as promising encapsulating materials for organic electronics and photovoltaics. Here, we demonstrate that an encapsulating layer of plasma polymerized γ-terpinene reduces degradation-related loss in conversion efficiency in PCPDTBT:PC70BM solar cells under ambient operating conditions. The stability of γ-terpinene films was then investigated under extreme UV irradiation conditions as a function of deposition power. When exposed to ambient air, prolonged exposure to UV–A and UV–B light led to notable ageing of the polymer. Photooxidation was identified as the main mechanism of degradation, confirmed by significantly slower ageing when oxygen was restricted through the use of a quartz cover. Under unnatural high-energy UV–C irradiation, significant photochemical degradation and oxidation occurred even in an oxygen-poor environment.

Item ID: 48283
Item Type: Article (Research - C1)
ISSN: 2045-2322
Keywords: plasma polymerization; gamma-terpinene; photostability; photooxidation; organic photovoltaic
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This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit © The Author(s) 2017

Funders: Australian Research Council (ARC), James Cook University (JCU)
Projects and Grants: ARC DP130100794 & DE130101550
Date Deposited: 04 Apr 2017 22:05
FoR Codes: 34 CHEMICAL SCIENCES > 3405 Organic chemistry > 340505 Physical organic chemistry @ 40%
40 ENGINEERING > 4016 Materials engineering > 401608 Organic semiconductors @ 30%
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics @ 30%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 50%
97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 50%
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