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Photostability of Plasma Polymerized γ-terpinene Thin Films for Encapsulation of OPV

Photostability of Plasma Polymerized γ-terpinene Thin Films for Encapsulation of OPV

Kateryna Bazaka, Jakaria Ahmad, Michael Oelgemöller, Ashraf Uddin, Mohan V Jacob

Sci Rep. 2017 Mar 30;7:45599.

PMID: 28358138

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP99854	γ-Terpinene		99-85-4	Price

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