Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 49, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/12/125604
Keywords
lifetime; degradation; stabilization; ternary blend; UV screening; organic solar cells; Brazilian MRS
Categories
Funding
- Federal State of Thuringia via the Landesgraduierten Stipendium
- Federal Ministry of Education and Research (BMBF) [03X3516F]
- Interreg 4A Syddanmark-Schleswig-K.E.R.N
- Det Frie Forskningsrad
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We are reporting on the successful implementation of UV absorbers for the long-term stabilization of organic photovoltaic devices (OPV). A set of six commercially available representatives of main UV absorber classes, commonly used for insulating plastics, were ternary-blended into the active layer, and the OPV performances were recorded under International Summit on OPV Stability standards (ISOS-3) degradation conditions. An improvement in the long-term performance of the OPV devices, manifested in the accumulated power generation (APG) increase for over a factor of 3, was found for 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl) oxy]phenol. This improvement is governed by a significantly decreased PCE loss during the burn-in period. Fourier transform infrared spectroscopy (FTIR) spectroscopy, used to trace chemical degradation over time, indicates that the stabilization of the active layer occurs due to a reduced formation of radicals facilitated by the UV screening properties of the additive.
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