Title:	Extended Lifetime of Organic Solar Cells with New Non-Fullerene Acceptors
Author(s):	R. López Vicente, J. Abad, M. Espindola-Rodriguez, M. Fernández Castro, J.W. Andreasen, A. Urbina
Keywords:	Degradation, Lifetime, Organic Solar Cell, Flexible Substrate
Topic:	Perovskites and Other Non-Silicon Materials, MJs and Tandems
Subtopic:	Organic and Dye-Sensitised
Event:	37th European Photovoltaic Solar Energy Conference and Exhibition
Session:	3AO.9.6
Pages:	592 - 595
ISBN:	3-936338-73-6
Paper DOI:	10.4229/EUPVSEC20202020-3AO.9.6
Price:	0,00 EUR
Document(s):	paper, presentation

Abstract/Summary:

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Organic bulk heterojunction solar cells have increased their power conversion efficiency (PCE) well above 10% thanks to the use of non-fullerene acceptors in binary or ternary blends in its active layer or in tandem configurations. In this work we report a lifetime study of P3HT:O-IDTBR organic solar cells on ITO-free flexible substrates and a direct comparison of glass-glass and plastic-plastic encapsulation performances, with special focus on its effect on the lifetime of the devices after degradation procedures complying with the ISOS protocols for organic photovoltaic devices. The manufactured OSCs with 1cm2 active layer have power conversion efficiencies ranging from 1.9% to 3.4% depending on encapsulant material and substrate. An exponential degradation rate has been found, with bimodal behaviour for glass and time rates of t1 = 198.0 h-1; t2 = 25.4 h-1 whereas for plastic it is a single process with t = 56.9 h-1. The longest achieved T80 lifetime is 86 h. for glassencapsulated devices under an accelerated ISOS-T3 protocol.