Intrinsically Stretchable Organic Solar Cells without Cracks under 40% Strain

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Intrinsically stretchable organic solar cells (IS-OSCs) have been recently spotlighted for their omnidirectional stretchability, seamless integrability to any surface, and facile fabrication. Due to these attributes, IS-OSCs are ideal off-grid power sources, especially for wearable electronics in real-life. However, under human body elongation as high as approximate to 40%, cracks in IS-OSCs are considered inevitable, and the origin of the mechanical failure is rarely identified. Herein, the crack-initiation and the propagation mechanism are first clarified. Based on this, a crack-free substrate/transparent electrode platform for stretchable electronics is also suggested. A double-locking scheme, which reinforces the physical/chemical adsorption within the most mechanically fragile layer, a poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and also with thermoplastic polyurethane substrate, is introduced. As a result, the crack-onset strain of double-locked IS-OSCs surpasses 40%, while that of pristine ones is less than 20%. The IS-OSCs with the double-locked system exhibits an efficient power conversion efficiency of 10.2%, and the absence of cracks allows the IS-OSCs to maintain 79.7% of the initial PCE at 40% strain.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2023-08
Language
English
Article Type
Article
Citation

ADVANCED ENERGY MATERIALS, v.13, no.30

ISSN
1614-6832
DOI
10.1002/aenm.202300533
URI
http://hdl.handle.net/10203/311837
Appears in Collection
ME-Journal Papers(저널논문)CBE-Journal Papers(저널논문)EE-Journal Papers(저널논문)
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