Failure of Stretchable Organic Solar Cells under Monotonic and Cyclic Loading

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dc.contributor.author Oyewole, Oluwaseun
dc.contributor.author Oyewole, Deborah
dc.contributor.author Oyelade, Omolara
dc.contributor.author Adeniji, Sharafadeen
dc.contributor.author Koech, Richard
dc.contributor.author Asare, Joseph
dc.contributor.author Agyei-Tuffour, Benjamin
dc.contributor.author Soboyejo, Winston
dc.date.accessioned 2021-04-17T10:26:23Z
dc.date.available 2021-04-17T10:26:23Z
dc.date.issued 2020-09
dc.description Journal Article en_US
dc.description.abstract Results of experimental and computational studies of failure of stretchable organic solar cells (SOSCs) are presented here. The SOSCs are produced by the deposition of poly(3,4?ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) anodic layers on prestretched poly(dimethyl?siloxane) (PDMS) substrates. This is followed by the deposition of active organic bulk heterojunction layers and cathodic eutectic gallium indium (EGaIn). Wrinkled structures are then formed by releasing the prestretched PDMS. The underlying failure associated with the formation of the wrinkled films is discussed, along with the subsequent mechanisms of deformation and cracking under monotonic and cyclic loading. Effects of monotonic and cyclic loading on the optical transmittance of the PEDOT:PSS layer and photoconversion efficiencies of the multilayered SOSC structures are also examined. An increase in the transmittance is observed as strain is applied to flatten the wrinkled structures. This enhances the power conversion efficiencies of the SOSCs as the strains increase from 0% to 32%. However, beyond this initial strain regime, the onset of overstretching decreases the optical transmittance and photoconversion efficiencies. The fatigue lifetimes of the layered SOSCs also decrease with increasing fatigue strain ranges between 10% and 25%. The decrease in the fatigue lifetimes is associated with a higher incidence of cracking and delamination. en_US
dc.publisher Macromolecular Materials and Engineering en_US
dc.subject Organic Solar Cells, Monotonic and Cyclic Loading en_US
dc.title Failure of Stretchable Organic Solar Cells under Monotonic and Cyclic Loading en_US
dc.type Article en_US

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