Supramolecular block copolymer photovoltaics through ureido-pyrimidinone hydrogen bonding interactions

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dc.citation.firstpage51562en_US
dc.citation.journalTitleRSC Advancesen_US
dc.citation.lastpage51568en_US
dc.citation.volumeNumber6en_US
dc.contributor.authorLin, Yen-Haoen_US
dc.contributor.authorNie, Wanyien_US
dc.contributor.authorTsai, Hsinhanen_US
dc.contributor.authorLi, Xiaoyien_US
dc.contributor.authorGupta, Gautamen_US
dc.contributor.authorMohite, Aditya D.en_US
dc.contributor.authorVerduzco, Rafaelen_US
dc.date.accessioned2016-07-07T21:09:20Zen_US
dc.date.available2016-07-07T21:09:20Zen_US
dc.date.issued2016en_US
dc.description.abstractA challenge in the development of bulk heterojunction organic photovoltaics (BHJ OPVs) is achieving a desirable nanoscale morphology. This is particularly true for polymer blend OPVs in which large-scale phase separation occurs during processing. Here, we present a versatile approach to control the morphology in polymer blend OPVs through incorporation of self-associating 4 2-ureido-4[1H]-pyrimidinone (UPy) endgroups onto donor and acceptor conjugated polymers. These UPy functionalized polymers associate to form supramolecular block copolymers during solution blending and film casting. Atomic force microscopy measurements show that supramolecular associations can improve film uniformity. We find that the performance of supramolecular block copolymer OPVs improves from 0.45% to 0.77% relative to the non-associating conjugated polymer blends at the same 155 °C annealing conditions. Impedance measurements reveal that UPy endgroups both increase the resistance for charge recombination and for bulk charge transport. This work represents a versatile approach to reducing large-scale phase separation in polymer–polymer blends and directing the morphology through supramolecular interactions.en_US
dc.identifier.citationLin, Yen-Hao, Nie, Wanyi, Tsai, Hsinhan, et al.. "Supramolecular block copolymer photovoltaics through ureido-pyrimidinone hydrogen bonding interactions." <i>RSC Advances,</i> 6, (2016) Royal Society of Chemistry: 51562-51568. http://dx.doi.org/10.1039/C6RA09041A.en_US
dc.identifier.doihttp://dx.doi.org/10.1039/C6RA09041Aen_US
dc.identifier.urihttps://hdl.handle.net/1911/90837en_US
dc.language.isoengen_US
dc.publisherRoyal Society of Chemistryen_US
dc.rightsThis Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licenceen_US
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en_US
dc.titleSupramolecular block copolymer photovoltaics through ureido-pyrimidinone hydrogen bonding interactionsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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