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dc.contributor.authorLin, Yen-Hao
Nie, Wanyi
Tsai, Hsinhan
Li, Xiaoyi
Gupta, Gautam
Mohite, Aditya D.
Verduzco, Rafael
dc.date.accessioned 2016-07-07T21:09:20Z
dc.date.available 2016-07-07T21:09:20Z
dc.date.issued 2016
dc.identifier.citation Lin, Yen-Hao, Nie, Wanyi, Tsai, Hsinhan, et al.. "Supramolecular block copolymer photovoltaics through ureido-pyrimidinone hydrogen bonding interactions." RSC Advances, 6, (2016) Royal Society of Chemistry: 51562-51568. http://dx.doi.org/10.1039/C6RA09041A.
dc.identifier.urihttps://hdl.handle.net/1911/90837
dc.description.abstract A 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.
dc.language.iso eng
dc.publisher Royal Society of Chemistry
dc.rights This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.title Supramolecular block copolymer photovoltaics through ureido-pyrimidinone hydrogen bonding interactions
dc.type Journal article
dc.citation.journalTitle RSC Advances
dc.citation.volumeNumber 6
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1039/C6RA09041A
dc.type.publication publisher version
dc.citation.firstpage 51562
dc.citation.lastpage 51568


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