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• W2891801529 abstract "Abstract Many organic semiconductors (OSCs) inherit chiral alkyl chains, which ensure the desirable high solubility for solution‐processing but may also lead to disorder, inhomogeneous film‐formation, as well as interfacial defects due to the presence of mixtures of stereoisomers or diastereomers, which impair their peak performance. Here, single‐crystal field‐effect transistors (SCFETs) of a diketopyrrolopyrrole‐based organic semiconductor with chiral 2‐ethylhexyl substituents by sublimation in air and organic ribbon mask method are fabricated. Devices of the mesomer ( R / S ), both enantiomers ( R / R , S / S ), as well as mixtures of these three stereoisomers measured under ambient conditions exhibit all appreciable p‐channel charge carrier mobilities of > 0.1 cm 2 V −1 s −1 despite different packing arrangement in the R / S , R / R (or S / S ), and racemate crystal structures. These results suggest a surprising tolerance for isomeric impurities. The highest literature‐reported p‐channel mobility so far for a diketopyrrolopyrrole‐based OSC of 3.4 cm 2 V −1 s −1 ( I on / I off of 1 × 10 6 ) is, however, only obtained for the pure R / S mesomer, illustrating the inherent potential of stereochemical purity. These results on SCFETs are further substantiated by studies on organic thin‐film transistors (OTFTs) of pure and mixed thin films of the different stereoisomers." @default.
• W2891801529 created "2018-09-27" @default.
• W2891801529 creator A5000199437 @default.
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• W2891801529 date "2018-09-14" @default.
• W2891801529 modified "2023-10-18" @default.
• W2891801529 title "Impact of 2‐Ethylhexyl Stereoisomers on the Electrical Performance of Single‐Crystal Field‐Effect Transistors" @default.
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• W2891801529 doi "https://doi.org/10.1002/adma.201804032" @default.
• W2891801529 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30216567" @default.
• W2891801529 hasPublicationYear "2018" @default.
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