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- W2152533478 abstract "Single-crystal organic field-effect transistors (OFETs) based on p-channel molecular semiconductors have led to breakthrough carrier mobilities and to the observation of band-like transport. These results represent the limit in our quest for the ultimate OFET performance. However, band-like transport has not been reported for n-channel OFETs and, for p-channel transistors, it is not understood why it occurs only for certain molecular materials. Here we report band-like electron transport for n-channel OFETs based on PDIF-CN2 single-crystals. Devices with different gate dielectrics - vacuum, Cytop, PMMA - are compared and we find that the performance is suppressed for those with larger dielectric constant. This phenomenon parallels that observed for holes in p-channel OFETs, however, the magnitude of the suppression is smaller, an effect that can be rationalized by the semiconductor molecular structure and crystal packing. A quantitative analysis of our findings, together with results on different high-quality p-channel transistors, indicates the importance of the interplay between the semiconductor molecular polarizability and the structure of the charge transport layers in the crystal, as a key factor enabling band-like transport. Based on these considerations, we suggest unprecedented structure-property relationships useful for performance optimization of high-mobility organic transistors." @default.
- W2152533478 created "2016-06-24" @default.
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- W2152533478 date "2011-12-27" @default.
- W2152533478 modified "2023-10-10" @default.
- W2152533478 title "Band-Like Electron Transport in Organic Transistors and Implication of the Molecular Structure for Performance Optimization" @default.
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- W2152533478 doi "https://doi.org/10.1002/adma.201103960" @default.
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