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- W4234865981 abstract "Abstract Chemical doping controls the electronic properties of organic semiconductors, but so far, doping protocols and mechanisms are less developed than in conventional semiconductors. Here we describe a unique, site-specific, n-type surface doping mechanism for single crystals of two benchmark organic semiconductors that produces dramatic improvement in electron transport and concurrently provides unprecedented evidence for doping-induced space charge. The surface doping chemistry specifically targets crystallographic step edges, which are known electron traps, simultaneously passivating the traps and releasing itinerant electrons. The effect on electron transport is profound: field effect electron mobility increases by as much as a factor of 10 and its temperature dependent behavior switches from thermally-activated to band-like. Our findings suggest new site-specific strategies to dope organic semiconductors that differ from the conventional redox chemistry of randomly distributed substitutional impurities. Critically, they also verify the presence of dopant-induced electron atmospheres, confirming long-standing expectations for organic systems from conventional solid-state theory." @default.
- W4234865981 created "2022-05-12" @default.
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- W4234865981 date "2021-01-08" @default.
- W4234865981 modified "2023-10-17" @default.
- W4234865981 title "Site-Specific Chemical Doping Reveals Electron Atmospheres at the Surfaces of Organic Semiconductor Crystals" @default.
- W4234865981 doi "https://doi.org/10.21203/rs.3.rs-140330/v1" @default.
- W4234865981 hasPublicationYear "2021" @default.
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