首页|Asymmetric side-chain engineering of organic semiconductor for ultrasensitive gas sensing
Asymmetric side-chain engineering of organic semiconductor for ultrasensitive gas sensing
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Molecular structure of organic semiconductor plays a critical role in determining the performance and functionality of organic electronic devices,by optimizing the electrical,optical and physicochemical prop-erties.Substituted alkyl chains are fundamental units in tailering the solubility and assemblability,among which the asymmetric properties have been reported as key element for controlling the packing motifs and intrinsic charge transport.Here,we expanded the scope of molecular asymmetry dependent sensing features based on a new series of naphthalene diimides(NDI)-based derivatives substituted with a same branching alkyl chain but various linear-shaped alkyl chains(Cn-).A clear molecular stacking change,from head-to-head bilayer to head-to-tail monolayer packing model,is observed based on the features of anisotropic molecular interactions with the change in the chain length.Most importantly,a unique LUMO level shift of 0.17 eV is validated for NDI-PhC4,providing a record sensitivity up to 150％to 0.01 ppb ammonia,due to the desired molecular reactivity and device amplification properties.These results indicate that asymmetric side-chain engineering opens a route for breath healthcare.
Organic thin film transistorAsymmetric side chainGas sensingMolecular stackingEnergy level manipulating
School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China
Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China
Binzhou Institute of Technology,Binzhou 256606,China
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国家自然科学基金国家自然科学基金北京市自然科学基金Chinese Academy of Scinece中央高校基本科研业务费专项
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