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  • Title: High-Performance Ultra-Short Channel Field-Effect Transistor Using Solution-Processable Colloidal Nanocrystals.
    Author: Fan X, Kneppe D, Sayevich V, Kleemann H, Tahn A, Leo K, Lesnyak V, Eychmüller A.
    Journal: J Phys Chem Lett; 2019 Jul 18; 10(14):4025-4031. PubMed ID: 31259561.
    Abstract:
    We demonstrate high-mobility solution-processed inorganic field-effect transistors (FETs) with ultra-short channel (USC) length using semiconductor CdSe nanocrystals (NCs). Capping of the NCs with hybrid inorganic-organic CdCl3--butylamine ligands enables coarsening of the NCs during annealing at a moderate temperature, resulting in the devices having good transport characteristics with electron mobilities in the saturation regime reaching 8 cm2 V-1 s-1. Solution-based processing of the NCs and fabrication of thin films involve neither harsh conditions nor the use of hydrazine. Employing photolithographic methods, we fabricated FETs with a vertical overlap of source and drain electrodes to achieve a submicrometer channel length. To the best of our knowledge, this is the first report on an USC FET based on colloidal semiconductor NCs. Because of a short channel length, the FETs show a normalized transconductance of 4.2 m V-1 s-1 with a high on/off ratio of 105.
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