ИСТИНА

Main characteristics of organic field effect transistors (OFETs) significantly depends on chemical structure and purity of the organic semiconductors as well as their morphology. Recently we introduced a novel concept of the molecular self-doping, in which a higher luminescent dopant emerges as a minute-amount by-product during the host material synthesis [1]. Self-doping is advantageous for improved excitonic transport and host-dopant energy transfer in highly luminescent semiconducting organic single crystals for optoelectronics [2]. Monolayer OFETs are interesting due to low consumption of the organic semiconductors as well as their unique sensitivity to the environment, which allows creation of ultrasensitive gas sensors [3]. Monolayer OFETs can be prepared either by physisorption or by self-assembly. The former are single-crystal monolayers of unprecedented structural order grown from solution by drop or spin casting with subsequent slow solvent evaporation, which demonstrated excellent performance in OFETs [4]. The latter are highly stable organosilicon derivatives of organic semiconductors capable to self-assembly on the water-air interface, which allows to produce SAMFETs and ultrasensitive gas sensors based on them [5-7]. The synthetic work was made in the framework of Leading Science School (grant NSh-5698.2018.3), investigations of monocrystals was supported by RSF (grant 18-12-00499), gas sensors – by RFBR (grants 16-29-05321 and 17-03-00222). References 1. O.D. Parashchuk et. al., Adv. Funct. Mater. 2018, 28(21), 1800116 2. L.G. Kudryashova et. al., ACS Applied Materials & Interfaces, 2016, 8(16), 10088–10092 3. A.S. Sizov, E.V. Agina, S.A. Ponomarenko, Russ. Chem. Rev., 2018, 87(12), 1226–1264 4. V.V. Bruevich at. al., ACS Appl. Mater. 2019, ASAP, DOI: 10.1021/acsami.8b20700 5. O.V. Borshchev et. al. Chem. Comm., 2017, 53, 885-888 6. A.A. Trul, J. Mater. Chem. C, 2018, 6, 9649-9659 7. A.S. Sizov at. al., ACS Appl. Mater. Interfaces, 2018, 10(50), 43831–43841