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Organic Transistor Based on Cyclopentadithiophene‐Benzothiadiazole Donor–Acceptor Copolymer for the Detection and Discrimination between Multiple Structural Isomers
Author(s) -
Khatib Muhammad,
Huynh TanPhat,
Sun Jiaxing Jeccy,
Do Thu Trang,
Sonar Prashant,
Hinkel Felix,
Müllen Klaus,
Haick Hossam
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201808188
Subject(s) - organic field effect transistor , materials science , transistor , acceptor , copolymer , supramolecular chemistry , organic semiconductor , polymer , structural isomer , active layer , field effect transistor , combinatorial chemistry , optoelectronics , nanotechnology , molecule , layer (electronics) , organic chemistry , thin film transistor , chemistry , physics , quantum mechanics , voltage , composite material , condensed matter physics
Distinguishing structural isomers is a critical and challenging task for biotechnology, chemical industry, and environmental monitoring. Approaches currently available are limited in terms of selectivity and simplicity. In this paper, a highly sensitive organic field‐effect transistor (OFET) using the cyclopentadithiophene‐benzothiadiazole (CDT‐BTZ) copolymers as a semiconductor is presented for easy and selective detection of different families of structural isomers, as well as between different isomers within each family. High accuracy discrimination is achieved over a range of concentrations using only a single sensing parameter derived from the OFET characteristic transfer curve. As a reference, other homopolymer‐ and donor–acceptor copolymer‐based OFET sensors are examined but do not have an equivalent sensing performance to that of the CDT‐BTZ‐based OFETs. Investigating the link between isomer absorption and swelling, supramolecular order and energy levels of the active layer reveals a unique effect of each isomer on the energy bands of the semiconducting polymer.