Universität zu Köln

Kim, Yunseul, Yang, Dongseong, Kim, Yeon-Ju, Jung, Eunhwan, Park, Jong-Jin, Choi, Yeonsu, Kim, Younghyo, Mathur, Sanjay and Kim, Dong-Yu . Azaquinoid-Based High Spin Open-Shell Conjugated Polymer for n-Type Organic Field-Effect Transistors. Adv. Mater. Interfaces. HOBOKEN: WILEY. ISSN 2196-7350

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Abstract

An open-shell quinoidal conjugated polymer exhibiting n-type semiconducting behavior is successfully synthesized and characterized. An electron-deficient azaaromatic unit is proven to reduce the energy levels of frontier orbitals via the electronegative nitrogen atom and steric hindrance within the polymer backbone. A synthesized azaquinoidal bithiophene (azaQuBT) is a quinoidal bithiophene that is end-functionalized with a pyridine ring. The open-shell quinodial conjugated polymer, poly(azaquinoidal bithiophene-thiophene), PazaQuBT-T, is synthesized using azaQuBT and thiophene. The extended quinoidal building block, which has an open-shell diradical character, induces low bandgaps, redox amphoterism, and high-spin-induced paramagnetic behavior of the resulting polymer. PazaQuBT-T achieves ambipolar charge-transport behavior in organic field-effect transistor (OFET) devices. Through a PEIE treatment onto the contact electrode, PazaQuBT-based OFETs exhibit unipolar n-channel operation with electron mobility up to 0.98 cm(2) V-1 s(-1). This work demonstrates the development of novel open-shell conjugated polymers with high-spin characteristics and n-type semiconducting property.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kim, Yunseul UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Dongseong UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Yeon-Ju UNSPECIFIED UNSPECIFIED UNSPECIFIED Jung, Eunhwan UNSPECIFIED UNSPECIFIED UNSPECIFIED Park, Jong-Jin UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Yeonsu UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Younghyo UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Dong-Yu UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-666159
DOI:	10.1002/admi.202201205
Journal or Publication Title:	Adv. Mater. Interfaces
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	2196-7350
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIGH-PERFORMANCE; SEMICONDUCTING POLYMERS; RECENT PROGRESS; SMALL MOLECULES; BUILDING-BLOCK; SUBSTITUTION; STABILITY; BACKBONE Multiple languages Chemistry, Multidisciplinary; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66615