Alkoxy-Substituted Anthra[1,2‑c:5,6‑c′]bis([1,2,5]thiadiazole) (ATz):
A New Electron-Acceptor Unit in the Semiconducting Polymers for Organic
Electronics
Posted on 2018-07-13 - 18:30
A new type of thiadiazole-based
acceptor unit and its donor–acceptor
copolymers were synthesized and characterized to develop the high-performance
semiconducting polymers for organic field-effect transistors (OFETs)
and organic photovoltaics (OPVs). We successfully synthesized an anthra[1,2-c:5,6-c′]bis([1,2,5]thiadiazole)
(ATz) core and ATz-quaterthiophene copolymers. These copolymers possess
a wide energy gap of ca. 1.8 eV and a deeper HOMO energy levels around
−5.4 eV than that of typical thiadiazole–oligothiophene
copolymers. Such weak electron-accepting nature may be due to the
decreased electron affinity of the ATz core by an existence of alkoxy
groups with strong electron-donating ability. The ATz copolymers exhibited
good semiconducting properties with hole mobility of up to 0.03 cm2 V–1 s–1 and photovoltaic
response with PCE of up to 5.7%, despite the unfavorable molecular
orders, thin-film structure, and/or amorphous structure.
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Mori, Hiroki; Nishinaga, Shuhei; Takahashi, Ryosuke; Nishihara, Yasushi (2018). Alkoxy-Substituted Anthra[1,2‑c:5,6‑c′]bis([1,2,5]thiadiazole) (ATz):
A New Electron-Acceptor Unit in the Semiconducting Polymers for Organic
Electronics. ACS Publications. Collection. https://doi.org/10.1021/acs.macromol.8b01230
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AUTHORS (4)
HM
Hiroki Mori
SN
Shuhei Nishinaga
RT
Ryosuke Takahashi
YN
Yasushi Nishihara
KEYWORDS
ATz-quaterthiophene copolymersfield-effect transistorsthin-film structurephotovoltaic responsePCEsemiconducting polymersNew Electron-Acceptor UnitOPVelectron-accepting natureelectron-donating abilityelectron affinityATz copolymershole mobility1.8 eVHOMO energy levelsSemiconducting PolymersATz corealkoxy groupsOFETsemiconducting propertiesenergy gapOrganic Electronicsthiadiazole-based acceptor unit