Conjugated Polymer Entailing Arylazopyrazole Units in the Side Chains for Optically Tunable Field-Effect Transistors by Near Infra-red Light

Optically tunable field-effect transistors (FETs) with near infra-red (NIR) light show promising applications in various areas. Here, we incorporate arylazopyrazole groups in the side chains of a semiconducting donor-acceptor (D-A) polymer. The cis - trans interconversion of the arylazopyrazole can...

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Bibliographic Details
Published inAngewandte Chemie International Edition
Main Authors Tian, Jianwu, Liu, Zitong, Jiang, Wenlin, Shi, Dandan, Chen, Liangliang, Zhang, Xisha, Zhang, Guanxin, Di, Chong-An, Zhang, Deqing
Format Journal Article
LanguageEnglish
Published Germany 09.05.2020
Subjects
arylazopyrazole
photothermal effect
optically tunable field-effect transistors
upconversion nanoparticle
conjugated polymers
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Summary:Optically tunable field-effect transistors (FETs) with near infra-red (NIR) light show promising applications in various areas. Here, we incorporate arylazopyrazole groups in the side chains of a semiconducting donor-acceptor (D-A) polymer. The cis - trans interconversion of the arylazopyrazole can be controlled by 980 nm and 808 nm NIR light irradiation, by utilising NaYF 4 :Yb,Tm upconversion nanoparticles and the photothermal effect of conjugated D-A polymers, respectively. This reversible transformation affects the interchain packing of the polymer thin film, which in turn reversibly tunes the semiconducting properties of the FETs by the successive 980 nm and 808 nm light irradiation. The resultant FETs display fast response to NIR light, good resistance to photofatigue, and stability in storage for up to 120 days. These unique features will be useful in future memory and bioelectronic wearable devices.
ISSN:1521-3773