City Research Online

Abstract

A new polythiophene derivative with phenothiazine-vinylene (PTZ V) conjugated side chains, PTZV-PT , was synthesized through the Stille coupling reaction, and characterized by 1 H NMR, elemental analysis, GPC, TGA, DSC, UV-vis absorption spectroscopy, photoluminescence spectroscopy and cyclic voltamm etry. The polymer is soluble in common organic solvents and possesses good thermal s tability with 5% weight loss at the temperature of 397°C and T g of 140°C. The weight-average molecular weight of PTZV-PT was 5.45 × 10 4 with the polydispersity index of 1.48. The absorption spectrum of PTZV-PT film displays a broad plateau between 300 and 600 nm. The hole mobility of PTZV-PT determined from space-charge-limited current model was 4.7 × 10 -3 cm 2 V -1 s -1 . The field effect hole mobility of the copolymer was as high as 6.8 × 10 -3 cm 2 ·V -1 s -1 with an on/off ratio of 2.5 × 10 4 , which is among the best performance of the copolymers reported for the solution-process ed organic field effect transistors (OFETs). The preliminary results indicate that PTZV-PT is a promising polymer material for applications in solution-processable OFETs .

Publication Type:	Article
Publisher Keywords:	Conjugated polymers, polythiophenes, phenothiazine-vinylene side chains, hole mobility, organic field effect transistors.
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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