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Thieno[3,4‐c]Pyrrole‐4,6‐Dione and Dithiophene‐Based Conjugated Polymer for Organic Field Effect Transistors: High Mobility Induced by Synergic Effect of H‐Bond and Vinyl Linkage
Author(s) -
Qing Wanmei,
Gong Xiaodi,
Liang Xianfeng,
Wang Yuancheng,
Yang Sifen,
Tan Luxi,
Ma Yanping,
Liu Zitong,
Li Jing
Publication year - 2016
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201600135
Subject(s) - conjugated system , pyrrole , polymer chemistry , materials science , linkage (software) , polymer , copolymer , organic chemistry , chemistry , biochemistry , gene
Here, a conjugated polymer VTTPD based on thieno[3,4‐c]pyrrole‐4,6‐dione (TPD) and dithiophene with vinyl as linker is synthesized and characterized. Electrochemical and optical studies indicate the LUMO and HOMO energies of the polymer are −3.70 and −5.39 eV. Theoretical calculation with density functional theory suggests that H‐bonds are formed between the TPD carbonyl (O) and its neighboring vinyl (H) which benefit the planarity and π‐conjugation of the polymer backbone. Bottom contact bottom gate organic field effect transistor devices based on VTTPD are fabricated and examined in air. After annealing at 160 °C, the devices exhibit excellent performance of μ h = 0.4 cm 2 V −1 s −1 , I on/off = 10 6 , V th within −10 V to −5 V. Thin film morphologies before and after the annealing process are also investigated with XRD and AFM.