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. Issue 16 (15th June 2016)

• Record Type: Journal Article
• Authors: Qing, Wanmei; Gong, Xiaodi; Liang, Xianfeng; Wang, Yuancheng; Yang, Sifen; Tan, Luxi; Ma, Yanping; Liu, Zitong; Li, Jing
• Is Part Of: Macromolecular rapid communications. Volume 37:Issue 16(2016)
• Page Start: 1357
• Page End: 1363
• Publication Date: 2016-06-15
• Subjects: conjugated polymers -- hydrogen bonds -- organic field effect transistors -- thieno[3, 4‐c]pyrrole‐4, 6‐dione -- vinyl linkages; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201600135
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract : 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. Abstract : The polymer backbone planarity is enhanced by the H‐bonds between the thieno[3, 4‐c]pyrrole‐4, 6‐dione (TPD) carbonyl(O) and its neighboring vinyl(H) therefore inducing its bottom contact bottom gate organic field effect transistors to reach a high performance with hole mobility up to 0.4 cm 2 V −1 s −1 and on/off ratio of 10 6 .