Title
Asymmetrical [1]Benzothieno[3,2-b][1]benzothiophene (BTBT) derivatives for organic thin-film and single-crystal transistors
Author
Yicai Dong, Haiyang Li, Jie Liu, Jing Zhang, Xiaosong Shi, Yanjun Shi, Chunlei Li, Zitong Liu, Tao Li, Lang Jiang
Year
2019
Journal
Organic Electronics
Abstract
[1]benzothieno[3,2-b][1]benzothiophene (BTBT) derivatives are very famous organic semiconductors, however, researches on vacuum stability reveal that the BTBT core is unstable in vacuum, which was not conducive to systematically study the relationship between molecular structure and OFET performance. Two asymmetrical novel molecules based on BTBT adopting a new synthetic route were synthesized, namely TBTBT1 and TBTBT2, together with their optical, electrochemical and thermal characterizations were reported in this paper. The asymmetrical molecules were integrated as active layers on thin-film and single-crystal transistors with bottom-gate top-contact configuration, displaying p-type performance. Single crystal devices of TBTBT1 and TBTBT2 exhibit maximum mobility of 0.24 cm2V−1s−1 and 0.33 cm2V−1s−1, respectively. Moreover, both TBTBT1 and TBTBT2 single crystals demonstrated higher vacuum stability than BTBT, which provides opportunity for the easy fabrication of thin-film and single-crystal OFETs. Besides, the stable core molecules would enable further study of substituents effects to the packing motifs and OFET performance, which helps to understand the structure-property relationships to their undeveloped derivatives.
Instrument
V-570
Keywords
Absorption, Materials