A chrysene-based liquid crystalline semiconductor for organic thin-film transistors12. Issue 14 (11th December 2017)

• Record Type: Journal Article
• Authors: He, Yaowu; Xu, Wenjun; Murtaza, Imran; Yao, Chao; Zhu, Yanan; Li, Aiyuan; He, Chao; Meng, Hong
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 14(2018)
• Page Start: 3683
• Page End: 3689
• Publication Date: 2017-12-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc05063a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Chrysene and [1]benzothieno[3, 2- b ][1]benzothiophene possess a similar electronic structure, and chrysene is expected to have better semiconductor device performance than BTBT, owing to the stronger electronic couplings. Abstract : We report the synthesis and characterization of a non-liquid crystalline material, 2-phenylchrysene (Ph-CHR), and a liquid crystalline material, 2-(4-dodecyl phenyl)chrysene (C12-Ph-CHR), and discuss their organic thin-film transistor (OTFT) device performances. The concept of designing chrysene derivatives is derived from the similar electronic structure of chrysene and [1]benzothieno[3, 2- b ][1]benzothiophene (BTBT), which is a very famous core for organic semiconductors. OTFTs, based on Ph-CHR and C12-Ph-CHR, are fabricated by vacuum-deposition on octyltrichlorosilane (OTS(8)) treated Si/SiO2 substrates. Our experimental results show that OTFTs based on Ph-CHR possess higher mobility than OTFTs based on BTBT derivative 2-phenyl[1]benzothieno[3, 2- b ][1]benzothiophene (Ph-BTBT). The liquid crystalline material C12-Ph-CHR achieves the highest carrier mobility of up to 3.07 cm 2 V −1 s −1 with an on/off ratio of 3.3 × 10 6 for polycrystalline organic thin-film transistors in ambient air. The results indicate that the chrysene derivative C12-Ph-CHR is a promising candidate for applications in electronic devices.