A chrysene-based liquid crystalline semiconductor for organic thin-film transistors

作者：He, Yaowu; Xu, Wenjun; Murtaza, Imran; Yao, Chao; Zhu, Yanan; Li, Aiyuan; He, Chao; Meng, Hong^*

来源：Journal of Materials Chemistry C, 2018, 6(14): 3683-3689.

DOI：10.1039/c7tc05063a

• FIELD-EFFECT TRANSISTORS
• SET MODEL CHEMISTRY
• CHARGE-TRANSPORT
• TOTAL ENERGIES
• POLYMERS
• STABILITY
• OPERATION
• LAYERS
• ATOMS

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 x 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.

• 出版日期2018-4-14
• 单位北京大学深圳研究生院; 南京工业大学