School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen, 518055), P. R. China.
Department of Physics, International Islamic University, Islamabad, 44000), Pakistan.
Chemistry. 2018 Nov 7;24(62):16595-16602. doi: 10.1002/chem.201803542. Epub 2018 Oct 17.
Two new highly thermally stable [1]benzothieno[3,2-b][1]benzothiophene (BTBT) dimeric derivatives, namely 1,4-bis([1]benzothieno[3,2-b][1]benzothiophene-2-yl)benzene (BTBT-Ph-BTBT) and 4,4'-bis([1]benzothieno[3,2-b][1]benzothiophene-2-yl)-1,1'-biphenyl (BTBT-DPh-BTBT), were synthesized by combining two simple fragment structures. Compared to the monomer compound 2-phenyl[1]benzothieno[3,2-b][1]benzothiophene (Ph-BTBT, μ =3.4×10 cm V s ), the organic thin-film transistors (OTFTs) based on BTBT-Ph-BTBT and BTBT-DPh-BTBT showed significantly higher mobility (up to 2.5 and 3.6 cm V s for BTBT-Ph-BTBT and BTBT-DPh-BTBT, respectively). The mobility of OTFTs based on BTBT-Ph-BTBT was kept at a high value (2.4×10 cm V s ) after the devices were thermally annealed at 350 °C. Furthermore, the organic phototransistors (OPTs) based on BTBT-Ph-BTBT and BTBT-DPh-BTBT displayed high photosensitivities in a range of 250-400 nm with a low intensity, making these materials potentially applicable for sensitive optoelectronic devices.
两种新型的高热稳定性 [1]苯并噻吩并[3,2-b][1]苯并噻吩（BTBT）二聚体衍生物，即 1,4-双([1]苯并噻吩并[3,2-b][1]苯并噻吩-2-基)苯（BTBT-Ph-BTBT）和 4,4'-双([1]苯并噻吩并[3,2-b][1]苯并噻吩-2-基)-1,1'-联苯（BTBT-DPh-BTBT），是通过组合两个简单的片段结构合成的。与单体化合物 2-苯基[1]苯并噻吩并[3,2-b][1]苯并噻吩（Ph-BTBT，μ =3.4×10 cm V s ）相比，基于 BTBT-Ph-BTBT 和 BTBT-DPh-BTBT 的有机薄膜晶体管（OTFT）表现出明显更高的迁移率（BTBT-Ph-BTBT 和 BTBT-DPh-BTBT 分别高达 2.5 和 3.6 cm V s ）。基于 BTBT-Ph-BTBT 的 OTFT 的迁移率在器件在 350°C 下进行热退火后仍保持在较高值（2.4×10 cm V s ）。此外，基于 BTBT-Ph-BTBT 和 BTBT-DPh-BTBT 的有机光电晶体管（OPTs）在低强度下在 250-400nm 的范围内表现出高的光敏性，使这些材料有望应用于敏感的光电设备。
