Synthesis and characterization of oligo(2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene)s: effect of the chain length and end-groups on their optical and charge transport properties
Synthesis and characterization of oligo(2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene)s: effect of the chain length and end-groups on their optical and charge transport properties
Phase Tag-Assisted Synthesis of Benzo[<i>b</i>]carbazole End-Capped Oligothiophenes
作者:Matthew T. Levick、Susannah C. Coote、Iain Grace、Colin Lambert、Michael L. Turner、David J. Procter
DOI:10.1021/ol302748h
日期:2012.11.16
The introduction and removal of a phase tag have been used to trigger cyclization events in a new synthesis of benzo[b]carbazoles. The approach has been exploited in a tag-assisted approach to new benzo[b]carbazole end-capped oligothiophenes for preliminary evaluation as semiconductors.
在苯并[ b ]咔唑的新合成中,已使用相标记的引入和去除来引发环化事件。该方法已被用于新的苯并[ b ]咔唑封端的低聚噻吩的标签辅助方法中,用于半导体的初步评估。
Thieno[3,2-b]thiophene oligomers and their applications as p-type organic semiconductors
作者:Moawia O. Ahmed、Chunmei Wang、Peisi Keg、Wojciech Pisula、Yeng-Meng Lam、Beng S. Ong、Siu-Choon Ng、Zhi-Kuan Chen、Subodh G. Mhaisalkar
DOI:10.1039/b900979e
日期:——
This study describes the synthesis, characterization and electronic properties of a novel series of soluble thieno[3,2-b]thiophene oligomers (1a and b and 2a and b) for thin film transistor (TFT) applications. All the compounds were synthesized in high yield using Pd-catalyzed Stille or Suzuki coupling reactions and were substituted by two dodecyl groups at the 3- or 4-position of the thiophene unit to ensure the solubility for facile device fabrication. Aryl units such as phenyl and naphthyl were used for ‘end-capping’ to provide stability against oxidation. The design of these materials has focused on their self-assembly and solution processability. All the compounds have been characterized by 1H, 13C NMR, and elemental analysis. Their electronic and optical properties were investigated using UV-Vis and photoluminescence spectroscopy, cyclic voltammetry, thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC). High-resolution STM images of 1a and 2a adsorbed on HOPG revealed highly ordered self-organized domains. Two-dimensional wide-angle X-ray scattering (2D-WAXS) was used to study the solid state packing of 1a and 2a. Top-contact OTFT devices from 1a were prepared by spin coating and showed promising behaviour with mobilities up to 3.11 × 10−2 cm2V−1 s−1 and on/off ratios up to 104.
SEMICONDUCTOR MATERIALS PREPARED FROM DITHIENYLVINYLENE COPOLYMERS
申请人:Mishra Ashok Kumar
公开号:US20120217482A1
公开(公告)日:2012-08-30
Disclosed are new semiconductor materials prepared from dithienylvinylene copolymers with aromatic or heteroaromatic π-conjugated systems. Such copolymers, with little or no post-deposition heat treatment, can exhibit high charge carrier mobility and/or good current modulation characteristics. In addition, the polymers of the present teachings can possess certain processing advantages such as improved solution-processability and low annealing temperature.
doped by protonicacid in both solution and solid-state, resulting in a broad absorption in the near-infrared range corresponding to polaron and bipolaron absorption. Electrical conductivity of ca. 0.1 S cm−1 was obtained at 100 °C (to avoid the water uptake by the acid). The adducts with protons bound at the end-thiophene α-position were confirmed by 1H NuclearMagneticResonancespectra.
本文展示了如何使用质子化的 3,4-乙烯二氧噻吩部分作为端基来制造有机导体。有机半导体 2,5-双(5-(2,3-二氢噻吩并[3,4 -b ][1,4]二恶英-5-基)-3-十二烷基噻吩-2-基)噻吩并[3,2- b ]噻吩的设计和合成。该分子可以在溶液和固态中掺杂质子酸,从而在近红外范围内产生与极化子和双极化子吸收相对应的广泛吸收。电导率约在100℃下获得0.1Scm -1 (以避免酸吸收水)。通过1 H 核磁共振波谱证实了在噻吩末端 α 位结合质子的加合物。
Semiconductor materials prepared from dithienylvinylene copolymers
申请人:BASF SE
公开号:EP2626375A1
公开(公告)日:2013-08-14
Disclosed are new semiconductor materials prepared from dithienylvinylene copolymers with aromatic or heteroaromatic π-conjugated systems. Such copolymers, with little or no post-deposition heat treatment, can exhibit high charge carrier mobility and/or good current modulation characteristics. In addition, the polymers of the present teachings can possess certain processing advantages such as improved solution-processability and low annealing temperature.