Benzo[1,2-b:4,5-b′]dithiophene-based copolymers applied in bottom-contact field-effect transistors
摘要:
Three copolymers of benzo[1,2-b:4,5-b ']dithiophene and 3,3'-bis(alkyl)-5,5'-bithiophene (dodecyl, tetradecyl and hexadecyl side chains) have been synthesized through Stille copolymerization. The polymers have number-average molecular weights over 20 kg/mol, are well-packed in the bulk and thin film, and possess an ionization potential of -5.1 eV in thin film, which offers stability versus oxidation in environmental conditions. The thin film packing of the polymer with dodecyl side chains leads to an excimeric emission upon excitation, which is not observed for longer side chain lengths. The presence of the dimers responsible for this excimer formation results in a device performance improvement as well. Field-effect transistors fabricated from these copolymers have On/Off ratios >10(7), equal saturation and linear hole mobilities above 10(-2) cm(2)/Vs, almost no hysteresis and turn-on voltages around 0 V in bottom-contact devices. (C) 2010 Elsevier Ltd. All rights reserved.
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.
The present invention relates to nanoparticles of π-conjugated polymers. The present invention also relates to an aqueous composition comprising these polymeric nanoparticles, to processes for making the nanoparticles, and to the use of these nanoparticles in the fabrication of electronic devices and components.
Tuning Electronic and Morphological Properties for High‐Performance Wavelength‐Selective Organic Near‐Infrared Cavity Photodetectors
作者:Jochen Vanderspikken、Quan Liu、Zhen Liu、Tom Vandermeeren、Tom Cardeynaels、Sam Gielen、Bruno Van Mele、Niko Van den Brande、Benoît Champagne、Koen Vandewal、Wouter Maes
DOI:10.1002/adfm.202108146
日期:2022.2
absorption strength. This is exploited to extend the detection range of organic narrow-band photodetectors with a full-width-at-half-maximum of 30–38 nm to wavelengths between 840 and 1340 nm, yielding detectivities in the range of 5 × 1011 to 1.75 × 1010 Jones, despite the low CT state energy of 0.98 eV. The broad wavelengthtuning range achieved using a single polymer:fullerene blend renders this system
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.
Solution-processable indenofluorenes and methods to generate solution-processable indenofluorenes
申请人:International Business Machines Corporation
公开号:US11312820B2
公开(公告)日:2022-04-26
In an embodiment, a composition is provided that includes an indenofluorene moiety; an alkyl radical, an aryl radical, or a heteroaryl radical chemically bound to the indenofluorene moiety; and an electron donor moiety bound to the indenofluorene moiety. In another embodiment, a device is provided that includes compositions described herein. In another embodiment, a method of forming a donor-acceptor small molecule or a donor-acceptor copolymer is provided that includes forming an indenofluorene moiety; forming an electron donor moiety; and reacting the indenofluorene moiety with the electron donor moiety in a cross-coupling reaction.