A novel diketopyrrolopyrrole-based pi-conjugated copolymer P(DPP-alt-DTBSe), 5, and a known copolymer P(DPP-alt-QT), 4, have been synthesized in 80-90% yield using the Stille coupling reaction. The molecular weights of 4 and 5 are 58 781 and 19 271 g/mol, respectively, with polydispersity values of 3.25-3.35. A relatively small band gap of 1.32-1.39 eV and excellent solubility in organic solvents were achieved in the two polymers. Thin-film transistors made of 5 exhibit outstanding performance (e.g., mu > 1.0-1.5 cm(2).V(-1)s(-1), I-on/I-off > 10(5)-10(6)) with a conventional n-octyltrichlorosilane-SiO2 gate dielectric.
Synthesis and field-effect properties of α,ω -disubstituted sexithiophenes bearing polar groups
作者:Antonio Dell'Aquila、Piero Mastrorilli、Cosimo Francesco Nobile、Giuseppe Romanazzi、Gian Paolo Suranna、Luisa Torsi、Maria Cristina Tanese、Domenico Acierno、Eugenio Amendola、Piero Morales
DOI:10.1039/b515583e
日期:——
The synthesis of sexithiophenes bearing amide or ester groups in the α,Ï-terminal positions is described, along with their characterization in the solid state. The influence of the functional group on mobilities and on/off ratios of the organic FET devices was investigated. The oligomer bearing the ester functional group separated from the sexithiophene core by an ethylene spacer showed a hole field-effect mobility as high as 0.012 cm2 Vâ1 sâ1, which is among the highest reported so far for organic FETs using sexithiophenes modified with polar groups.
DIOXYPYRROLO-HETEROAROMATIC COMPOUNDS AND ORGANIC ELECTRONIC DEVICES USING THE SAME
申请人:Moon Jae-Min
公开号:US20100099840A1
公开(公告)日:2010-04-22
The present invention relates to dioxypyrrolo-heterocyclic compounds and an organic electronic device using the same. The compound of the present invention satisfies the requirements for use in an organic electronic device such as an organic light emitting device, an organic thin film transistor, and an organic solar cell, for example, suitable energy levels, and the electrochemical and thermal stability, by introducing various substituents to the core structure, and also have amorphous or crystalline property depending on the Mnd of the substituents, to satisfy the characteristics individually required for each of the devices. Further, an organic semi-conductor of p-type or n-type can be fabricated by introducing various substituents to the core structure having a property of n-type, thereby providing stability for the device.
Systematic variation of thiophene substituents in photochromic spiropyrans
作者:Dushanthi S. Dissanayake、Gregory T. McCandless、Mihaela C. Stefan、Michael C. Biewer
DOI:10.1039/c7pp00057j
日期:2017.7
structural and electronic transformation upon isomerization. In order to parlay the electronic differences associated with the two isomeric forms into a materials based switch, the spiropyran ultimately requires a covalent attachment through a conjugated pathway. In this work a synthetic method was developed to incorporate spiropyran (SP) into thiophene based materials. A series of compounds with a systematic
The character of the ground state of thiophene-based heterophenoquinones depends on the nature and position of substituents on the molecular skeleton.
硫代噻吩基杂苯醌的基态特性取决于分子骨架上取代基的性质和位置。
A molecular structure and crystallization correlation study of pyromellitic diimide-based conjugated copolymers
作者:Ming-Chia Tsai、Ja-Wei Liu、Ping-Tsung Huang
DOI:10.1002/jccs.201700440
日期:2018.7
diimide(PMDI)‐based polymers—poly(pyromellitic diimide‐co‐bithiophene) [poly(PMDI‐BTh)], poly(pyromellitic diimide‐co‐tetrathiophene) [poly(PMDI‐TTh)], and poly(pyromellitic diimide‐co‐benzodithio‐ phene) [poly(PMDI‐BDTTh)]—are synthesized to study the influence of different thiophene‐containing electron‐donating groups on the crystallizability of PMDI‐based conjugatedpolymers. Computer simulation