- Two-Dimensional Halide Perovskite Materials
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The present disclosure relates to novel two-dimensional halide perovskite materials, and the method of making and using the two-dimensional halide perovskite materials.
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Paragraph 0134; 0139
(2021/11/05)
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- THIOPHENE MONOAMINE BASED ORGANIC-INORGANIC HYBRID PEROVSKITES
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The present disclosure relates to novel thiophene monoamine based organic-inorganic hybrid perovskites, and the method of making and using the novel organic-inorganic hybrid perovskites.
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Paragraph 0071; 0072; 0077
(2020/03/09)
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- OLIGOTHIOPHENES DERIVATIVES
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The present invention is directed to new oligothiophene derivatives and their use as a semiconductor material in electronic devices. More specifically, the present invention relates to new 3,4-dicyanooligothiophenes derivatives, processes for manufacturing thereof, and to their use as organic n-type (electron-transporting) semiconductors, in particular, in field-effect transistors (FET).
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Page/Page column 59-60
(2011/04/13)
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- Synthesis of soluble oligothiophenes bearing cyano groups, their optical and electrochemical properties
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The synthesis and the characterization of twelve new soluble oligothiophenes, possessing two to four 3,4-dicyanothiophene units in their backbone, are described. These semiconductors are prepared through Stille coupling and/or homo-coupling reactions. Cyclic voltammetry studies have been performed to evaluate their stability as n-type semiconducting materials under ambient conditions. The measured electrochemical and optical properties are fully supported by quantum-chemical calculations.
- Balandier, Jean-Yves,Quist, Florence,Amato, Claire,Bouzakraoui, Sa?d,Cornil, Jér?me,Sergeyev, Sergey,Geerts, Yves
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scheme or table
p. 9560 - 9572
(2011/01/12)
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- Alternating donor/acceptor repeat units in polythiophenes. Intramolecular charge transfer for reducing band gaps in fully substituted conjugated polymers
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This paper describes a method to limit the band gap widening that occurs in fully substituted conjugated polymers. This is done by constructing step growth [AB] polymers where the A-units are electron rich and the B-units are electron deficient. The thiophene-based polymers were prepared by modified Stille polymerizations using Pd(0)/CuI catalyst systems in which aryldibromides were coupled with aryldistannanes. The donor units were N,N′-(bis-tert-butoxycarbonyl)-3,4-diaminothiophene, N,N′-(bis-tert-butoxycarbonyl)-N,N′-(dimethyl)-3,4-diaminothiophene, 3,4-diaminothiophene, or 3,4-dialkoxythiophenes while the acceptor units were 3,4-dinitrothiophene, 3,4-(N-n-butylimido)thiophene, or 3,4-diketone-containing thiophenes. The optical spectra showed λmax values ranging from 400 to 676 nm (solution) and 400-768 (film) for these fully substituted polythiophenes, consistent with significant decreases in the band gaps. Intramolecular charge transfer character between the consecutive units explained the lowering of the band gaps. Two polymer systems based solely on electron deficient thiophenes were prepared via an Ullmann coupling which had optical absorption maxima that were in the range of 300-340 nm; considerably smaller than the λmax values for the donor/acceptor systems. Several model trimers were prepared which had significantly shorter wavelength optical absorptions than their corresponding polymers, thus confirming the need for the extended polymeric backbones.
- Zhang, Qing T.,Tour, James M.
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p. 5355 - 5360
(2007/10/03)
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