474416-61-0

Upstream product

• 498-62-4 3-thiophene carboxaldehyde 
• 31936-92-2 1,1-di(thien-3-yl)-methanol 
• 474416-59-6 bis(2-iodothiophen-3-yl)methanol 

Downstream Products

• 25796-77-4 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one 
• 365547-20-2 4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene 
• 389-58-2 4H-cyclopenta[2,1-b;3,4-b']dithiophene 
• 365547-21-3 2,6-dibromo-4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b']dithiophene 
• 1315276-46-0 6-[4-(diphenylamino)phenyl]-4,4-dihexyl-4H-cyclopenta[2,1-b:3,4-b′]dithiophene-2-carbaldehyde 
• 153312-86-8 4,4-dihexyl-4H-cyclopenta[1,2-b:5,4-b’]dithiophene 
• 1221821-39-1 6-bromo-4,4-dihexyl-4H-cyclopenta[2,1-b:3,4-b′]dithiophene-2-carbaldehyde 
• 636588-79-9 2,6-dibromo-4H-cyclopenta[2,1-b:3,4-b′]dithiophen-4-one 
• 1295502-20-3 5-(3,7-dimethyloctyl)-5-(3-methyloctyl)-5Hdithieno[3,2-b:2',3'-d]pyran 
• 1295502-12-3 5H-dithieno[3,2-b:2',3'-d]pyran-5-one 

Relevant academic research and scientific papers

Synthesis of 2,6-diiodo-4,4-ethylenedioxy-4H-cyclopenta-[2,1-b:3,4- b′]dithiophene and conjugated copolymers on its basis

New synthesised conjugated copolymers based on 4H-cyclopenta[2,1-b:3,4-b'] dithiophene exhibit the absorption of light in the red spectral region with the maximum at 580-590 nm and optical bandgaps of 1.85-1.88 eV. Organic photovoltaic cells prepared from

COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME

The present specification relates to a compound and an organic light emitting device comprising the same. The compound is represented by chemical formula 1. The abovementioned compound can be used as a material for an organic material layer of an organic light emitting device. The compound according to at least one embodiment of the present invention can improve the efficiency, the low driving voltage and/or the lifetime characteristics in the organic light emitting device.COPYRIGHT KIPO 2018

POLYMER COMPOUND

The invention relates to a polymer compound. A photoelectric conversion device that contains the polymer compound having a structural unit represented by formula (1) has high photoelectric conversion efficiency. (wherein, X1 and X2 are the same or different and represent a nitrogen atom or -CH-. Y1 represents a sulfur atom, an oxygen atom, a selenium atom, -N(R1)- or -CR2-CR3-. R1, R2 and R3 are the same or different and represent a hydrogen atom or a substituent. W1 represents a cyano group, a monovalent organic group having a fluorine atom or a halogen atom. W2 represents a cyano group, a monovalent organic group having a fluorine atom, a halogen atom or a hydrogen atom.

Compound used for forming high-molecular compound

The present invention provides a macromolecular compound by which the short-circuit current density and the photoelectric conversion efficiency are enhanced when the macromolecular compound is used in an organic layer contained in a photovoltaic cell. Specifically, the present invention provides a macromolecular compound having a structural unit represented by Formula (5): wherein R52 and R53 are the same as or different from each other and represent hydrogen atoms, halogen atoms, alkyl groups, alkyl oxygen radicals, alkyl sulfonium, aryl groups, aryl oxygen radicals, aryl sulfonium, aryl alkyl, aryl alkyl oxygen radicals, acyl groups, acyloxy, acylamino, imide groups, amidogen, substituted amino, substituted silicyl, substituted silicon alkyl oxygen radicals, substituted silicon alkyl harvard, silicon alkyl amine, univalent heterocyclic radical, heterocyclic oxygen radicals, heterocyclic sulfonium, aryl alkenyl, aryl alkynyl, carboxyl or cyan; W1 and W2 are the same as or different from each other and represent hydrogen atoms, halogen atoms, alkyl sulfonate base, aryl sulfonic acid ester base, aryl alkyl sulfonate base, boric acid ester residues, matte methyl, scales base, Phosphonic acid ester methyl, single halogenated methyl, boric acid residues, formyl groups, vinyl or organic tin residues.

A versatile synthesis of long-wavelength-excitable BODIPY dyes from readily modifiable cyclopenta[2,1- B:3,4- B′ ]dithiophenes

Knoevenagel condensation of a simple methylated borondipyrromethene (Bodipy) with 4,4′-dihexyl-4H-cyclopenta-[2,1-b:3,4-b′]dithiophenes functionalized at one end by a triphenylamine residue and at the other by a carbaldehyde fragment leads to novel dye species. These bisvinylic derivatives exhibit pronounced absorption in the visible range extending above 850 nm. Addition of other Bodipy units by coupling to a central iodophenyl entity enables filling of the gaps in absorption of the pivotal starting material. Efficient cascade energy transfer between the Bodipys is facilitated by spectral overlap between the energy donor and the energy acceptor. All photons between 350 nm and 750 nm are channeled to the distyryl centers which emit at 864 nm. Georg Thieme Verlag Stuttgart. New York.

Synthesis and characterization of bridged bithiophene-based conjugated polymers for photovoltaic applications: Acceptor strength and ternary blends

Six of three-component donor-acceptor random copolymers P1-P6, symbolized as (thiophene donor)m -(thiophene acceptor)n, were rationally designed and successfully synthesized by the palladium-catalyzed Stille coupling. The 4H-cyclopenta[2,l-b:3,4-b']dithiophene (CPDT) unit serves as the donor for Pl-P4, while the benzothiadiazole (BT), quinoxaline (QU), dithienoquinoxaline, and thienopyrazine (TP) units are used as the acceptor for P1, P2, P3, and P4, respectively. P5 and P6 are structurally analogous to P1 and P2 except for using the dithieno[3,2-b:2',3'-d]silole (DTS) unit as the donor. Because the band gap lowering ability of the acceptor units in the polymer is in the order TP > BT > QU presumably due to the quinoid form population in the polymers, the optical band gaps can be well adjusted to be 1.2,1.6, and 1.8 eV for P4, P1, and P2, respectively. It is found that the two bridged bithiophene units, CPDT and DTS, have similar steric and electronic effects on the P1 and P5 as well as P2 and P6, respectively, leading to comparable intrinsic properties and device performances. Bulk heterojunction photovoltaic cells based on ITO/PEDOT:PSS/polymer:PC7BM/Ca/Al configuration were fabricated and characterized. Although P4 exhibits the lowest optical band gap, broadest absorption spectrum, and highest mobility, the too low-lying LUMO level hinders the efficient exciton dissociation, resulting in a low PCE of 0.7%. Compared with poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b'] dithiophene)-alt-4,7-(2,l,3-benzothiadiazole)] (PCPDTBT), random copolymer P1 shows more blue-shifted, broader absorption spectrum, comparable mobility, and a higher PCE of 2.0%. In view of the fact that P1 shows a higher band gap with strong absorption in visible region, while PCPDTBT has a lower band gap to mainly absorb NIR light, a BHJ device with the active layer containing ternary blend of PCPDTBT/P1/PC71BM was investigated and achieved an enhanced PCE of 2.5%, which outperforms the devices based on the binary blending systems of PCPDTBT/ PC71BM(PCE = 1.4%)orP1/PC71BM(PCE = 2.0%) under the identical conditions. Such an improvement is ascribed to the complementary absorption and compatible structure of P1 and PCPDTBT polymers.

A new, improved and convenient synthesis of 4H-cyclopenta[2,1-b:3,4-b′]-dithiophen-4-one

A new and efficient three-step synthesis of 4H-cyclopenta[2,1-b:3,4-b′]dithiophen-4-one (CDT) (1) is described. This was achieved by a one-pot, regiospecific synthesis of bis(2-iodo-3-thienyl)methanol (13), its subsequent oxidation to the bls(2-iodo-3-thienyl) ketone (14) which after Ullmann coupling yielded the title compound 1.