Chemicrea. Inc.

Iwaki, Japan

Chemicrea. Inc.

Iwaki, Japan
SEARCH FILTERS
Time filter
Source Type

Patent
Chemicrea. Inc. | Date: 2016-12-14

A photosensitizer is a dye represented by the following formula (I) or its salt. In the following chemical formula, m represents an integer of 0 through 4, and n represents an integer of 0 or 1, and p represents an integer of 0 to 2. R_(1), R_(2 )and R_(3 )represent a hydrogen atom, an alkyl group, an aryl group or the like. R_(4), R_(4), R_(4), R_(5), R_(6), R_(7), R_(8 )and R_(9 )represent a hydrogen atom, an alkyl group and the like. X represents a carbonyl group or the like. Z_(1 )and Z_(2 )represent a carboxyl group or the like:


Patent
Chemicrea. Inc. | Date: 2017-04-26

[Aim] To provide a photosensitizer having excellent conversion efficiency and durability. [Solution Means] A photosensitizer that is a dye represented by the following formula (I) or its salt. In the following chemical formula, m represents an integer of 0 through 4, and n represents an integer of 0 or 1, and p represents an integer of 0 to 2. R_(1), R_(2) and R_(3) represent a hydrogen atom, an alkyl group, an aryl group or the like. R_(4), R_(4), R_(4), R_(5), R_(6), R_(7), R_(8) and R_(9) represent a hydrogen atom, an alkyl group and the like. X represents a carbonyl group or the like. Z_(1) and Z_(2) represent a carboxyl group or the like:


Saito T.,RIKEN | Saito T.,University of Tokyo | Morita M.,RIKEN | Morita M.,Chemicrea. Inc. | And 4 more authors.
Organic Letters | Year: 2017

Stereoselective synthesis of the ent-ZA′B′C′D′-ring system of maitotoxin has been accomplished through a convergent strategy utilizing Suzuki-Miyaura cross coupling reaction of ZA′-ring alkylborane and C′D′-ring (Z)-vinyl iodide, and subsequent construction of the B′-ring by reduction of the O,S-acetal. © 2017 American Chemical Society.


Wang H.,Queensland University of Technology | Liu M.,Queensland University of Technology | Zhang M.,CAS Changchun Institute of Applied Chemistry | Wang P.,CAS Changchun Institute of Applied Chemistry | And 3 more authors.
Physical Chemistry Chemical Physics | Year: 2011

The performance and electron recombination kinetics of dye-sensitized solar cells based on TiO2 films consisting of one-dimensional nanorod arrays (NR-DSSCs) which are sensitized with dyes N719, C218 and D205, respectively, have been studied. It has been found that the best efficiency is obtained with the dye C218 based NR-DSSCs, benefiting from a 40% higher short-circuit photocurrent density. However, the open circuit photovoltage of the N719 based cell is 40 mV higher than that of the organic dye C218 and D205 based devices. Investigation of the electron recombination kinetics of the NR-DSSCs has revealed that the effective electron lifetime, τn, of the different dye based NR-DSSCs shows the sequence of C218 > D205 > N719. The higher Voc with the N719 based NR-DSSC is originated from the more negative energy level of the conduction band of the TiO2 film. In addition, in comparison to the DSSCs with the conventional nanocrystalline particles based TiO2 films, the NR-DSSCs have shown over two orders of magnitude higher τn when employing N719 as the sensitizer. Nevertheless, the τn of the DSSCs with the C218 based nanorod arrays is only ten-fold higher than that of the nanoparticles based devices. The remarkable characteristic of the dye C218 in suppressing the electron recombination of DSSCs is discussed. © 2011 the Owner Societies.


Higashijima S.,Chemicrea. Inc. | Higashijima S.,Gifu University | Inoue Y.,Chemicrea. Inc. | Miura H.,Chemicrea. Inc. | And 4 more authors.
RSC Advances | Year: 2012

A novel idoline dye, having dimethylfluorene-substituted indoline donor and dicyanovinylidene-introduced rhodanine acceptor (DN350), gave much higher efficiency than D205 due to bathochromic absorption band and prevention of aggregates formation. © 2012 The Royal Society of Chemistry.


Sakuragi Y.,Gifu University | Wang X.-F.,Gifu University | Miura H.,Chemicrea. Inc. | Matsui M.,Gifu University | Yoshida T.,Gifu University
Journal of Photochemistry and Photobiology A: Chemistry | Year: 2010

Properties of indoline dye, D149, as a sensitizer for electrodeposited porous ZnO has been studied in detail. Control of adsorption time and use of co-adsorbing cholic acid (CA) were essential to achieve high efficiencies, because of aggregation of D149 to worsen the fill factor of solar cells. Adsorption isotherm measured for D149 on ZnO powder indicated 1.5 layer adsorption at saturation. Use of CA significantly improved the cell performance as it prevents aggregation and decreases the amount of D149 adsorbed. Impedance analysis of the cells with different levels of dye loading showed that dye aggregates form deep traps to promote recombination even at low cell voltages, thus resulting in an I-V curve with rounded shoulder with poor fill factor. A new indoline dye DN-7 turned out to behave much better in this regard, allowing foolproof reproduction of stably high efficiencies as its aggregation is much more relaxed than D149 and worsening of the fill factor can be avoided. © 2010 Elsevier B.V.


Higashijima S.,Chemicrea. Inc. | Higashijima S.,Gifu University | Miura H.,Chemicrea. Inc. | Fujita T.,Gifu University | And 4 more authors.
Tetrahedron | Year: 2011

New indoline dye (DN319) having strong electron-withdrawing dicyanovinylidene moiety and octyl group in the terminal rhodanine ring gave higher efficiency than D205, which was known as an excellent organic dye sensitizer. This result is attributed to the bathochromic shift in the UV-vis absorption band and positive shift in the Eox level of DN319. © 2011 Elsevier Ltd.


Funabiki K.,Gifu University | Mase H.,Gifu University | Saito Y.,Dai ichi Kogyo Seiyaku Co. | Otsuka A.,Sekisuijushi Technical Research Corporation | And 7 more authors.
Organic Letters | Year: 2012

Novel near-infrared (NIR)-sensitizing (up to 800 nm) simple asymmetric squaraine dyes (Sq 31 and Sq 33) carrying indoline moieties that did not require the introduction of any linker groups were developed. DSSCs fabricated with Sq 33 exhibited remarkable characteristics in the long-wavelength visible and NIR region (up to 800 nm), such as a conversion efficiency of 3.75% (AM 1.5G) with an incident photon-to-current conversion efficiency of 63% (650 nm), a short-circuit photocurrent density of 13.64 mA, an open-circuit photovoltage of 0.48, and a fill factor of 0.57. © 2012 American Chemical Society.


Kajiyama S.,University of Tsukuba | Kajiyama S.,Chemicrea. Inc. | Uemura Y.,University of Tsukuba | Uemura Y.,Japan National Institute of Advanced Industrial Science and Technology | And 4 more authors.
Dyes and Pigments | Year: 2012

Organic dyes with the oligohexylthiophene linkage having several donor parts, carbazole, indole, and indoline, were newly synthesized as sensitizers for dye-sensitized solar cells. The carbazole was most efficient donor moiety for DSSCs among these dyes with the oligothiophene linkage. Carbazole dyes were adsorbed with larger amount of molecules on the TiO2 film than both indole dyes and indoline dyes. Therefore, both the VOC and the electron lifetime of DSSCs with the carbazole dyes were highly observed. The decreasing of JSC of DSSCs with indole and indoline dyes also caused by the reducing the adsorption amount of dyes. © 2011 Elsevier Ltd. All rights reserved.


Patent
Chemicrea. Inc. | Date: 2010-03-24

It is intended to stabilize an aqueous solution of isothiazolone compounds, which contain 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one. A nitrate in a proportion of 3% by weight to 25% by weight and a haloacetamide in a proportion of 5ppm to 500ppm are added to the aqueous solution of the isothiazolone compounds, which contain 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one.

Loading Chemicrea. Inc. collaborators
Loading Chemicrea. Inc. collaborators