- Hydrogen evolution from water using heteroatom substituted fluorene conjugated co-polymers
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The photocatalytic performance of fluorene-type polymer photocatalysts for hydrogen production from water in the presence of a sacrificial hole scavenger is significantly improved by the incorporation of heteroatoms into the bridge-head. This improvement
- Aitchison, Catherine M.,Bai, Yang,Cooper, Andrew I.,Sprick, Reiner Sebastian,Wilbraham, Liam,Woods, Duncan J.,Zwijnenburg, Martijn A.
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- Silole-containing polymers for high-efficiency polymer solar cells
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Silole-containing conjugated polymers (P1 and P2) carrying methyl and octyl substituents, respectively, on the silicon atom were synthesized by Suzuki polycondensation. They show strong absorption in the region of 300-700 nm with a band gap of about 1.9 eV. The two silole-containing conjugated polymers were used to fabricate polymer solar cells by blending with PC61BM and PC71BM as the active layer. The best performance of photovoltaic devices based on P1/PC71BM active layer exhibited power conversion efficiency (PCE) of 2.72%, whereas that of the photovoltaic cells fabricated with P2/PC71BM exhibited PCE of 5.08%. 1,8-Diiodooctane was used as an additive to adjust the morphology of the active layer during the device optimization. PCE of devices based on P2/PC71BM was further improved to 6.05% when a TiOx layer was used as a hole-blocking layer.
- Song, Jinsheng,Du, Chun,Li, Cuihong,Bo, Zhishan
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- Synthesis and characterization of arylamino end-capped silafluorenes for blue to deep-blue organic light-emitting diodes (OLEDs)
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Diphenylamino- or cabazolyl-endcapped silafluorene derivatives which show a wide energy band gap, a high fluorescence quantum yield and high stability have been designed, synthesized, and characterized. Double layer electroluminescent devices of these silafluorene derivatives exhibited efficient blue emission. The non-doped double layer OLEDs containing TDMS, TDPS, CDMS, or CDPS exhibited better electroluminescence efficiencies than those of the devices using the reference emitter DPFL-NPB, among which the best device was with TDPS, which showed a maximum current efficiency of 1.62 cd A-1 and an external quantum efficiency (EQE) of 1.36%. The solution processed device using TDPS as dopant exhibited a high performance with an EQE of 2.48% and an obviously low turn-on voltage of 4 V, when compared to the results of the reference device. The replacement of the carbon atom of the fluorene unit with a silicon atom could lower the energy gap effectively and improve the thermal stability as well as optical performances. The results indicate that the end-capped arylamino groups affect the organic light-emitting diode (OLED) performances greatly and aryl or alkyl substitution on the 9-position of a silafluorene unit is also crucial to the OLED performances of this kind of silafluorene.
- Chen, Shao Fu,Tian, Yuan,Peng, Jinghong,Zhang, Huarong,Feng, Xin Jiang,Zhang, Haixia,Xu, Xinjun,Li, Lidong,Gao, Jianhua
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- Silafluorene as a promising core for cell-permeant, highly bright and two-photon excitable fluorescent probes for live-cell imaging
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In this study, we report the synthesis, linear and non-linear photophysical studies and live-cell imaging of two two-photon activatable probes based on a silafluorene core: SiFluo-V and SiFluo-L. Thanks to their quadrupolar (A-π-D-π-A) design, these probes exhibit respectively good to impressive two-photon cross-sections (from 210 GM to 2150 GM). TD-DFT calculations support the experimental evidence that SiFluo-L displays far better two-photon absorption properties than SiFluo-V. Moreover, SiFluo-L possesses all requirements for bioimaging as it is water soluble, cell-permeant and presents a low cytotoxicity (IC80 ≥ 10 μM). It labels mitochondria in live-cell imaging at low laser power with high brightness, contrast and photostability. This study demonstrates that silafluorene is a promising core to develop new two-photon fluorophores for live-cell imaging.
- Auvray, Marie,Bolze, Frédéric,Clavier, Gilles,Mahuteau-Betzer, Florence
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- Low-band gap copolymers based on diketopyrrolopyrrole and dibenzosilole and their application in organic photovoltaics
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We report donor-acceptor copolymers incorporating electron-donating dimethylsilole and electron-withdrawing diketopyrrolopyrrole (DPP) units. To investigate effects of alkyl chain attached to the DPP unit, 2-decyltetradecyl (24-alkyl) group and 7-decylnonadecyl (29-alkyl) with linear space group were introduced to DPP units. Two polymers, P24DPP-Silole and P29DPP-Silole, exhibited low band gap of 1.46 and 1.36 eV, respectively, and low-lying lowest unoccupied molecular orbital (LUMO) energy level of ?3.85 eV. Photovoltaic devices employing P24DPP-Silole and P29DPP-Silole exhibited the highest power conversion efficiencies of 4.17% and 4.33%, respectively, with 1-chloronaphthalene (CN) as a processing additive. Morphological analyses were conducted with atomic force microscopy (AFM), transmission electron microscopy (TEM), and grazing incidence wide-angle x-ray scattering (GIWAXS) to investigate the effects of different alkyl chain on DPP units and processing additive. The analyses revealed that the addition of CN led to favorable phase separation and increased the degree of crystallinity in blend films. This study demonstrates that the copolymerization of DPP and dibenzosilole units is an effective means of narrowing the optical band gap. Furthermore, the length of alkyl chains on DPP units did not significantly affect on the photovoltaic performances and bulk heterojunction morphologies.
- Ha, Yeon Hee,Hong, Jisu,An, Tae Kyu,Yun, Hui-Jun,Kim, Kyunghun,Park, Chan Eon,Kim, Yun-Hi,Kwon, Soon-Ki
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- Organic light-emitting device
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An organic light-emitting device includes a first electrode and a second electrode facing the first electrode. An organic layer is disposed between the first electrode and the second electrode. The organic layer includes an emission layer, a first compound and a second compound.
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- Organic electroluminescent device with hole blocking layer
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The organic electroluminescent device, comprises a cathode, electron transport layer, a hole transport layer, a hole blocking layer, a light emitting layer, and an anode, wherein the hole blocking layer comprises one or more compounds (I) represented by Formula : In-flight, L1 , L2 And L3 A single bond, C is independently selected from a single bond, respectively. 1 - C12 Alkylene, C1 - C8 Alkyleneoxy, C6 - C30 Arylene, C5 - C30 Nitrogen-containing heteroarylene ;Ar1 , Ar2 And Ar3 Independently selected from C6 - C30 Aryl, C5 - C30 Heteroaryl, Ar1 Any substitution site, of the phenyl ring which may be substituted for it is when L. 1 , L2 , L3 , Ar1 , Ar2 , Ar3 Where any one or more of the substituents in substituents, have substituents, the substituents are independently selected from halogen, C. 1 - C10 Alkyl or cycloalkyl, alkenyl, C1 - C6 Alkoxy or thioalkoxy, C6 - C30 Aryl, contains heteroatoms selected from N, O, S, Si and C. 6 - C30 The aryl ;X is selected from O, S or Se.
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Paragraph 0087-0091
(2020/03/12)
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- Compound represented by general formula, and applications thereof
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The present invention discloses a compound with a structure represented by the following general formula defined in the specification, wherein L, L and L are respectively and independently selected from a single bond or selected from C1-C12 alkyl, C1-C8 alkoxy, C6-C30 substituted or unsubstituted aryl or fused ring aryl, and C5-C30 substituted or unsubstituted heterocyclic aryl or fused ring heteroaryl, Ar, Ar and Ar are respectively and independently selected from C6-C30 substituted or unsubstituted aryl or fused ring aryl, and C5-C30 substituted or unsubstituted heterocyclic aryl or fused ring heteroaryl, and X is selected from O, S and Se. The present invention further discloses an organic electroluminescent device using the compound represented by the general formula.According to the present invention, the compound as the host material in an OLED light-emitting layer has excellent device properties and excellent stability.
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Paragraph 0051-0055
(2019/07/04)
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- COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
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A compound having a high glass transition temperature, high electric stability, and/or high luminescent efficiency, and an organic light-emitting device including an emitting layer including the compound, which is represented by Formula 1: In Formula 1, A may be a moiety formed by fusing a substituted or unsubstituted indole group, as represented by Formula 1-1: When the compound represented by Formula 1 is used as a material for an emitting layer, an organic light emitting device including the compound may exhibit decreased driving voltage and improved efficiency and lifespan, as compared to OLEDs containing compounds that are available in the related art.
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- New organic electroluminescent compounds and the use of the compound of the organic electroluminescent device
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Provided are a novel organic electroluminescent compound and an organic electroluminescent device using the same. When used as a host material of an organic electroluminescent material of an OLED device, the organic electroluminescent compound disclosed herein exhibits good luminous efficiency and excellent life property as compared to the existing host material. Therefore, it may be used to manufacture OLEDs having very superior operation life.
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- Pigment additives, method of manufacturing the same and pigment dispersion compositions containing the same
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The present invention refers to novel pigment additive, manufacturing method thereof and relates to a pigment dispersion composition including, using additives pigment of the present invention optical properties surface, dispersibility and excelling in dispersion stability and have a color property, a pigment dispersion composition provides. (by machine translation)
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Paragraph 0133-0136
(2017/01/26)
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- Novel organic electroluminescent compounds and organic electroluminescent device using the same
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The present invention relates to a novel organic light-emitting compound and an organic electroluminescent device containing the same. More specifically, the organic light-emitting compound according to the present invention is selected from the following chemical formula 1 to 6. andlt;Img id = andPrime;i0030andPrime; he = andPrime;86andPrime; wi = andPrime;125andPrime; file = andPrime;pat00030.jpgandPrime; img-format = andPrime;jpgandPrime; /andgt; [In formula 1 to 6, X and Y are each independently selected from N (R_1), C (R_2) (R_3) and Si (R_4) (R_5), wherein one of either X or Y must be N (R_1); the other is C (R_2) (R_3) or Si (R_4) (R_5); and Z_1 to Z_8 are each independently selected from C (R_6) and N, wherein R_6 can be different from each other and adjacent R_6 may be bonded to each other to form a ring.] The organic light-emitting compound according to the present invention is used as a host material of the organic light-emitting material in OLED devices and shows good luminous efficiency and excellent life properties of material, compared with conventional host materials, thereby being advantageous in producing an OLED having a very good operating life.COPYRIGHT KIPO 2015
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- SILYL-CONTAINING HETEROCYCLIC COMPOUNDS AND METHODS OF USE THEREOF FOR THE TREATMENT OF VIRAL DISEASES
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The present invention relates to novel Silyl-Containing Heterocyclic Compounds of Formula (I): and pharmaceutically acceptable salts thereof, wherein A, B, C, D, E, F and L are as defined herein. The present invention also relates to compositions comprising at least one Silyl-Containing Heterocyclic Compound, and methods of using the Silyl-Containing Heterocyclic Compounds for treating or preventing HCV infection in a patient.
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- QUINOID SILAFLUORENE ORGANIC SEMICONDUCTOR MATERIAL, PREPARATION METHOD AND USE THEREOF
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A quinoid silafluorene organic semiconductor material represented by formula (I) is disclosed, in which R1, R2, R5 and R6 are selected from H or C1-C20 alkyl; R3 and R4 are selected from C1-C20 alkyl; m and n are an integer of 0 to 10. A preparation method of said quinoid silafluorene organic semiconductor material and the use thereof are also disclosed.
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Paragraph 0053-0054
(2013/03/28)
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- QUINOID SILAFLUORENE ORGANIC SEMICONDUCTOR MATERIAL, PREPARATION METHOD AND USE THEREOF
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A quinoid silafluorene organic semiconductor material represented by formula (I) is disclosed, in which R1, R2, R5 and R6 are selected from H or C1-C20 alkyl; R3 and R4 are selected from C1-C20 alkyl; m and n are an integer of 0 to 10. A preparation method of said quinoid silafluorene organic semiconductor material and the use thereof are also disclosed.
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Paragraph 0054; 0055
(2013/04/23)
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