Synthesis of a Novel Donor Unit for Organic Light-Emitting Materials: 10-octyl-3,7-Di(thiophen-2-yl)-10H-phenothiazine

2014 ◽  
Vol 941-944 ◽  
pp. 640-643
Author(s):  
Xiao Xia Sun ◽  
Ze Biao Tang ◽  
He Wei Yan ◽  
Le Ping Miao
Keyword(s):  
Fluorescence Spectra ◽  
Green Light ◽  
Coupling Reaction ◽  
Organic Light Emitting Diodes ◽  
Target Compound ◽  
Suzuki Coupling Reaction ◽  
Light Emitting ◽  
Organic Light ◽  
Efficient Route ◽  
High Yields

A novel electron donor unit based on phenothiazine has been designed and constructed. The target compound 10-octyl-3,7-di (thiophen-2-yl)-10H-phenothiazine was easily synthesized in high yields with a milder and efficient route via the Suzuki coupling reaction. Optical spectra show that, from the solution to the solid state, both the absorption and fluorescence spectra of the target compound are small blue-shifted. Moreover, the fluorescence spectra exhibit the emission maxima of the target compound ranging from 485 nm to 496 nm, which belongs to blue-green light range. As expected, the target compound should be a promising donor to construct D-A type materials for applications in organic light-emitting diodes (OLEDs).

Synthesis of a Novel Donor Unit for Organic Light-Emitting Materials: 10-octyl-3,7-di(thiophen-2-Yl)-10H-Phenothiazine

2014 ◽  
Vol 989-994 ◽  
pp. 284-287 ◽  
Author(s):  
Ze Biao Tang ◽  
Xiao Xia Sun ◽  
Le Ping Miao ◽  
Hua Yin Shen
Keyword(s):  
Fluorescence Spectra ◽  
Green Light ◽  
Coupling Reaction ◽  
Target Compound ◽  
Suzuki Coupling Reaction ◽  
Light Emitting ◽  
Organic Light ◽  
Light Region ◽  
Efficient Route ◽  
High Yields

A novel electron donor unit based on phenothiazine has been designed and constructed. The target compound 10-octyl-3,7-di (thiophen-2-yl)-10H-phenothiazine was easily synthesized in high yields with a milder and efficient route via the Suzuki coupling reaction. Optical spectra show that, from the solution to the solid state, both the absorption and fluorescence spectra of the target compound are small blue-shifted. Moreover, the fluorescence spectra exhibit the emission maxima of the target compound ranging from 485 nm to 496 nm, which belongs to blue-green light region. As expected, the target compound should be a promising donor to construct D-A type materials for applications in organic light-emitting diodes (OLEDs).

Blue Fluorescent Organic Light-Emitting Diodes Using 11,11-Dimethyl-3-(10-phenylanthracen-9-yl)-11H-Indeno[1,2-b]Quinoline Derivatives

2020 ◽  
Vol 20 (8) ◽  
pp. 4652-4656
Author(s):  
Junyoung Moon ◽  
Jinho Lee ◽  
Ki Ju Kim ◽  
Hakjun Lee ◽  
Young Kwan Kim ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Coupling Reaction ◽  
Organic Light Emitting Diodes ◽  
Blue Fluorescence ◽  
Suzuki Coupling Reaction ◽  
Light Emitting ◽  
Organic Light ◽  
20 Nm

In this study, we designed and synthesized two blue fluorescence materials using phenylanthracenesubstituted-indenoquinoline derivatives by Suzuki coupling reaction for organic light-emitting diodes (OLEDs). In order to study their electroluminescent properties, we fabricated the OLED devices using these two materials as emissive layer (EML) with the following sequence: indium-tin-oxide (ITO, 180 nm)/4,4′,4″-tris[2-naphthyl(phenyl)-amino]triphenylamine (2-TNATA, 30 nm)/N,N′-diphenyl-N,N′-(2-napthyl)-(1,1′-phenyl)-4,4′-diamine (NPB, 20 nm)/Blue emitting materials (20 nm)/4,7-Diphenyl-1,10-phenanthroline (Bphen, 30 nm)/lithium quinolate (Liq, 2 nm)/Al (100 nm). In particular, a device using 11,11-dimethyl-3-(10-phenylanthracen-9-yl)-11H-Indeno[1,2-b]quinoline in emitting layer showed luminous efficiency, power efficiency, and external quantum efficiency of 2.18 cd/A, 1.10 lm/W, 2.20% at 20 mA/cm2, respectively, with Commission Internationale d’Énclairage (CIE) coordinates of (0.15, 0.11) at 8.0 V.

Optical Properties of 5,5'-(9,9-dioctyl-9H-fluorene-2,7-diyl)Bis(thiophene-2-carbal dehyde): A Novel Organic Light Emitting Material

2014 ◽  
Vol 941-944 ◽  
pp. 662-665
Author(s):  
Ze Biao Tang ◽  
Xiao Xia Sun ◽  
He Wei Yan ◽  
Le Ping Miao
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Fluorescence Spectra ◽  
Aldehyde Group ◽  
Organic Light Emitting Diodes ◽  
Target Compound ◽  
Absorption And Fluorescence Spectra ◽  
Light Emitting ◽  
Organic Light ◽  
Type Molecule

A novel D-A type molecule based on central fluorene unit and aldehyde group termini has been designed and constructed. Optical spectra show that, from the solution to the solid state, the absorption and fluorescence spectra of the compounds are red-shifted. Moreover, a red-shift of the absorbance maxima and the emission maxima of the compounds were observed due to the electron-accepting groups. Blue light-emitting properties with purity color range at 412–468 nm were also obtained. Thus, the target compound is expected to be a promising pure blue light-emitting material for applications in organic light-emitting diodes (OLEDs).

TOWARD EFFICIENT ELECTRON-TRANSPORTING AND BLUE-EMITTING MATERIALS FOR ORGANIC LIGHT-EMITTING DIODES: STRUCTURE AND PHOTOLUMINESCENT PROPERTIES OF SILOLE DERIVATIVES

2005 ◽  
Vol 14 (04) ◽  
pp. 487-495 ◽  
Author(s):  
YOUNGJIN KANG ◽  
JUNGCHEOL PARK ◽  
JUN HEO ◽  
KI-MIN PARK ◽  
JUN-HWAN AHN ◽  
...  
Keyword(s):  
Reduction Potential ◽  
Energy Levels ◽  
Coupling Reaction ◽  
Organic Light Emitting Diodes ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
Cyclic Voltametry ◽  
Organic Light ◽  
Cross Coupling Reaction

The potential blue-emitting as well as electron-transporting materials, 2,5-bis(3,5-trifluoromethylphenyl)-1,1-dimethyl-3,4-diphenylsilole (silole = silacyclopentadiene) (1) and 2,5-bis(3,5-trifluoromethylphenyl)-1,1-diphenyl-3,4-diphenylsilole (2), were synthesized by the Pd-mediated cross coupling reaction of corresponding bis(pheny-lethynyl)silanes with 1-bromo-3,5-trifluoromethylbenzene via intramolecular reductive cyclization. The structure of 2 was established by single-crystal X-ray diffraction analysis. In crystal structure, the dihedral angle between the functionalized phenyl groups containing CF3 at 2,5-position and central silole ring is about 48.70(6)°, showing the diminution of effective conjugation. These compounds exhibited high thermal stability without degradation up to 200°C. The absorption and photoluminescent properties, and cyclic voltametry have been evaluated. Compounds 1 and 2 in thin films showed intense blue emissions at 464–473 nm, respectively, in photoluminescence (PL). In electrochemistry, the reduction potential of 1 and 2 were at -1.92 and -1.81 V, respectively. The presence of substituents at 2,5′ — and/or 1,1′ — positions of siloe ring affected the LUMO energy levels through σ*–π* conjugation.

Synthesis and Optical Properties of Donor-Accepter Organic Conjugated Molecules Composed of Fluorene and Phenothiazine

2014 ◽  
Vol 1061-1062 ◽  
pp. 296-300
Author(s):  
Ze Biao Tang ◽  
Xiao Xia Sun ◽  
Pei Lin Zhang
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectra ◽  
Organic Molecules ◽  
Green Light ◽  
Organic Light Emitting Diodes ◽  
Conjugated Molecules ◽  
Strong Emission ◽  
Light Emitting ◽  
Conjugated Organic Molecules ◽  
Donor Acceptor

Novel donor-acceptor conjugated organic molecules composed of central fluorene and phenothiazine units and aldehyde terminal groups have been designed and constructed via the Vilsmeier-Haack reaction. Optical properties of the resulting molecules were examined by UV-vis and fluorescence spectroscopies. The fluorescence spectra of the molecules in the solid state show strong emission peaks in the violet, blue, cyan and green light regions. Thus, the molecules are expected to be promising light-emitting materials for organic light-emitting diodes applications.

scholarly journals Highly Isotactic Poly(N-butenyl-carbazole): Synthesis, Characterization, and Optical Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Antonio Botta ◽  
Vincenzo Venditto ◽  
Alfredo Rubino ◽  
Stefania Pragliola
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectra ◽  
Light Emission ◽  
Organic Light Emitting Diodes ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
Organic Light ◽  
Optical Applications ◽  
Carbazole Group

The synthesis of isotactic poly(N-butenyl-carbazole) (i-PBK) by using homogeneous isospecific Ziegler-Natta catalytic system is reported. The achieved polymer is crystalline and shows, to DSC and X-ray analysis, two distinct crystalline phases.i-PBK FTIR spectrum and X-ray diffraction pattern are compared with those of poly(N-vinylcarbazole) (PVK). The observed differences are tentatively associated with higher flexibility of thei-PBK chains due to the alkylene group connecting the carbazole group to the main chain.i-PBK optical properties are also compared with those of PVK and isotactic poly(N-pentenyl-carbazole) (i-PPK), a higher homologue ofi-PBK recently used as emitting layer in organic light emitting diodes (OLEDs) showing white light emission. The close similarity of the fluorescence spectra ofi-PBK andi-PPK is a promising basis for optical applications of this polymer.

A Perylene-Triazine-Based Star-Shaped Green Light Emitter for Organic Light Emitting Diodes

2018 ◽  
Vol 2018 (13) ◽  
pp. 1608-1613 ◽  
Author(s):  
Ravindra Kumar Gupta ◽  
Hidayath Ulla ◽  
M. N. Satyanarayan ◽  
Achalkumar Ammathnadu Sudhakar
Keyword(s):  
Light Emitting Diodes ◽  
Green Light ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitter ◽  
Organic Light
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