Tag: M.W:600-700

Product Details of 435294-03-4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III), is researched, Molecular C35H27N2O2Ir, CAS is 435294-03-4, about Efficiency and color-temperature-stability improvements in exciplex-based phosphorescent organic light-emitting diodes with a quantum well structure.

Currently, exciplex has drawn a great deal of attention due to its potential for efficient electroluminescence and for use as a host. In this study, we used 4,4′,4″”-Tris(carbazol-9-yl) triphenylamine (TCTA) and 1,3,5-Tri(m-pyridin-3-ylphenyl) benze nee (TmPyPB) to form an exciplex host, where Bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III)(FIrpic) was used as the dopant to emit blue phosphorescent light. Addnl. FIrpic and Bis(1phenylisoquinoline) (acetylacetonate) iridium(III) emission layers were inserted in the proposed structure to investigate how the recombination area of carriers shifts with the increase of voltage. TCTA and non-doped FIrpic layers were then inserted in both sides of the emission layer to confine the carriers, and the thickness of the emission layer was also optimized to improve the current efficiency of the proposed devices. The efficiency of the devices was increased from 56 cd/A to 63.6 cd/A with the addnl. quantum well structure and an emission layer thickness of 15 nm. The current efficiency reported in this paper was fairly high as compared with other published data on blue-emission exciplex-based organic light-emitting diodes. In addition, the device with the quantum well structure exhibited purer blue-light emission, and the color temperature stability was also highly improved.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III)( cas:435294-03-4 ) is researched.Name: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III).Jou, Jwo-Huei; Lin, You-Ting; Su, Yu-Ting; Song, Wei-Chi; Kumar, Shiv; Dubey, Deepak Kumar; Shyue, Jing-Jong; Chang, Hsun-Yun; You, Yun-Wen; Liang, Tzu-Wei published the article 《Plausible degradation mechanisms in organic light-emitting diodes》 about this compound( cas:435294-03-4 ) in Organic Electronics. Keywords: organic light emitting diode degradation thickness. Let’s learn more about this compound (cas:435294-03-4).

Organic light emitting diode has become a highly attractive technol. for high quality displays and lighting. These applications, however, strongly rely on their lifetime. Probing all the possible failure mechanisms has hence become crucial. We reveal here that the device lifespan depends on the dielec. strength, internal elec. field, morphol., thermal stability, and migration of the composing organic and inorganic materials as well as span of recombination zone and device efficiency. Addnl., the lifetime is highly sensitive to the thickness of electron transporting layer. By taking a green emitter doped in 4,4-bis(carbazol-9-yl)biphenyl host for example, the device lifetime can be increased from 51 to 209 h at 1000 cd/m2, an increment of 310%, and its efficacy increased from 21 to 41 lm/W, an increment of 96%, as the thickness is increased from 20 to 40 nm. The results show high device reliability to be achievable provided it composes materials with high dielec. strength, high glass transition property and low migration tendency, and uniform layered structure with low built-in internal elec. field, wide recombination zone and high efficiency.

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Thiazole | C3H3NS – PubChem,
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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Rational Molecular Design of Azaacene-Based Narrowband Green-Emitting Fluorophores: Modulation of Spectral Bandwidth and Vibronic Transitions, published in 2021-06-09, which mentions a compound: 435294-03-4, mainly applied to rational mol design Azaacene narrowband green emitting fluorophores modulation; OLEDs; azaacene; narrow bandwidth; organic fluorophores; vibronic transition, Application of 435294-03-4.

A series of green-emitting fluorophores based on a tetra-azaacene core is synthesized by introducing nitrile substituents at different positions. Their mol. structure-optical property relationship [i.e., vibronic transitions in photoluminescence (PL) and electroluminescence (EL) spectra] is investigated to obtain a sharp emission where the vibronic peak ν0-0 should be intensified by suppressing ν0-n (n = 1, 2, 3…) transitions. The intensity ratios (I0-1/I0-0) of the ν0-1 and ν0-0 vibronic transitions in the PL spectra of DBBNP, DBBNP2CN1, and DBBNP2CN2 in hexane are 1.13, 0.80, and 0.67, resp. Theor. calculations explain that the CN substitution at positions 8 and 13 in DBBNP2CN2 induces a uniform charge distribution and reduces the Huang-Rhys factors (HRFs) of the vibrational normal modes coupled to the electronic transition. The organic light-emitting diode (OLED) fabricated with DBBNP2CN2 shows a narrower green EL emission at 518 nm with a smaller bandwidth (50 nm) than those of devices adopting DBBNP or DBBNP2CN1. The careful modification of the mol. structures and positions of substituents enables us to reduce the HRFs of vibrations to achieve a narrow emission bandwidth with decreased I0-1/I0-0, which suggests a design strategy to develop narrowband organic fluorophores to improve the color purity for wide-gamut OLED displays.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Category: thiazole. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III), is researched, Molecular C35H27N2O2Ir, CAS is 435294-03-4, about Imidazolyl-Phenylcarbazole-Based Host Materials and Their Use for Co-host Designs in Phosphorescent OLEDs. Author is Yi, Rong-Huei; Lei, Ya-Chun; Tseng, Yeh-Hsiang; Lin, Yi-Fan; Cheng, Yen-Chia; Fang, Yu-Chuan; Ho, Cheng-Yung; Tsai, Wei-Wen; Chang, Chih-Hao; Lu, Chin-Wei.

In recent years, owing to the demand for high-efficiency phosphorescent organic light-emitting devices (PhOLEDs), many studies were conducted on the development of bipolar host materials. Imidazolyl-phenylcarbazole-based host materials, i. e., i.m.-CzP, i.m.-CzPCz, i.m.-CzPCMe3, and i.m.-OCzP, were synthesized to obtain high-efficiency green and red-emitting PhOLEDs. With i.m.-OCzP as the host, satisfactory peak efficiencies of 22.2 (77.0 cd A-1 and 93.1 lm W-1) and 14.1% (9.0 cd A-1 and 10.1 lm W-1) could be obtained, resp. To further improve the performance of the devices, an electron transport material, bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PyMPM) was selected to construct a co-hosted system. The efficiency of i.m.-OCzP combined with B3PyMPM forming co-hosts could also achieve high values of 23.0 (80.0 cd A-1 and 98.8 lm W-1) and 16.5% (10.2 cd A-1 and 13.4 lm W-1) for green and red PhOLEDs, resp. These results exhibited that the proposed bipolar hosts have great flexibility in adjusting the carrier balance of EML in OLEDs, demonstrating their ingenious design and high potential.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

COA of Formula: C35H27N2O2Ir. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III), is researched, Molecular C35H27N2O2Ir, CAS is 435294-03-4, about An Amorphous Spirobifluorene-Phosphine-Oxide Compound as the Balanced n-Type Host in Bright and Efficient Light-Emitting Electrochemical Cells with Improved Stability. Author is Tang, Shi; Larsen, Christian; Rafols-Ribe, Joan; Wang, Jia; Edman, Ludvig.

A rational host-guest concept design for the attainment of high efficiency at strong luminance from light-emitting electrochem. cells (LECs) by suppression of exciton-polaron quenching [Tang et al., Nature Communications 2017, 8, 1190] has been reported. However, a practical drawback with the presented host-guest LEC devices was that the operational stability is insufficient for many applications. Here, a systematic study is performed, revealing that a major culprit for the limited operational stability is that the employed n-type host, 1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7), has a strong propensity for crystallization and that this crystallization results in a detrimental phase separation of the constituents in the active material during device operation. The authors, therefore, identify an alternative class of concept-functional n-type hosts in the form of spirobifluorene-phosphine-oxide compounds, and report that the replacement of OXD-7 with amorphous 2,7-bis(diphenylphosphoryl)-9,9′-spirobifluorene results in a much improved operational lifetime of 700 h at >100 cd m-2 during constant-bias driving at an essentially retained high current efficacy of 37.9 cd A-1 and a strong luminance of 2940 cd m-2.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Application of 435294-03-4. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III), is researched, Molecular C35H27N2O2Ir, CAS is 435294-03-4, about Hybrid white quantum dot-organic light-emitting diodes with highly stable CIEx,y coordinates by the introduction of n-type modulation and multi-stacked hole transporting layer. Author is Lee, Hakjun; Song, Seung-Won; Hwang, Kyo Min; Kim, Ki Ju; Yang, Heesun; Kim, Young Kwan; Kim, Taekyung.

Extremely stable white emission out of a hybrid white quantum dot-organic light-emitting diode (WQD-OLED) was achieved by developing a novel concept of device architecture. The new inverted device structure employs a thermally-evaporated red phosphorescent emitting layer (EML) with an n-type modulation and a multi-stacked hole transporting layer (HTL) on the top of solution-processed ZnO nanoparticles for an electron transporting layer and blue and green QD-mixed EML. The multi-stacked HTL, tris(4-carbazoyl-9-ylphenyl)amine (TCTA)/1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), and the n-type modulation layer, 2,2′,2′′-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi) successfully balanced low-mobility holes with high-mobility electrons, and uniformly distributed the charges across the blue/green QD and red EMLs. In particular, the role of the n-type modulation layer was comprehensively analyzed with impedance spectroscopy and verified to minimize the undesired Auger recombination by excess charges and broaden the recombination zone. Consequently, highly stable white emission (0.32 ± 0.02, 0.31 ± 0.02) in CIExy color coordinates over 4 V operating voltage range (or two decades of c.d.), 3.92% external quantum efficiency, and 3.83 h device lifetime at 500 cd m-2 up to 50% of the initial luminance (LT50) were simultaneously obtained.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 435294-03-4, is researched, Molecular C35H27N2O2Ir, about Robust tetrakisarylsilyl substituted spirobifluorene: Synthesis and application as universal host for blue to red electrophosphorescence, the main research direction is tetrakisarylsilyl substituted spirobifluorene synthesis application blue red electrophosphorescence.Recommanded Product: 435294-03-4.

Stable hosts with high triplet energy levels are of great importance for achieving highly efficient phosphorescence organic light-emitting diodes (PhOLEDs). In this work, a simple and robust spirobifluorene derivative peripherally substituted with tetrakisarylsilyls was designed and synthesized. The spirobifluorene derivative exhibits high thermal/morphol. stabilities and ultra-violet blue emissions with moderate fluorescence quantum yields. DFT calculation indicates that the frontier MOs (FMOs) are mainly associated with the spirobifluorene segment and there is very limited distribution on the peripheral substituents. PhOLEDs using TPSiF as a universal host were fabricated and blue to red emissions were achieved with high efficiencies, among which the green device using Ir(ppy)2acac as guest showed high performance with maximum luminance, current efficiency, power efficiency and external quantum efficiency (EQE) of 11690 cd m-2, 77.2 cd A-1, 47.3 lm W-1, and 21.1%, resp. Notably, the blue devices show excellent efficiencies at high doping concentration and a 14.9% EQE was achieved at 30 wt % dopant with maximum luminance, current efficiency and power efficiency of 7782 cd m-2, 36.0 cd A-1 and 29.8 lm W-1, resp.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III)( cas:435294-03-4 ) is researched.Name: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III).Li, Huaping published the article 《Gate Tunable Organic Light Emitting Diodes: Principles and Prospects》 about this compound( cas:435294-03-4 ) in Chemical Record. Keywords: gated organic light emitting diodes composite electrodes; composite electrodes; electrolytes; gated organic light-emitting diodes; porous electrodes; work function tunable electrode. Let’s learn more about this compound (cas:435294-03-4).

This record summarizes our recent developments on gate-tunable organic light-emitting diodes (OLEDs). The key point is to modulate the charge carrier injection barrier by the applied gate potential. One way is to electrochem. dope charge carrier injection layer through porous electrodes. The electrochem. doped charge carrier layer thus form gate-tunable contact with porous electrodes. Another way is to modulate the work-function of electrodes that can have varied charge carrier injection barriers following the applied gate potential. Gate-tunable OLEDs based on these two working principles have been fabricated, characterized and demonstrated for displaying simple digitals and letters. New materials including dielec., porous electrodes, work function tunable electrodes, and charge carrier injection materials have been further explored for performance improvement.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III)(SMILESS: CC1=O[Ir+3]23([N]4=CC=C(C=CC=C5)C5=C4C6=CC=CC=[C-]36)(O=C(C)[CH-]1)[N]7=CC=C(C=CC=C8)C8=C7C9=CC=CC=[C-]29,cas:435294-03-4) is researched.Safety of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. The article 《Rational Molecular Design of Azaacene-Based Narrowband Green-Emitting Fluorophores: Modulation of Spectral Bandwidth and Vibronic Transitions》 in relation to this compound, is published in ACS Applied Materials & Interfaces. Let’s take a look at the latest research on this compound (cas:435294-03-4).

A series of green-emitting fluorophores based on a tetra-azaacene core is synthesized by introducing nitrile substituents at different positions. Their mol. structure-optical property relationship [i.e., vibronic transitions in photoluminescence (PL) and electroluminescence (EL) spectra] is investigated to obtain a sharp emission where the vibronic peak ν0-0 should be intensified by suppressing ν0-n (n = 1, 2, 3…) transitions. The intensity ratios (I0-1/I0-0) of the ν0-1 and ν0-0 vibronic transitions in the PL spectra of DBBNP, DBBNP2CN1, and DBBNP2CN2 in hexane are 1.13, 0.80, and 0.67, resp. Theor. calculations explain that the CN substitution at positions 8 and 13 in DBBNP2CN2 induces a uniform charge distribution and reduces the Huang-Rhys factors (HRFs) of the vibrational normal modes coupled to the electronic transition. The organic light-emitting diode (OLED) fabricated with DBBNP2CN2 shows a narrower green EL emission at 518 nm with a smaller bandwidth (50 nm) than those of devices adopting DBBNP or DBBNP2CN1. The careful modification of the mol. structures and positions of substituents enables us to reduce the HRFs of vibrations to achieve a narrow emission bandwidth with decreased I0-1/I0-0, which suggests a design strategy to develop narrowband organic fluorophores to improve the color purity for wide-gamut OLED displays.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Pyrene-based hyperbranched porous polymers with doped Ir(piq)2(acac) red emitter for highly efficient white polymer light-emitting diodes, published in 2020-01-31, which mentions a compound: 435294-03-4, Name is Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III), Molecular C35H27N2O2Ir, Safety of Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III).

Here, we designed and prepared a series of hyperbranched porous polymers constructed using fluorene branches and pyrene core, and all hyperbranched porous polymers exhibit intense blue fluorescence, good morphol. stability, and high thermal stability. Further, it is found that the aperture sizes for hyperbranched porous polymers can be adjusted by simply changing the content of pyrene and fluorene in the synthesis process. When the feed ratios of pyrene in the total polymers is 15 mol%, the optimized aperture size was obtained, which is slightly larger than the maxlength of complementary red emitter Bis(1-phenylisoquinoline)(acetylacetonate)iridium (III) (Ir(piq)2acac), indicating the Ir(piq)2acac can well distributed in the apertures of hyperbranched porous polymers in co-doped film of Ir(piq)2acac and hyperbranched porous polymers. The fabricated polymer-light-emitting diode (PLED) with such co-doped film as light-emitting layer realizes good white emission with almost equal blue and red emission intensity from hyperbranched porous polymers and Ir(piq)2acac. The balanced electroluminescent (EL) spectra contribute to ideal Commission Internationale de l’Eclairage (CIE) coordinate of (0.326, 0.374) located at white light zone. In addition, the device also achieves high device performance with maximum luminance and current efficiency reaching 5369 cd/m2 and 8.35 cd/A, resp. We believe that such porous-structure polymers have huge potential applications in the development of highly efficient white PLEDs with reducing production cost.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica