A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence

Valsange, Nitin G.; Wong, Fu-Lung; Shinde, Durgaprasad; Lee, Chun‐Sing; Roy, Vellaisamy A. L.; Manzhos, Sergei; Feron, Krishna; Chang, Samuel; Katoh, Ryuzi; Sonar, Prashant; Wadgaonkar, Prakash P.

doi:10.1039/c7nj01921a

Cited by 9 publications

(2 citation statements)

References 56 publications

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“…The PE reported was 0.17 lm • W −1 , with 0.41 cd/A current efficiency and 202 cd/m 2 maximum brightness. 47 Bishnoi et al reported novel non-planar phenothiazine-5-oxides based on the donor, acceptor, and spacer concept compounds 2a-I (Figure 21). The synthesized compounds showed blue and blue-green emission in solution and in the solid state.…”

Section: Progress Of Blue Light Emitters In Indiamentioning

confidence: 99%

A Review on the Milestones of Blue Light-Emitting Materials in India

et al. 2023

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Since 1987 in the field of optoelectronics, organic light-emitting diodes (OLEDs) have secured their position because of their extreme use in panels of lighting applications such as TV and smartphone displays. At present, OLEDs are at top-notch position in the lighting market for their promising features. The field of OLEDs is rapidly growing day by day in academia and industry due to the success of OLEDs in the form of excellent efficiency, feasible methods, excellent lifetime, color purity, and superb device architecture. As a result, OLEDs are new profitable leading devices of the 21st century. However, the OLED industry has evolved in optoelectronics in the last 30 years and is advancing rapidly just because of the development in OLED materials (fluorescent, phosphorescent, thermally activated delayed fluorescent, and blue light-emitting materials). Blue light-emitting materials have achieved incredible popularity nationally and internationally. At the international level, USA, Japan, Korea, and Germany are at the top of the list in the production of OLEDs. India has also seen rapid progress in OLED development in the last 12 years and details of research in blue OLEDs by key players of India are involved in this report.1 Introduction1.1 OLED Construction1.2 Working of OLED2 OLED Development2.1 Historical Background of OLED2.1.1 International Status2.1.2 National Status3 Progress of Blue Emitters in India4 Present Scenario of Blue OLEDs5 Conclusions and Outlook

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Section: Progress Of Blue Light Emitters In Indiamentioning

confidence: 99%

A Review on the Milestones of Blue Light-Emitting Materials in India

et al. 2023

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“…The components of the chosen dyad (carbazole derivative and pyrene) were selected because they play a pivotal role in many areas of photophysics and optoelectronics. − These popular polycyclic aromatic hydrocarbons and their various derivatives (including silicon-based carbazole ,− and pyrene-containing compounds − ) have found application in optoelectronics, solar cells, TADF and organic light-emitting diode (OLED) materials, or fluorescent probes for elucidation of the geometries of various biomolecules. , There are also interesting studies that report white-light emission from pyrene-based compounds, − and many of them are related to aggregation-induced emission. Furthermore, there are known examples of carbazole–pyrene hybrid compounds for dye-sensitized solar cell applications, OLEDs, − and electroluminescent devices …”

Section: Introductionmentioning

confidence: 99%

White Light from Dual Intramolecular Charge-Transfer Emission in a Silylene-Bridged Styrylcarbazole and Pyrene Dyad

et al. 2021

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Styrylcarbazole linked to pyrene by a dimethylsilyl bridge was synthesized in the search for new charge-transfer active materials for LED applications. In the course of a photophysical study, it turned out that such a donor-bridge-acceptor compound displayed three completely different types of emission depending on solvent polarity. The most attractive emission properties were found in acetonitrile in which two broad emission bands were observed. The resolved mechanism of the excited-state processes in acetonitrile was supported by singular value decomposition with self-modeling treatment of time-resolved emission spectra (ns-TCSPC). The data analysis revealed that there were two excited-state processes, that is, charge transfer within styrylcarbazole and electron transfer from styrylcarbazole to pyrene through a silylene bridge that was responsible for a broad dual emission. The general idea of designing compounds that display emission from more than one excited state covering a wide range of the visible spectrum can be a powerful tool in designing new white-light-emitting materials.

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Near UV/Deep‐Blue Phenanthroimidazole‐Based Luminophores for Organic Light‐Emitting Diodes: Experimental and Theoretical Investigation

et al. 2019

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Two new deep blue phenanthroimidazole base luminophores 2-(4-(4-(4-(1-phenyl-1H-phenanthro[9,10-d]imidazol-2-yl) phenoxy)butoxy)phenyl)-1-phenyl-1H-phenanthro[9,10-d]imid -azole (DPIPOBn) and 2-(4-(4-(4-(1-(4-tert-butylphenyl)-1Hphenanthro[9,10-d]imidazol-2-yl) phenoxy)butoxy)phenyl)-1-(4tert-butylphenyl)-1H-phenanthro[9,10-d]imidazole (DPITBOBn) were designed and synthesized by linkage two phenanthroimidazole functional units via the highly flexible alkyl (butane) spacer with different N1 functional groups (benzene and tertbutylbenzene). The synthesized luminophores were structurally characterized by spectroscopic method ( 1 H, 13 C, and mass). The photophysical, electrochemical and electroluminescence properties of the luminophores were systematically studied. These luminophores emit intense blue PL emission in both solution and solid phase. The HOMO-LUMO energy level of the luminophores was calculated from Cyclic Voltammetry (CV) analysis and which agreed with the results from the densityfunctional-theory (DFT) calculation. The time-dependent DFT (TD-DFT) calculation was performed to know the excited states (singlet and triplet) of the luminophores. The solutionprocessed OLED was fabricated to test these materials as emissive materials and as emitters. All the doped devices exhibited near-UV emission with EL peaks centered around 380-395 nm with Commission International deL'Eclairage (CIE) coordinate of (0.16, 0.09 or 0.10). Among all the doped devices, DPITBOBn (3 wt%) based device displayed a power efficiency (PE) of 0.5 lm/W, a current efficiency (CE) of 1.2 cd/A and external quantum efficiency (EQE) of 1.9% at the brightness 100 cd/m 2 .[a] J. Tagare, Prof. S. Vaidyanathan

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A new pyrene cored small organic molecule with a flexible alkyl spacer: a potential solution processable blue emitter with bright photoluminescence

Cited by 9 publications

References 56 publications

A Review on the Milestones of Blue Light-Emitting Materials in India

A Review on the Milestones of Blue Light-Emitting Materials in India

White Light from Dual Intramolecular Charge-Transfer Emission in a Silylene-Bridged Styrylcarbazole and Pyrene Dyad

Near UV/Deep‐Blue Phenanthroimidazole‐Based Luminophores for Organic Light‐Emitting Diodes: Experimental and Theoretical Investigation

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