New blue emitting indenopyrazine derivatives for OLEDs: Improving the EL properties through substitution effects by using terphenyl side group

Park, Yong Il; Seok, Chang-Hun; Lee, Ji‐Hoon; Park, Jong‐Wook

doi:10.1016/j.synthmet.2010.01.031

Cited by 16 publications

(3 citation statements)

References 14 publications

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“…[1] Quinoline and its derivatives are π-conjugated semiconductor materials with a unique combination of high thermal stability, easy processing, and high photoluminescence (PL) quantum yield. [2] Quinoline derivatives offer the promise of wide spread adoption in numerous areas of technology including the organic light emitting diode (OLED), [3] information storage, [4] non-linear optical material, [4] and optoelectronic devices. [5] Many polyquinolines were developed and their optical and spectroscopic properties were investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films

et al. 2016

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The AC electrical conductivity and dielectrical properties of 2-amino-6-ethyl-5-oxo-4-(3-phenoxyphenyl)-5,6dihydro-4H-pyrano[3, 2-c]quinoline-3-carbonitrile (Ph-HPQ) and 2-amino-4-(2-chlorophenyl)-6-ethyl-5-oxo-5,6-dihydro-4H-pyrano [3, 2-c] quinoline-3-carbonitrile (Ch-HPQ) thin films were determined in the frequency range of 0.5 kHz-5 MHz and the temperature range of 290-443 K. The AC electrical conduction of both compounds in thin film form is governed by the correlated barrier hopping (CBH) mechanism. Some parameters such as the barrier height, the maximum barrier height, the density of charges, and the hopping distance were determined as functions of temperature and frequency. The phenoxyphenyl group has a greater influence on those parameters than the chlorophenyl group. The AC activation energies were determined at different frequencies and temperatures. The dielectric behaviors of Ph-HPQ and Ch-HPQ were investigated using the impedance spectroscopy technique. The impedance data are presented in Nyquist diagrams for different temperatures. The Ch-HPQ films have higher impedance than the Ph-HPQ films. The real dielectric constant and dielectric loss show a remarkable dependence on the frequency and temperature. The Ph-HPQ has higher dielectric constants than the Ch-HPQ.

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Section: Introductionmentioning

confidence: 99%

Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films

et al. 2016

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“…Critical issues for the application of both low molecular material such as anthracene derivatives and polymer are the thermal stability and lifetime of OLED devices. In addition to this, self‐heating due to power dissipation by the devices is a problem .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of diphenyl quinoline and bromine‐activated diphenyl quinoline organic phosphors

Pimpalshende

Dhoble

2013

Luminescence

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A diphenyl quinoline (DPQ)-conjugated derivative and bromine-activated DPQ (Br-DPQ) were synthesized in an inert gas atmosphere at 140 °C using Friedlander condensation. The compounds showed blue emission under a UV source. The structures were characterized by X-ray diffraction and Fourier transform infrared spectroscopy. The photoluminescence properties of the compounds were analysed using excitation and emission spectra. The synthesized organic phosphors shows bright emission in the blue region, with peaks at 445 and 453 nm, respectively, for DPQ and Br-DPQ in the powder form. The physical and photoluminescence properties of these organic compounds reveal promising blue emitters for high-efficiency organic light-emitting diodes.

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“…were used for fabricating blue OLEDs. However, blue emitting material accompanies serious problems of lower efficiency and shorter lifetime compared to red or green emitting material due to difficulty in hole and electron injection with larger band gap [12]. Full-color displays incorporating high efficient white organic light emitting diodes with color filters can circumvent issues of highresolution shadow masking for fine patterning the organic thin films, making it more feasible for fabrication of largearea OLED displays [13].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence studies of trichloro-DPQ organic phosphor

Raut¹,

Dhoble²,

Atram³

2011

Adv. Mater. Lett.

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A new blue emitting material containing quinoline is designed, synthesized and characterized. The material has been prepared by well-known reaction such as Friedlander condensation reaction at 140 °C. The blended thin films of Trichloro-DPQ with poly (methyl methacrylate) (PMMA) at different weight % concentrations such as 10, 5, 1 and 0.1 weight % have been prepared. The structural characterization has been done by FTIR spectra. The synthesized polymeric compound demonstrates emission in blue region at 460 nm in powder form. At different weight % concentrations, there is emission at 444 nm with varying intensity. The light emitting and optoelectronic property of polymeric compound may find application in electroluminescence, OLED and sensors.

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New blue emitting indenopyrazine derivatives for OLEDs: Improving the EL properties through substitution effects by using terphenyl side group

Cited by 16 publications

References 14 publications

Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films

Effect of substitution group on dielectric properties of 4H-pyrano [3, 2-c] quinoline derivatives thin films

Synthesis and characterization of diphenyl quinoline and bromine‐activated diphenyl quinoline organic phosphors

Photoluminescence studies of trichloro-DPQ organic phosphor

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