Organic white-light emitting materials

Mukherjee, Sanjoy; Thilagar, Pakkirisamy

doi:10.1016/j.dyepig.2014.05.031

Cited by 270 publications

(165 citation statements)

References 126 publications

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“…White organic light emitting devices and displays are the next generation energy saving light sources which could help to lower the energy crisis. Full color emissive materials have also attracted much attention as key components for OLED display devices with the high performance of red-greenblue light emitters with long life span materials [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Optoelectronic characterization of zinc complexes for display device applications

Nishal

Singh

Saini

et al. 2015

J Mater Sci: Mater Electron

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2-(2-Pyridyl)benzimidazolato)-2-methyl-8-hydroxyquinolinatozinc(II)[ZnPBI(Meq)], 2-(2-pyridyl)benzimidazolato)-5-chloro-8-hydroxyquinolinatozinc(II) [ZnPBI (Clq)] and 2-(2-pyridyl)benzimidazolato)-8-hydroxyquinolinatozinc(II) [ZnPBI(q)] were synthesized and characterized for the purpose to be used as electroluminescent materials. All complexes emitted bright colored light on excitation by ultraviolet light source which showed their suitability for the operation in opto-electronic devices. Using a selected complex [ZnPBI(Meq)] as emissive layer, multilayered organic electroluminescent device was fabricated having structure ITO/a-NPD/Zinc complex/BCP/Alq 3 /LiF/Al, that produced bright bluish green emission at 532 nm. Maximum luminescence observed was 4038 cd/m 2 at 18 V while the turn on voltage of the device was 7 V. The Commission Internationale d'Eclairage chromaticity of the device had color coordinates at x = 0.35, y = 0.44 and was found to be independent of the operating voltages. The [ZnPBI(Meq)] complex exhibited high thermal stability ([300°C) and high glass transition temperature ([150°C).

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Section: Introductionmentioning

confidence: 99%

Optoelectronic characterization of zinc complexes for display device applications

Nishal

Singh

Saini

et al. 2015

J Mater Sci: Mater Electron

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“…1,2 Amongst inorganic and organic materials there are different approaches being developed by researchers in order to achieve efficient white light emission. 2a,3 In the case of organic molecules traditional strategies for the design of white light emitters are based on (1) the mixing of several fluorophores emitting either blue, red and green or orange and turquoise light which when combined cover the entire visible spectrum or (2) the use of single molecule emitting white light.…”

Section: Introductionmentioning

confidence: 99%

White-light emission from discrete heterometallic lanthanide-directed self-assembled complexes in solution

et al. 2017

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Herein, we have developed a white-light-emitting system based on the formation of discrete lanthanide-based self-assembled complexes using a newly-designed ligand. We demonstrate that fine tuning of the lanthanide ions molar ratio in the self-assemblies combined with the intrinsic blue fluorescence of the ligand allows for the successful emission of pure white light with CIE coordinates of (0.33, 0.34).

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“…[1][2][3][4][5] Currently, practical white-light-emitting materials are mainly inorganic phosphors containing rareearth elements (REEs). [1][2][3][4][5] Currently, practical white-light-emitting materials are mainly inorganic phosphors containing rareearth elements (REEs).…”

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confidence: 99%

“…[5] Therefore, the development of low-cost REE-free luminescent materials with efficient, stable, and high-quality white-light emission is highly important. [2,4] GQDs are receiving extensive attention because of their superior properties, such as size-tunable emission, high chemical, and optical stability, as well as good biocompatibility. However, these materials still have many shortcomings in luminous efficiency, color, and stability.…”

mentioning

confidence: 99%

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White‐Light‐Emitting Melamine‐Formaldehyde Microspheres through Polymer‐Mediated Aggregation and Encapsulation of Graphene Quantum Dots

Zhang

Pan

et al. 2018

Advanced Science

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Graphene quantum dot (GQD) encapsulated melamine‐formaldehyde (MF) polymer microspheres with uniform particle size and tunable high‐quality white‐light emissions are prepared via a polymer‐mediated GQD assembly and encapsulation strategy. In solution, GQDs are first aggregated with MF prepolymer through electrostatic interaction and further encapsulated inside the microspheres formed by polymerization of MF prepolymer under acid catalysis and heating. During this process, the aggregated GQDs are fixed in the MF polymer matrix with their emission extended from blue to full visible range, presenting bright white luminescence under ultraviolet excitation. The prepared white‐light‐emitting GQD‐MF microspheres exhibit uniform morphology with an average particle size of 2.0 ± 0.08 µm and their luminescence properties are effectively regulated by the doping concentration of GQDs in the MF polymer matrix. A series of white‐light‐emitting GQD‐MF microspheres with quantum yields from 0.83 to 0.43, Commission Internationale de L'Eclairage coordinates from (0.28, 0.28) to (0.33, 0.32), and color rendering index from 0.75 to 0.88 are obtained with excellent photostability and thermal stability. By dispersing the GQD‐MF microspheres in cross‐linked polydimethylsiloxane matrix, flexible film with dual functions of high‐quality white‐light‐emitting and light diffusion is obtained and successfully applied for white light‐emitting diode fabrication.

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Organic white-light emitting materials

Cited by 270 publications

References 126 publications

Optoelectronic characterization of zinc complexes for display device applications

Optoelectronic characterization of zinc complexes for display device applications

White-light emission from discrete heterometallic lanthanide-directed self-assembled complexes in solution

White‐Light‐Emitting Melamine‐Formaldehyde Microspheres through Polymer‐Mediated Aggregation and Encapsulation of Graphene Quantum Dots

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