Facile fabrication of color-tunable and white light emitting nano-composite films based on layered rare-earth hydroxides

2015 ◽  
Vol 3 (10) ◽  
pp. 2326-2333 ◽  
Author(s):  
Liangliang Liu ◽  
Minghui Yu ◽  
Jian Zhang ◽  
Bingkai Wang ◽  
Weisheng Liu ◽  
...  
Keyword(s):  
Rare Earth ◽  
Composite Film ◽  
White Light ◽  
Light Emission ◽  
Composite Films ◽  
Nano Composite ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Color Tunable ◽  
Facile Fabrication

A new photoluminescent nano-composite film with color tunable and white-light emission based on organic–inorganic hybrid phosphors and polymethyl methacrylate has been fabricated facilely by taking full unique advantage of layered rare-earth hydroxides.

scholarly journals Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

2019 ◽  
Vol 10 ◽  
pp. 760-770 ◽  
Author(s):  
Jeff L Nyalosaso ◽  
Rachod Boonsin ◽  
Pierre Vialat ◽  
Damien Boyer ◽  
Geneviève Chadeyron ◽  
...  
Keyword(s):  
White Light ◽  
Fluorescent Dyes ◽  
Light Emission ◽  
Organic Dyes ◽  
Light Emitting Diode ◽  
Composite Films ◽  
Visible Spectrum ◽  
Light Emitting ◽  
Blue Led ◽  
Display Devices

A new luminescent composite film resulting from the dispersion of luminescent organic dyes in a single-layered hydroxide (SLH)-type inorganic matrix has been developed. Two fluorescent organic dyes emitting visible light upon blue LED excitation were investigated in this study: dicyanomethylene (DCM) and pyranine (HPTS). These dyes exhibit broad emission bands that cover a large part of the visible spectrum. The concept developed in our work consisted in keeping SLH in its wet form to ensure a good dispersion of the fluorescent dyes prior to immobilizing the hybrid materials in a silicone polymer to achieve luminescent composite films. We demonstrate that these coatings stacked upon each other and placed above a blue LED lead to white-light emission with suitable photometric parameters for applications in lighting or display devices: colour temperature of 5409 K and colour rendering index (CRI) of 81.

Direct white light emission from a rare-earth-free aluminium–boron–carbon–oxynitride phosphor

2014 ◽  
Vol 2 (21) ◽  
pp. 4297-4303 ◽  
Author(s):  
T. Ogi ◽  
H. Iwasaki ◽  
A. B. D. Nandiyanto ◽  
F. Iskandar ◽  
W.-N. Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Light Emission ◽  
Precursor Solution ◽  
White Light Emission ◽  
Phosphor Material ◽  
Light Emitting ◽  
Boron Carbon

A novel direct white light emitting phosphor material was prepared from rare-earth free precursor solution.

A color tunable and white light emitting Ca2Si5N8:Ce3+,Eu2+ phosphor via efficient energy transfer for near-UV white LEDs

2018 ◽  
Vol 47 (19) ◽  
pp. 6860-6867 ◽  
Author(s):  
Chao Li ◽  
Hongwei Zheng ◽  
Hengwei Wei ◽  
Shijie Qiu ◽  
Ling Xu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Single Phase ◽  
Light Emission ◽  
Efficient Energy Transfer ◽  
Light Emitting ◽  
White Leds ◽  
Efficient Energy ◽  
Challenging Issue ◽  
Color Tunable

Achieving tunable color and white light emission in a single phase phosphor is a challenging issue.

scholarly journals Rare Earth (RE) doped color tunable phosphors for white light emitting diodes

2021 ◽  
Vol 1913 (1) ◽  
pp. 012017
Author(s):  
Saniya Khan ◽  
Yatish R Parauha ◽  
Dharma K Halwar ◽  
Sanjay J Dhoble
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Tunable ◽  
White Light Emitting Diodes

Novel rare earth ions-doped oxyfluoride nano-composite with efficient upconversion white-light emission

2008 ◽  
Vol 181 (10) ◽  
pp. 2763-2767 ◽  
Author(s):  
Daqin Chen ◽  
Yuansheng Wang ◽  
Yunlong Yu ◽  
Ping Huang ◽  
Fangyi Weng
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Rare Earth Ions ◽  
Nano Composite

scholarly journals Stable blue-emissive aluminum acetylacetonate nanocrystals with high quantum yield of over 80% and embedded in polymer matrix for remote UV-pumped white light–emitting diodes

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1509-1518
Author(s):  
Hong Zheng ◽  
Bingkun Chen ◽  
Lifu Shi ◽  
Fa Zhang ◽  
Ziheng Zhao ◽  
...  
Keyword(s):  
Composite Film ◽  
White Light ◽  
Light Emitting Diodes ◽  
Composite Films ◽  
Blue Emission ◽  
Quantum Yields ◽  
Aluminum Compound ◽  
Light Emitting ◽  
Air Atmosphere ◽  
White Light Emitting Diodes

AbstractBlue-emissive nanocrystals (NCs) with high photoluminescence quantum yields (PL QYs) and excellent stability are essential for lighting and displays. Here, a facile top-down approach (including two steps: thermal annealing and ultrasonic treatment) by using aluminum acetylacetonate (Al(acac)3) as a precursor is adopted to fabricate blue-emissive Al(acac)3 NCs with high PL QY reaching 81.8%, the highest reported value for the aluminum compound-based NCs so far. Additionally, the as-fabricated Al(acac)3 NC solution (in toluene) exhibits high stability under air atmosphere condition, maintaining 61.2% of initial PL QY after 1 year. Furthermore, solution-processed Al(acac)3 NCs/poly(methyl methacrylate) (PMMA) composite film with blue emission is demonstrated. Finally, combinations of the blue-emitting Al(acac)3 NCs/PMMA composite film with red-emitting and green-emitting CuInS2 composite films are realized, resulting in remote ultraviolet-pumped white light-emitting diodes with a high color rendering index of 91. These findings inform new blue-emissive NCs and composite films, potentially paving the way to design new structures of lighting and display devices.

Pure white light emission from a rare earth-free intrinsic metal–organic framework and its application in a WLED

2018 ◽  
Vol 6 (3) ◽  
pp. 614-621 ◽  
Author(s):  
Tuhina Mondal ◽  
Supriya Mondal ◽  
Saptasree Bose ◽  
Debabrata Sengupta ◽  
Uttam Kumar Ghorai ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Rare Earth Metal ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Earth Metal ◽  
Light Emitting ◽  
Metal Free ◽  
Metal Organic

Designing of a white light emitting diode based on rare earth metal free intrinsic Zn-MOF by fabricating a suitable device.

Rare earth-free composites of carbon dots/metal–organic frameworks as white light emitting phosphors

2019 ◽  
Vol 7 (8) ◽  
pp. 2207-2211 ◽  
Author(s):  
Aiwu Wang ◽  
Yun-Long Hou ◽  
Fengwen Kang ◽  
Fucong Lyu ◽  
Yuan Xiong ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Carbon Dots ◽  
Light Emission ◽  
Rare Earth Metals ◽  
Metal Organic Frameworks ◽  
White Light Emission ◽  
Light Emitting ◽  
Metal Organic ◽  
New Type

Here we report a new type of white light-emission material that is free of rare earth metals, fabricated by conveniently compositing carbon dots (CDs) with Zr(iv)-based metal–organic frameworks (MOFs).

PMMA-copolymerized color tunable and pure white-light emitting Eu3+–Tb3+containing Ln-metallopolymers

2017 ◽  
Vol 5 (7) ◽  
pp. 1742-1750 ◽  
Author(s):  
Wei-Xu Feng ◽  
Shao-Yun Yin ◽  
Mei Pan ◽  
Hai-Ping Wang ◽  
Ya-Nan Fan ◽  
...  
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Light Emitting ◽  
Color Tunable ◽  
Pure White

Homo or hetero Ln-metallopolymers with tunable multicoloured and white light emission were fabricated by anchoring lanthanide coordination monomers onto PMMA backboneviapre-designed vinylbenzyl-substituted NTB-type ligand.

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