Achieving 46% efficient white-light emissive carbon dot-based material by enhancing phosphorescence for single-component white-light-emitting diodes

2021 ◽  
Author(s):  
Qijun Li ◽  
Yuchen Li ◽  
Shuai Meng ◽  
Jian Yang ◽  
Yukun Qin ◽  
...  
Keyword(s):  
White Light ◽  
Carbon Dots ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Emission Feature ◽  
Single Component ◽  
Dual Emission ◽  
Carbon Dot ◽  
Light Emitting ◽  
White Light Emitting Diodes

White-light-emitting carbon dots (CDs) with fluorescence/phosphorescence dual-emission feature is great importance for single-phase white-light-emitting diodes (WLEDs), but so far rather limited due to weak phosphorescence. Herein, a highly efficient white-light...

A single-phase heteroatom doped carbon dot phosphor toward white light-emitting diodes

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 38761-38768 ◽  
Author(s):  
Y. L. Wang ◽  
Y. Q. Zhao ◽  
Y. Zhang ◽  
F. Zhang ◽  
X. T. Feng ◽  
...  
Keyword(s):  
Citric Acid ◽  
White Light ◽  
Carbon Dots ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Citric Acid Monohydrate ◽  
Carbon Dot ◽  
Light Emitting ◽  
Doped Carbon Dots ◽  
White Light Emitting Diodes

Single-phase heteroatom doped carbon dots were prepared using citric acid monohydrate and ethylenediamine toward white light-emitting diodes.

Sonochemical Synthesis of Carbon Dots/Lanthanoid MOFs Hybrids for White Light-Emitting Diodes with High Color Rendering

2019 ◽  
Vol 11 (47) ◽  
pp. 44421-44429 ◽  
Author(s):  
Jintana Othong ◽  
Jaursup Boonmak ◽  
Vinich Promarak ◽  
Filip Kielar ◽  
Sujittra Youngme
Keyword(s):  
White Light ◽  
Carbon Dots ◽  
Light Emitting Diodes ◽  
Sonochemical Synthesis ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Color Rendering

scholarly journals Solvent regulation synthesis of single-component white emission carbon quantum dots for white light-emitting diodes

2021 ◽  
Vol 10 (1) ◽  
pp. 465-477
Author(s):  
Longshi Rao ◽  
Qing Zhang ◽  
Mingfu Wen ◽  
Zhongfa Mao ◽  
Huaxian Wei ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Single Component ◽  
Great Promise ◽  
Solvent Engineering ◽  
Light Emitting ◽  
White Emission ◽  
White Light Emitting Diodes

Abstract White light-emitting diodes (WLEDs) hold great promise in lighting, display, and visible light communication devices, and single-component white emission carbon quantum dots (SCWE-CQDs) as the key component of WLEDs have many outstanding advantages. However, rapid and efficient synthesis of SCWE-CQDs with high photoluminescence quantum yield (PLQY) and stability remains challenging. Here, we report a novel solvent engineering strategy to obtain highly photoluminescent SCWE-CQDs by controlling the dilution ratios between N,N-dimethylformamide (DMF) and pristine red carbon quantum dots (RCQDs) solution. By optimizing synthesis conditions, the relative PLQY of the SCWE-CQDs solution reached 53%. Morphological, structural, and optical property characterizations indicate that the combined action of the hydrogen bond (HB) effect and the size effect leads to the blue shift of RCQDs, but the HB effect is more dominant than the particle size in causing large spectral shifts. In addition, the WLEDs with high color rendering index of 89 and remarkable reliability were obtained based on the highly photoluminescent SCWE-CQDs. This facile solvent engineering approach for synthesizing tunable emission CQDs will promote the progress of carbon-based luminescent materials for applications in optoelectronic devices.

Novel ultrabright luminescent copper nanoclusters and application in light-emitting devices

2021 ◽  
Vol 57 (77) ◽  
pp. 9890-9893
Author(s):  
Qiu-Qin Huang ◽  
Mei-Yue Hu ◽  
Yan-Li Li ◽  
Nan-Nan Chen ◽  
Yi Li ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Single Component ◽  
Copper Nanoclusters ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Phosphorescence Emission ◽  
White Light Emitting Diodes

Ultra-small tri/tetra-nuclear copper nanoclusters (Cu3/Cu4) exhibit ultrabright phosphorescence emission (Фem = 71.8 and 63.5%). Cu3 is firstly applied as a single component phosphor for white light-emitting diodes with favourable characteristics.

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