Luminescent carbon quantum dots with high quantum yield as a single white converter for white light emitting diodes

2015 ◽  
Vol 107 (21) ◽  
pp. 213102 ◽  
Author(s):  
X. T. Feng ◽  
F. Zhang ◽  
Y. L. Wang ◽  
Y. Zhang ◽  
Y. Z. Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
High Quantum Yield ◽  
Light Emitting ◽  
High Quantum ◽  
White Light Emitting Diodes

High quantum-yield CdSexS1−x/ZnS core/shell quantum dots for warm white light-emitting diodes with good color rendering

2013 ◽  
Vol 24 (28) ◽  
pp. 285201 ◽  
Author(s):  
Hongyan Duan ◽  
Yang Jiang ◽  
Yugang Zhang ◽  
Dapeng Sun ◽  
Chao Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
White Light ◽  
Light Emitting Diodes ◽  
Core Shell ◽  
High Quantum Yield ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Color Rendering

53% Efficient Red Emissive Carbon Quantum Dots for High Color Rendering and Stable Warm White‐Light‐Emitting Diodes

2017 ◽  
Vol 29 (37) ◽  
pp. 1702910 ◽  
Author(s):  
Zifei Wang ◽  
Fanglong Yuan ◽  
Xiaohong Li ◽  
Yunchao Li ◽  
Haizheng Zhong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Light Emitting ◽  
Warm White Light ◽  
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.

Recent advances in white light-emitting diodes of carbon quantum dots

Nanoscale ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 4826-4832 ◽  
Author(s):  
Ping He ◽  
Yuxin Shi ◽  
Ting Meng ◽  
Ting Yuan ◽  
Yunchao Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Single Component ◽  
Light Emitting ◽  
Recent Advances ◽  
White Light Emitting Diodes

In this mini review, we update the latest research in the design of high-performance WLEDs with different correlated color temperatures by tuning the red component using red emissive CQDs and single-component white emissive CQDs.

Multicolor tunable highly luminescent carbon dots for remote force measurement and white light emitting diodes

2019 ◽  
Vol 55 (81) ◽  
pp. 12164-12167 ◽  
Author(s):  
Ya Liu ◽  
Miaoran Zhang ◽  
Yanfen Wu ◽  
Rui Zhang ◽  
Yi Cao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
White Light ◽  
Carbon Dots ◽  
Light Emitting Diodes ◽  
Solvothermal Method ◽  
Force Measurement ◽  
High Quantum Yield ◽  
Light Emitting ◽  
One Step ◽  
White Light Emitting Diodes

A one-step solvothermal method was exploited to synthesize blue, yellow and red carbon dots with high quantum yield by altering the corresponding reaction solvent.

Stable and efficient hybrid Ag-In-S/ZnS@SiO2-carbon quantum dots nanocomposites for white light-emitting diodes

2020 ◽  
Vol 393 ◽  
pp. 124654 ◽  
Author(s):  
Hao Lin ◽  
Jie Yang ◽  
Yong-feng Liu ◽  
Fan-ju Zeng ◽  
Xiao-Sheng Tang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Light Emitting ◽  
White Light Emitting Diodes

scholarly journals Electroluminescent Warm White Light‐Emitting Diodes Based on Passivation Enabled Bright Red Bandgap Emission Carbon Quantum Dots

2019 ◽  
Vol 6 (13) ◽  
pp. 1900397 ◽  
Author(s):  
Haoran Jia ◽  
Zhibin Wang ◽  
Ting Yuan ◽  
Fanglong Yuan ◽  
Xiaohong Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Carbon Quantum Dots ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes

Efficient and long-lifetime full-color light-emitting diodes using high luminescence quantum yield thick-shell quantum dots

Nanoscale ◽  
2017 ◽  
Vol 9 (36) ◽  
pp. 13583-13591 ◽  
Author(s):  
Huaibin Shen ◽  
Qingli Lin ◽  
Weiran Cao ◽  
Chenchen Yang ◽  
Nathan T. Shewmon ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Light Emitting Diodes ◽  
Luminescence Quantum Yield ◽  
Thick Shell ◽  
High Quantum Yield ◽  
Light Emitting ◽  
High Quantum ◽  
Full Color ◽  
Long Lifetime

Peak external quantum efficiencies (EQEs) of 10.2%, 15.4%, and 15.6% were achieved for red, green, and blue QLEDs, respectively, by using high quantum yield thick-shell QDs.

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