In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix and their application in flexible light-emitting diodes

Nanoscale ◽  
2019 ◽  
Vol 11 (35) ◽  
pp. 16499-16507 ◽  
Author(s):  
Peng Chen ◽  
Yufeng Liu ◽  
Zhijun Zhang ◽  
Yan Sun ◽  
Jingshan Hou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Mesoporous Silica ◽  
Chemical Stability ◽  
Light Emitting Diodes ◽  
Thermal Quenching ◽  
Silica Matrix ◽  
In Situ Growth ◽  
Light Emitting

In situ growth of ultrasmall cesium lead bromine quantum dots in a mesoporous silica matrix can efficiently depressed QDs' self-absorption, simultaneously improving their characteristics of thermal quenching, luminous decay and chemical stability.

In Situ Ligand Bonding Management of CsPbI 3 Perovskite Quantum Dots Enables High‐Performance Photovoltaics and Red Light‐Emitting Diodes

2020 ◽  
Vol 59 (49) ◽  
pp. 22230-22237 ◽  
Author(s):  
Junwei Shi ◽  
Fangchao Li ◽  
Yan Jin ◽  
Cheng Liu ◽  
Ben Cohen‐Kleinstein ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting ◽  
Perovskite Quantum Dots

Quantum Dots-Converted Light-Emitting Diodes Packaging for Lighting and Display: Status and Perspectives

2016 ◽  
Vol 138 (2) ◽  
Author(s):  
Bin Xie ◽  
Run Hu ◽  
Xiaobing Luo
Keyword(s):  
Quantum Dots ◽  
Polymer Matrix ◽  
Experimental Validation ◽  
Light Emitting Diodes ◽  
State Of The Art ◽  
Thermal Quenching ◽  
Surface Damage ◽  
Light Emitting ◽  
Color Rendering ◽  
Excellent Color

Recent years, semiconductor quantum dots (QDs) have attracted tremendous attentions for their unique characteristics for solid-state lighting (SSL) and thin-film display applications. The pure and tunable spectra of QDs make it possible to simultaneously achieve excellent color-rendering properties and high luminous efficiency (LE) when combining colloidal QDs with light-emitting diodes (LEDs). Due to its solution-based synthetic route, QDs are impractical for fabrication of LED. QDs have to be incorporated into polymer matrix, and the mixture is dispensed into the LED mold or placed onto the LED to fabricate the QD–LEDs, which is known as the packaging process. In this process, the compatibility of QDs' surface ligands with the polymer matrix should be ensured, otherwise the poor compatibility can lead to agglomeration or surface damage of QDs. Besides, combination of QDs–polymer with LED chip is a key step that converts part of blue light into other wavelengths (WLs) of light, so as to generate white light in the end. Since QD-LEDs consist of three or more kinds of QDs, the spectra distribution should be optimized to achieve a high color-rendering ability. This requires both theoretical spectra optimization and experimental validation. In addition, to prolong the reliability and lifetime of QD-LEDs, QDs have to be protected from oxygen and moisture penetration. And the heat generation inside the package should be well controlled because high temperature results in QDs' thermal quenching, consequently deteriorates QD-LEDs' performance greatly. Overall, QD-LEDs' packaging and applications present the above-mentioned technical challenges. A profound and comprehensive understanding of these problems enables the advancements of QD-LEDs' packaging processes and designs. In this review, we summarized the recent progress in the packaging of QD-LEDs. The wide applications of QD-LEDs in lighting and display were overviewed, followed by the challenges and the corresponding progresses for the QD-LEDs' packaging. This is a domain in which significant progress has been achieved in the last decade, and reporting on these advances will facilitate state-of-the-art QD-LEDs' packaging and application technologies.

Realization of wide circadian variability by quantum dots-luminescent mesoporous silica-based white light-emitting diodes

2017 ◽  
Vol 28 (42) ◽  
pp. 425204 ◽  
Author(s):  
Bin Xie ◽  
Jingjing Zhang ◽  
Wei Chen ◽  
Junjie Hao ◽  
Yanhua Cheng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Mesoporous Silica ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
White Light Emitting Diodes

Continuous In Situ Synthesis of ZnSe/ZnS Core/Shell Quantum Dots in a Microfluidic Reaction System and its Application for Light-Emitting Diodes

Small ◽  
2012 ◽  
Vol 8 (21) ◽  
pp. 3257-3262 ◽  
Author(s):  
Byoung-Hwa Kwon ◽  
Kyoung G. Lee ◽  
Tae Jung Park ◽  
Hyunki Kim ◽  
Tae Jae Lee ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Light Emitting Diodes ◽  
Reaction System ◽  
In Situ Synthesis ◽  
Core Shell ◽  
Light Emitting

Ampholytic interface induced in situ growth of CsPbBr3 for highly efficient perovskite light-emitting diodes

2021 ◽  
Author(s):  
Jianfeng Ou ◽  
Xiaoyang Guo ◽  
Li Song ◽  
Jie Lin ◽  
Ying Lv ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Nucleation And Growth ◽  
In Situ Growth ◽  
Light Emitting ◽  
Highly Efficient

An ethanolamine interface is adopted to induce in situ nucleation and growth of CsPbBr3 for highly efficient perovskite light-emitting diodes.

In Situ Ligand Bonding Management of CsPbI 3 Perovskite Quantum Dots Enables High‐Performance Photovoltaics and Red Light‐Emitting Diodes

2020 ◽  
Vol 132 (49) ◽  
pp. 22414-22421
Author(s):  
Junwei Shi ◽  
Fangchao Li ◽  
Yan Jin ◽  
Cheng Liu ◽  
Ben Cohen‐Kleinstein ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting ◽  
Perovskite Quantum Dots

Surface Organic Ligands-Passivated Quantum Dots: Toward High-Performance Light-Emitting Diodes with Long Lifetime

2021 ◽  
Author(s):  
Lishuang Wang ◽  
Ying Lv ◽  
Jie Lin ◽  
Jialong Zhao ◽  
Xingyuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Ligands ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Light Emitting ◽  
Long Lifetime

For quantum dots light-emitting diodes (QLEDs), typical colloidal quantum dots (QDs) are usually composed of a core/shell heterostructure which is covered with organic ligands as surface passivated materials to confine...

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