NIR-excited all-inorganic perovskite quantum dots (CsPbBr3) for a white light-emitting device

2019 ◽  
Vol 7 (13) ◽  
pp. 3751-3755 ◽  
Author(s):  
Jiao Ma ◽  
Hao Wu ◽  
Jianbei Qiu ◽  
Jing Wang ◽  
Qi Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Light Emitting ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots

All-inorganic CsPbX3 (X = Cl, Br, and I) perovskite quantum dots have great potential in the field of white light emission owing to their excellent optical properties.

A benzoperylene probe self-assembled on polyethyleneimine/manganese doped ZnS quantum dots: a new nanocomposite for bright and tunable white light emission

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 83110-83116 ◽  
Author(s):  
Lijia Sang ◽  
Meiding Yang ◽  
Huipeng Zhou ◽  
Xinan Huang ◽  
Cong Yu
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Light Emitting ◽  
Self Assembled ◽  
First Time

A white light emitting benzoperylene probe-polyethyleneimine capped quantum dots nanocomposite has been synthesized for the first time.

White light emission from CdTe quantum dots decorated n-ZnO nanorods/p-GaN light-emitting diodes

2011 ◽  
Vol 99 (6) ◽  
pp. 063112 ◽  
Author(s):  
J. Dai ◽  
Y. Ji ◽  
C. X. Xu ◽  
X. W. Sun ◽  
K. S. Leck ◽  
...  
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diodes ◽  
Light Emission ◽  
Zno Nanorods ◽  
White Light Emission ◽  
Cdte Quantum Dots ◽  
Light Emitting

scholarly journals Fabrication and Characterization of a Light-Emitting Device Based on the CdS/ZnS Spherical Quantum Dots

2021 ◽  
Author(s):  
Kobra Hasanirokh ◽  
Asghar Asgari ◽  
Saber Mohammadi
Keyword(s):  
Quantum Dots ◽  
Current Density ◽  
White Light ◽  
Light Emission ◽  
Blue Emission ◽  
Critical Factor ◽  
White Light Emission ◽  
Device Structure ◽  
Light Emitting ◽  
Particle Layer

Abstract In this work, we focus on the colloidal quantum dot based light-emitting diodes (QD-LEDs) performance. First, we synthesize the spherical QDs with a CdS core that covered with a wider band gap II–VI semiconductor acting as a shell (ZnS). In order to synthesize this nano crystal QDs with structure of CdS/ZnS/CdS/ZnS, we use a reverse micelle process. These four-layer quantum well quantum dots (QWQDs) can generate the white light emission. The positional design of different layers i.e., core/shell QD emitters is a critical factor for white emissive devices. The blue emission generated by CdS core mixes with green/orange components originating from ZnS inner shell and creates an efficiency white light emission. Then, we fabricate a white-QDLED with a device structure of ITO/ ZnO / QD / CBP/ MoO 3 / Al films. A thin film of CdS/ZnS/CdS/ZnS QDs is deposited by electrostatically assembled colloidal QD solutions. The experimental results show that the emission spectra of QDs and current density through the LED are controlled by varying the particle sizes. The peaks of absorbance and Photoluminescence (PL) spectrums get the red shifted as the dot size increases. Furthermore, this QD-LED with a smaller nano particle layer has a higher current density.

scholarly journals Fabrication of a light-emitting device based on the CdS/ZnS spherical quantum dots

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Kobra Hasanirokh ◽  
Asghar Asgari ◽  
Saber Mohammadi
Keyword(s):  
Quantum Dots ◽  
Current Density ◽  
White Light ◽  
Light Emission ◽  
Blue Emission ◽  
White Light Emission ◽  
Core Shell ◽  
Device Structure ◽  
Light Emitting ◽  
Particle Layer

AbstractIn this work, we focus on the colloidal quantum dot based light-emitting diodes (QD-LEDs) performance. First, we synthesize the spherical QDs with a CdS core that covered with a wider band gap II–VI semiconductor acting as a shell (ZnS). In order to synthesize this nano crystal QDs with structure of CdS/ZnS/CdS/ZnS, we use a reverse micelle process. These four-layer quantum well quantum dots (QWQDs) can generate the white light emission. The positional design of different layers i.e., core/shell QD emitters is a critical factor for white emissive devices. The blue emission generated by CdS core mixes with green/orange components originating from ZnS inner shell and creates an efficiency white light emission. Then, we fabricate a white-QDLED with a device structure of FTO/ ZnO / QD / CBP/ MoO3 / Al films. A thin film of CdS/ZnS/CdS/ZnS QDs is deposited by electrostatically assembled colloidal QD solutions. The experimental results show that the emission spectra of QDs and current density through the LED are controlled by varying the particle sizes. The peaks of absorbance and Photoluminescence (PL) spectrums for core/shell structures get the red shifted as the dot size increases. Furthermore, this QD-LED with a smaller nano particle layer has a higher current density.

Unveiling the composite structures of emissive consolidated p–i–n junction nanocells for white light emission

Nanoscale ◽  
2018 ◽  
Vol 10 (29) ◽  
pp. 13867-13874
Author(s):  
Kyu Seung Lee ◽  
Jaeho Shim ◽  
Hyunbok Lee ◽  
Sang-Youp Yim ◽  
Basavaraj Angadi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Small Molecules ◽  
Active Layer ◽  
White Light ◽  
Composite Structures ◽  
Light Emission ◽  
Light Emitting Diode ◽  
White Light Emission ◽  
Light Emitting ◽  
White Electroluminescence

Hybrid organic-Red-Green-Blue (RGB) color quantum dots were incorporated into consolidated p(polymer)–i(RGB quantum dots)–n(small molecules) junction structures to fabricate a single active layer for a light emitting diode device for white electroluminescence.

Stable CsPbX3@SiO2 Perovskite Quantum Dots for White-Light Emitting Diodes

2020 ◽  
Vol 15 (5) ◽  
pp. 599-606
Author(s):  
Jian Xu ◽  
Hongxiang Zhang ◽  
Chunxia Wu ◽  
Jun Dai
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Synthesis Method ◽  
Water Contact ◽  
Light Emitting ◽  
Perovskite Quantum Dots ◽  
The Stability ◽  
White Light Emitting Diodes

In this article, we reported the synthesis method of stable CsPbX3@SiO2 quantum dots using cesium acetate instead of cesium carbonate. The results showed that CsPbX3@SiO2 presents good crystallinity and excellent luminescence properties. The coating layer of SiO2 on the CsPbX3 quantum dots surface blocks the air and water contact and suppresses anion exchange between the quantum dots, which dramatically enhances the stability. White light-emitting diode devices are manufactured by integrating the green CsPbBr3@SiO2 quantum dots and red CsPbBr1 I2@SiO2 quantum dots on the blue GaN chips. The devices show stable white light emission with Commission Internationale de L'Eclairage color coordinates (0.3511, 0.3437), and the white light intensity keeps unchanged after continuously working for 16 hours. The results indicate that CsPbX3@SiO2 quantum dots can be an ideal down-conversion fluorescent material for white light-emitting diode devices.

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