scholarly journals Effects of UV Irradiation and Storage on the Performance of Inverted Red Quantum-Dot Light-Emitting Diodes

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1606
Author(s):  
Yu Luo ◽  
Junjie Wang ◽  
Pu Wang ◽  
Chaohuang Mai ◽  
Jian Wang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Uv Irradiation ◽  
Power Efficiency ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Storage Period ◽  
Charge Balance ◽  
Light Emitting ◽  
Practical Applications ◽  
And Storage

We report the effects of ultraviolet (UV) irradiation and storage on the performance of ZnO-based inverted quantum-dot light-emitting diodes (QLEDs). The effects of UV irradiation on the electrical properties of ZnO nanoparticles (NPs) were investigated. We demonstrate that the charge balance was enhanced by improving the electron injection. The maximum external quantum efficiency (EQE) and power efficiency (PE) of QLEDs were increased by 26% and 143% after UV irradiation for 15 min. In addition, we investigated the storage stabilities of the inverted QLEDs. During the storage period, the electron current from ZnO gradually decreased, causing a reduction in the device current. However, the QLEDs demonstrated improvements in maximum EQE by 20.7% after two days of storage. Our analysis indicates that the suppression of exciton quenching at the interface of ZnO and quantum dots (QDs) during the storage period could result in the enhancement of EQE. This study provides a comprehension of the generally neglected factors, which could be conducive to the realization of high-efficiency and highly storage-stable practical applications.

High efficiency quantum dot light emitting diodes from positive aging

Nanoscale ◽  
2017 ◽  
Vol 9 (38) ◽  
pp. 14451-14457 ◽  
Author(s):  
Krishna P. Acharya ◽  
Alexandre Titov ◽  
Jake Hyvonen ◽  
Chenggong Wang ◽  
Jean Tokarz ◽  
...  
Keyword(s):  
Quantum Dot ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Positive Aging ◽  
Polymer Hybrid ◽  
Colloidal Quantum Dot

Colloidal quantum dot-polymer hybrid light emitting diodes (QLEDs) that exhibit external quantum efficiencies >12% for all three primary colors (21% from green) have been demonstrated.

High‐efficiency quantum dot light‐emitting diodes with blue cadmium‐free quantum dots

2020 ◽  
Vol 28 (5) ◽  
pp. 401-409 ◽  
Author(s):  
Tatsuya Ryowa ◽  
Takeshi Ishida ◽  
Yusuke Sakakibara ◽  
Keisuke Kitano ◽  
Masaya Ueda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting

All-solution processed inverted green quantum dot light-emitting diodes with concurrent high efficiency and long lifetime

2019 ◽  
Vol 6 (10) ◽  
pp. 2009-2015 ◽  
Author(s):  
Zhiwen Yang ◽  
Qianqian Wu ◽  
Gongli Lin ◽  
Xiaochuan Zhou ◽  
Weijie Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting Diode ◽  
Shell Growth ◽  
Solution Processed ◽  
Light Emitting ◽  
Long Lifetime

An all-solution processed inverted green quantum dot-based light-emitting diode with concurrent high efficiency and long lifetime is obtained by precisely controlled double shell growth of quantum dots.

P-108: Positive Aging Mechanisms for High-efficiency Blue Quantum Dot Light-emitting Diodes

2018 ◽  
Vol 49 (1) ◽  
pp. 1622-1624 ◽  
Author(s):  
Wen-Cheng Ding ◽  
Chia-Hsun Chen ◽  
Li-Jen Huang ◽  
Ming-Cheng Kuo ◽  
Ya-Pei Kuo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Positive Aging ◽  
Aging Mechanisms

Nonblinking Quantum-Dot-Based Blue Light-Emitting Diodes with High Efficiency and a Balanced Charge-Injection Process

ACS Photonics ◽  
2018 ◽  
Vol 5 (3) ◽  
pp. 939-946 ◽  
Author(s):  
Qingli Lin ◽  
Lei Wang ◽  
Zhaohan Li ◽  
Huaibin Shen ◽  
Lijun Guo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Blue Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Charge Injection ◽  
Light Emitting ◽  
Injection Process
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