Comparative Study of Red/Green/Blue Quantum-Dot Light-Emitting Diodes by Time-Resolved Transient Electroluminescence

2021 ◽  
pp. 7019-7025
Author(s):  
Qibin Shen ◽  
Yanlei Hao ◽  
Luying Ma ◽  
Xiaoyu Wang
Keyword(s):  
Quantum Dot ◽  
Comparative Study ◽  
Light Emitting Diodes ◽  
Time Resolved ◽  
Light Emitting ◽  
Transient Electroluminescence

scholarly journals Polymeric Hole Transport Materials for Red CsPbI3 Perovskite Quantum-Dot Light-Emitting Diodes

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 896
Author(s):  
Zong-Liang Tseng ◽  
Shih-Hung Lin ◽  
Jian-Fu Tang ◽  
Yu-Ching Huang ◽  
Hsiang-Chih Cheng ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Comparative Study ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Device Performance ◽  
Light Emitting ◽  
Device Structures ◽  
Hole Transporting ◽  
Hole Transporting Materials

In this study, the performances of red CsPbI3-based all-inorganic perovskite quantum-dot light-emitting diodes (IPQLEDs) employing polymeric crystalline Poly(3-hexylthiophene-2,5-diyl) (P3HT), poly(9-vinycarbazole) (PVK), Poly(N,N′-bis-4-butylphenyl-N,N′-bisphenyl)benzidine (Poly-TPD) and 9,9-Bis[4-[(4-ethenylphenyl)methoxy]phenyl]-N2,N7-di-1-naphthalenyl-N2,N7-diphenyl-9H-fluorene-2,7-diamine (VB-FNPD) as the hole transporting layers (HTLs) have been demonstrated. The purpose of this work is an attempt to promote the development of device structures and hole transporting materials for the CsPbI3-based IPQLEDs via a comparative study of different HTLs. A full-coverage quantum dot (QD) film without the aggregation can be obtained by coating it with VB-FNPD, and thus, the best external quantum efficiency (EQE) of 7.28% was achieved in the VB-FNPD device. We also reported a standing method to further improve the degree of VB-FNPD polymerization, resulting in the improved device performance, with the EQE of 8.64%.

Degradation Studies of Colloidal Quantum Dot Light-Emitting Diodes

2011 ◽  
Vol 1286 ◽  
Author(s):  
Jie Liu ◽  
Chuang Xie ◽  
Yu Zhang ◽  
Wenjia Hu ◽  
Shawn Pickering ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Steady State ◽  
Quantum Dot ◽  
Thermal Instability ◽  
Light Emitting Diodes ◽  
Degradation Mechanism ◽  
Time Resolved ◽  
Light Emitting ◽  
Colloidal Quantum Dot ◽  
Time Resolved Photoluminescence

ABSTRACTThe degradation mechanism of CdSe/ZnS quantum dots (QDs) light-emitting diodes (LEDs) was investigated with steady-state and time-resolved photoluminescence measurements. Our study reveals that the degradation is associated with the decreasing quantum efficiency of the CdSe/ZnS QDs in the devices. Two mechanisms that cause the efficiency reduction were verified in the experiments: i.e., thermal instability and luminescence quenching.

Mechanisms of operation in quantum-dot light-emitting diodes

2019 ◽  
pp. 947
Author(s):  
Shoichi sano ◽  
Takashi Nagase ◽  
Takashi Kobayashi ◽  
Hiroyoshi Naito
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Light Emitting

scholarly journals On the degradation mechanisms of quantum-dot light-emitting diodes

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Song Chen ◽  
Weiran Cao ◽  
Taili Liu ◽  
Sai-Wing Tsang ◽  
Yixing Yang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Degradation Mechanisms ◽  
Light Emitting

Enhanced Performance of Pixelated Quantum Dot Light‐Emitting Diodes by Inkjet Printing of Quantum Dot–Polymer Composites

2021 ◽  
pp. 2002129
Author(s):  
Heebum Roh ◽  
Donghyun Ko ◽  
Dong Yeol Shin ◽  
Jun Hyuk Chang ◽  
Donghyo Hahm ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Polymer Composites ◽  
Inkjet Printing ◽  
Light Emitting Diodes ◽  
Light Emitting
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