scholarly journals Optimization of the electron transport in quantum dot light-emitting diodes by codoping ZnO with gallium (Ga) and magnesium (Mg)

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32066-32071 ◽  
Author(s):  
Hong Hee Kim ◽  
David O. Kumi ◽  
Kiwoong Kim ◽  
Donghee Park ◽  
Yeonjin Yi ◽  
...  
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Zno Nps ◽  
Light Emitting

Optimized QD-LEDs are fabricated using Ga–Mg-codoped ZnO NPs as ETL, which reached the LEmax and PEmax at 15.4 cd A−1 and 10.3 lm W−1.

Highly-efficient and all-solution-processed red-emitting InP/ZnS-based quantum-dot light-emitting diodes enabled by compositional engineering of electron transport layers

2019 ◽  
Vol 7 (25) ◽  
pp. 7636-7642 ◽  
Author(s):  
Fei Chen ◽  
Peiwen Lv ◽  
Xu Li ◽  
Zhenbo Deng ◽  
Feng Teng ◽  
...  
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Zno Nps ◽  
Solution Processed ◽  
Light Emitting ◽  
Highly Efficient

All-solution-processed red-emitting InP/ZnS-based QD-LEDs with a record ηEQE of 4.24% are successfully fabricated through the compositional engineering of colloidal ZnO NPs, which act as the electron transport layers.

scholarly journals A Study on the Stability of TiO2 Nanoparticles as an Electron Transport Layer in Quantum Dot Light-Emitting Diodes

2021 ◽  
Vol 59 (7) ◽  
pp. 476-480
Author(s):  
Moonbon Kim ◽  
Jiwan Kim
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Tio2 Nanoparticles ◽  
Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Zno Nps ◽  
Light Emitting ◽  
Tio2 Nps ◽  
Doped Tio2

We report highly efficient and robust quantum dot light-emitting diodes (QLEDs) with Li-doped TiO2 nanoparticles (NPs) as an electron transport layer (ETL). As core materials, ZnO-based inorganic NPs can enhance the performance of QLEDs due to their suitable energy level and solution processability. However, their fast electron mobility and instability in organic solvents are two main obstacles to practical display applications. The colloidal stability of TiO2 NPs in ethanol was confirmed after three day-storage, while ZnO NPs showed severe agglomeration. Inverted structure QLEDs using 3% Li-doped TiO2 NP were successfully fabricated and their optical/electrical properties were investigated. With 3% Li-doped TiO2 NPs, the charge balance in the emitting layer of the QLEDs was improved, which resulted in a maximum luminance of 159,840 cd/m2 and external quantum efficiency (EQE) of 9.12%. These results were comparable to the performance of QLEDs with commonly used ZnO NPs. Moreover, the QLEDs with the Li-doped TiO2 NPs showed more stable characteristics than those with ZnO NPs after 7 days in ambient conditions. The EQE of the QLEDs with Li-doped TiO2 NPs was reduced by only 4.9%. These results indicate that Li-doped TiO2 NPs show great promise for use as a solution based inorganic ETL for QLEDs.

Remarkable lifetime improvement of quantum-dot light emitting diodes by incorporating rubidium carbonate in metal-oxide electron transport layers

2019 ◽  
Vol 7 (32) ◽  
pp. 10082-10091 ◽  
Author(s):  
Yujin Lee ◽  
Hyo-Min Kim ◽  
Jeonggi Kim ◽  
Jin Jang
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Metal Oxide ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Remarkable Improvement ◽  
Operational Lifetime ◽  
Electron Transporting Layer ◽  
Doped Zno ◽  
Mg Doped

We demonstrated the remarkable improvement of efficiency roll-off and operational lifetime in red quantum dot light emitting diodes (R-QLEDs) by incorporating rubidium carbonate (Rb2CO3) in Mg doped ZnO (MZO) electron transporting layer (ETL).

scholarly journals Boosting the efficiency of inverted quantum dot light-emitting diodes by balancing charge densities and suppressing exciton quenching through band alignment

Nanoscale ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 592-602 ◽  
Author(s):  
Jiangyong Pan ◽  
Changting Wei ◽  
Lixi Wang ◽  
Jinyong Zhuang ◽  
Qianqian Huang ◽  
...  
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Band Alignment ◽  
Light Emitting ◽  
Charge Densities ◽  
Full Color

This work demonstrates high performance inverted full-color QLEDs by controlling electron transport and preventing exciton quenching.

Improving Charge-Imbalanced Problem of Quantum Dot Light-Emitting Diodes with TPBi/ZnO Electron Transport Layer

2019 ◽  
Vol 19 (10) ◽  
pp. 6152-6157
Author(s):  
Sanghyun Lee ◽  
Junekyun Park ◽  
Jaewon Jeong ◽  
Jaehyun Kim ◽  
Juhyung Kim ◽  
...  
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Light Emitting

Boosting the performance of quantum dot light-emitting diodes with Mg and PVP Co-doped ZnO as electron transport layer

2019 ◽  
Vol 75 ◽  
pp. 105411 ◽  
Author(s):  
Rashed Alsharafi ◽  
Yangbin Zhu ◽  
Fushan Li ◽  
Zhongwei Xu ◽  
Hailong Hu ◽  
...  
Keyword(s):  
Electron Transport ◽  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Doped Zno ◽  
Co Doped
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