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 Solution-processed double-layered hole transport layers for highly-efficient cadmium-free quantum-dot light-emitting diodes

2020 ◽  
Vol 28 (5) ◽  
pp. 6134 ◽  
Author(s):  
Fei Chen ◽  
Li-Jin Wang ◽  
Xu Li ◽  
Zhen-Bo Deng ◽  
Feng Teng ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Solution Processed ◽  
Light Emitting ◽  
Highly Efficient ◽  
Hole Transport Layers

Designing an electron-transport layer for highly efficient, reliable, and solution-processed organic light-emitting diodes

2017 ◽  
Vol 5 (12) ◽  
pp. 3097-3106 ◽  
Author(s):  
Jin-Hoon Kim ◽  
Jin-Woo Park
Keyword(s):  
Electron Transport ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Solution Processed ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Oled Performance

When using PEIE doped with n-type dopants as the ETL, ϕ of the cathode decreased, significantly improving OLED performance.

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.

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.

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