Boosting the performance of solution-processed quantum dots light-emitting diodes by a hybrid emissive layer via doping small molecule hole transport materials into quantum dots

2021 ◽  
pp. 106344
Author(s):  
Hanhao Liu ◽  
Jianhua Zou ◽  
Xiwen Zhu ◽  
Xiaohai Li ◽  
Haozhi Ni ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Small Molecule ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Solution Processed ◽  
Light Emitting ◽  
Emissive Layer

scholarly journals Solution-Processed Efficient Blue Phosphorescent Organic Light-Emitting Diodes (PHOLEDs) Enabled by Hole-Transport Material Incorporated Single Emission Layer

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 554
Author(s):  
Taeshik Earmme
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Emission Layer ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light ◽  
Single Emission ◽  
Blue Phosphorescent

Solution-processed blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a single emission layer with small-molecule hole-transport materials (HTMs) are demonstrated. Various HTMs have been readily incorporated by solution-processing to enhance hole-transport properties of the polymer-based emission layer. Poly(N-vinylcarbazole) (PVK)-based blue emission layer with iridium(III) bis(4,6-(di-fluorophenyl)pyridinato-N,C2′)picolinate (FIrpic) triplet emitter blended with solution-processed 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) gave luminous efficiency of 21.1 cd/A at a brightness of 6220 cd/m2 with an external quantum efficiency (EQE) of 10.6%. Blue PHOLEDs with solution-incorporated HTMs turned out to be 50% more efficient compared to the reference device without HTMs. The high hole mobility, high triplet energy of HTM, and favorable energy transfer between HTM blended PVK host and FIrpic blue dopant were found to be important factors for achieving high device performance. The results are instructive to design and/or select proper hole-transport materials in solution-processed single emission layer.

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

Efficient solution-processed small-molecule single emitting layer electrophosphorescent white light-emitting diodes

2010 ◽  
Vol 11 (8) ◽  
pp. 1344-1350 ◽  
Author(s):  
Liudong Hou ◽  
Lian Duan ◽  
Juan Qiao ◽  
Deqiang Zhang ◽  
Guifang Dong ◽  
...  
Keyword(s):  
Small Molecule ◽  
White Light ◽  
Efficient Solution ◽  
Light Emitting Diodes ◽  
Solution Processed ◽  
Light Emitting ◽  
White Light Emitting Diodes

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.

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