scholarly journals Modelling charge transport and electro-optical characteristics of quantum dot light-emitting diodes

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Sung-Min Jung ◽  
Tae Hoon Lee ◽  
Sang Yun Bang ◽  
Soo Deok Han ◽  
Dong-Wook Shin ◽  
...  

AbstractsQuantum dot light-emitting diodes (QD-LEDs) are considered as competitive candidate for next-generation displays or lightings. Recent advances in the synthesis of core/shell quantum dots (QDs) and tailoring procedures for achieving their high quantum yield have facilitated the emergence of high-performance QD-LEDs. Meanwhile, the charge-carrier dynamics in QD-LED devices, which constitutes the remaining core research area for further improvement of QD-LEDs, is, however, poorly understood yet. Here, we propose a charge transport model in which the charge-carrier dynamics in QD-LEDs are comprehensively described by computer simulations. The charge-carrier injection is modelled by the carrier-capturing process, while the effect of electric fields at their interfaces is considered. The simulated electro-optical characteristics of QD-LEDs, such as the luminance, current density and external quantum efficiency (EQE) curves with varying voltages, show excellent agreement with experiments. Therefore, our computational method proposed here provides a useful means for designing and optimising high-performance QD-LED devices.

2020 ◽  
Vol 8 (42) ◽  
pp. 14834-14844
Author(s):  
Piotr Piatkowski ◽  
Sofia Masi ◽  
Pavel Galar ◽  
Mario Gutiérrez ◽  
Thi Tuyen Ngo ◽  
...  

Charge-carrier transfer (CT) from the perovskite host to PbS QDs were studied using fs-transient absorption and THz techniques. The CT rate constants increase with the size of QDs due to a change in the position of valence and conduction bands in PbS QDs.


2021 ◽  
pp. 2101069
Author(s):  
Siqi Jia ◽  
Haodong Tang ◽  
Jingrui Ma ◽  
Shihao Ding ◽  
Xiangwei Qu ◽  
...  

2016 ◽  
Vol 47 (1) ◽  
pp. 1472-1475 ◽  
Author(s):  
Wei Chen ◽  
Junjie Hao ◽  
Rui Lu ◽  
Lei Yang ◽  
Yiwen Li ◽  
...  

2017 ◽  
Vol 5 (35) ◽  
pp. 9138-9145 ◽  
Author(s):  
Zhaobing Tang ◽  
Jie Lin ◽  
Lishuang Wang ◽  
Ying Lv ◽  
Yongsheng Hu ◽  
...  

High performance top-emitting green quantum dot light-emitting diodes have been developed based on an all-solution process and with a bottom Al anode.


Nanoscale ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 5021-5029 ◽  
Author(s):  
Qasim Khan ◽  
Alagesan Subramanian ◽  
Guannan Yu ◽  
Khan Maaz ◽  
Delong Li ◽  
...  

Although all-inorganic perovskite light emitting diodes (PeLED) have satisfactory stability under an ambient atmosphere, producing devices with high performance is challenging.


2019 ◽  
Vol 75 (12) ◽  
pp. 1033-1037
Author(s):  
Jae Seung Shin ◽  
Jong Hun Yu ◽  
Su Been Heo ◽  
Seong Jun Kang

2016 ◽  
Vol 37 ◽  
pp. 280-286 ◽  
Author(s):  
Lei Wang ◽  
Tao Chen ◽  
Qingli Lin ◽  
Huaibin Shen ◽  
Aqiang Wang ◽  
...  

Nanoscale ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 592-602 ◽  
Author(s):  
Jiangyong Pan ◽  
Changting Wei ◽  
Lixi Wang ◽  
Jinyong Zhuang ◽  
Qianqian Huang ◽  
...  

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


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