Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application

Qingkai Zhang; Kaiyu Yang; Chengyu Luo; Zhihan Lin; Weiguo Chen; Yongsheng Yu; Hailong Hu; Fushan Li

doi:10.1038/s41377-025-01959-y

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Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application

Original Articles

- Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application
- Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application
- Light: Science & Applications 2025年14卷第10期页码：3045-3057
- Affiliations：
  
  1.College of Physics and Information Engineering, Fuzhou University, Fuzhou, China
  2.Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, China
- Author bio：
  
  Kaiyu Yang (kaikaibrian@fzu.edu.cn)
  Fushan Li (fsli@hotmail.com)
- Funds：
- DOI：10.1038/s41377-025-01959-y
  中图分类号：
- 收稿：2025-02-17，
  
  修回：2025-07-09，
  
  录用：2025-07-09，
  
  网络出版：2025-08-21，
  
  纸质出版：2025-10-31
- Accepted：
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Qingkai Zhang, Kaiyu Yang, Chengyu Luo, 等. Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application[J]. Light: Science & Applications, 2025,14(10):3045-3057.

Zhang, Q. K. et al. Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application. Light: Science & Applications, 14, 3045-3057 (2025).
Qingkai Zhang, Kaiyu Yang, Chengyu Luo, 等. Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application[J]. Light: Science & Applications, 2025,14(10):3045-3057. DOI： 10.1038/s41377-025-01959-y.

Zhang, Q. K. et al. Nanosecond response perovskite quantum dot light-emitting diodes with ultra-high resolution for active display application. Light: Science & Applications, 14, 3045-3057 (2025). DOI： 10.1038/s41377-025-01959-y.

摘要

Abstract

Perovskite quantum dots light-emitting diodes (PeLEDs) have been developed for next-generation high resolution display applications. However

the hindered charge injection and massive charge trapping due to the insulating and defective surface of quantum dots (QDs) usually lead to a slow rise in electroluminescence (EL) response

which makes it challenging to realize ultra-high refresh rate displays with nanosecond response. Herein

an ionic liquid 1-Butyl-3-methylimidazolium Trifluoromethanesulfonate ([BMIM

]

OTF) was used to enhance the crystallinity and reduce the surface area ratio of QDs

which effectively decreases defect state and injection barrier at the interface. Therefore

the rise time of EL response with steady-state is successfully reduced by over 75%. We further reduce the capacitance effect by decreasing the light-emitting unit area. Thus

ultra-high resolution (9072 pi

xel per inch) PeLEDs with light-emitting pixel size of 1.3 μm were realized

achieving a brightness exceeding 170

000 cd/m

and an external quantum efficiency up to 15.79%. Moreover

it achieves nanosecond ultrafast response time under steady-state

which is the fastest response time of PeLEDs reported so far. Our work represents the most advanced performance of ultra-high-resolution PeLEDs

and provides in-depth insights into the mechanism of improving their response speed

showing significant potential in high refresh rate active display application.

关键词

Keywords

references

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