Face-to-face integrated tandem quantum-dot LEDs with high performance and multifunctionality

Haotao Li; Jiming Wang; Shuming Chen

doi:10.1038/s41377-025-01835-9

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Face-to-face integrated tandem quantum-dot LEDs with high performance and multifunctionality

Original Articles

- Face-to-face integrated tandem quantum-dot LEDs with high performance and multifunctionality
- Light: Science & Applications Vol. 14, Issue 6, Pages: 1739-1748(2025)
- Affiliations：
  
  Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Author bio：
  
  Shuming Chen (chen.sm@sustech.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01835-9
  CLC：
- Received：28 October 2024，
  
  Revised：11 March 2025，
  
  Accepted：17 March 2025，
  
  Published Online：25 April 2025，
  
  Published：30 June 2025
- Accepted：
Scan QR Code
Li, H. T., Wang, J. M. & Chen, S. M. Face-to-face integrated tandem quantum-dot LEDs with high performance and multifunctionality. Light: Science & Applications, 14, 1739-1748 (2025).
DOI：

Li, H. T., Wang, J. M. & Chen, S. M. Face-to-face integrated tandem quantum-dot LEDs with high performance and multifunctionality. Light: Science & Applications, 14, 1739-1748 (2025). DOI： 10.1038/s41377-025-01835-9.

摘要

Abstract

The realization of solution-processed tandem quantum-dot LEDs (QLEDs) remains a technical challenge due to the limitations of inefficient interconnect layer and the damage caused by multiple solution processes. Here

we develop a high performance tandem QLED by face-to-face integrating a top-emitting QLED with a transp

arent QLED. The top and bottom units can be addressed independently

thereby enabling the tandem QLED to operate in series

parallel

and color-tunable modes for multifunctionality. In series mode

QLEDs demonstrate an ultra-low turn-on voltage of 3.3 V and a record-breaking external quantum efficiency of 60.7%. In parallel mode

QLEDs achieve an impressive brightness of over 4.8 × 10

cd m

-2

. In color-tunable mode

the color

brightness

and color temperature can all be adjusted with a color tuning range of 114% NSTC. Moreover

both series and parallel connections contribute to an improved stability

resulting in a T

lifetime of nearly 30

000 h at 1000 cd m

-2

which is an improvement of approximately 2.8 times over control devices. Our work offers a feasible solution for achieving multifunctional tandem QLEDs with the advantages of solution processed

high efficiency

high brightness

long lifetime and full color tunability for various light source applications.

关键词

Keywords

references

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