Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots

Fengshou Tian; Tianhong Zhou; Xuanyu Zhang; Rui Chen; Shuming Chen

doi:10.1038/s41377-025-01972-1

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Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots

Original Articles

- Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots
- Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots
- Light: Science & Applications 2025年14卷第10期页码：3012-3021
- Affiliations：
  
  State Key Laboratory of Quantum Functional Materials, 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/s41377-025-01972-1
  中图分类号：
- 收稿：2025-03-12，
  
  修回：2025-07-13，
  
  录用：2025-07-21，
  
  网络出版：2025-08-19，
  
  纸质出版：2025-10-31
- Accepted：
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Fengshou Tian, Tianhong Zhou, Xuanyu Zhang, 等. Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots[J]. Light: Science & Applications, 2025,14(10):3012-3021.

Tian, F. S. et al. Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots. Light: Science & Applications, 14, 3012-3021 (2025).
Fengshou Tian, Tianhong Zhou, Xuanyu Zhang, 等. Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots[J]. Light: Science & Applications, 2025,14(10):3012-3021. DOI： 10.1038/s41377-025-01972-1.

Tian, F. S. et al. Electrically pumped surface-emitting amplified spontaneous emission from colloidal quantum dots. Light: Science & Applications, 14, 3012-3021 (2025). DOI： 10.1038/s41377-025-01972-1.

摘要

Abstract

Colloidal quantum dots (QDs) are promising gain materials for realizing solution-processable

wavelength-tunable and low-cost laser diodes. However

achieving electrically pumped amplified spontaneous emission (ASE) in QDs

a prerequisite for lasing

is hampered by the low net optical gain and low current injection of the diodes. Here we demonstrate electrically pumped and surface-emitting ASE from QDs by electro-thermal-optically co-designing a quantum-dot light-emitting diode (QLED) with high net optical gain and high current injection. By developing a top-emitting cavity featuring a Ag/indium-zinc-oxide (IZO) bottom reflective electrode and a IZO/Ag top semi-transparent electrode

the QD emission is effectively resonated; moreover

not only are the surface plasmon polariton losses induced by the metallic electrodes completely eliminated

but also the optical field can be confined primarily within the QDs

resulting in a reduction in loss and a 2-fold enhancement in gain. As a result

the QLED exhibits surface-emitting ASE with a threshold of 10 μJ cm

−2

when pumped by a 100 fs laser at 77 K. By building the QLED directly on a Si heat sink and driving the QLED with an ns-pulsed current source

the Joule heat is effectively dissipated

allowing the QLED to operate stably even at a high current of 2000 A cm

−2

. At 153 K and an injection current of 94 A cm

−2

the QLED demonstrates surface-emitting ASE with strong directionality

high intensity and narrow bandwidth. The developed QLED

capable of generating surface-emitting ASE

paves the way for the development of QD based vertical cavity surface-emitting laser diodes.

关键词

Keywords

references

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