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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Continuous-Wave Lasing in Perovskite LEDs with an Integrated Distributed Feedback Resonator.

Kaichuan Wen¹, Yu Cao^2,3, Lianghui Gu¹

¹Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM) & School of Flexible Electronics (Future Technologies), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China.

Advanced Materials (Deerfield Beach, Fla.)

|September 21, 2023

Summary

This summary is machine-generated.

Researchers achieved continuous-wave lasing in efficient perovskite light-emitting diodes (LEDs) with integrated resonators. This breakthrough advances the development of electrically pumped perovskite laser diodes by demonstrating carrier injection exceeding optical pumping thresholds.

Keywords:

continuous-wave light-emitting diodes metal halide perovskites perovskite lasers

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Area of Science:

Materials Science
Optoelectronics
Semiconductor Physics

Background:

Electrically pumped laser diodes from solution-processed semiconductors remain a significant challenge.
Metal halide perovskites offer promising optoelectronic properties for laser diode applications.
Achieving continuous-wave (CW) lasing in electroluminescent devices is crucial for current-injection laser diodes.

Purpose of the Study:

To demonstrate CW lasing in an efficient perovskite light-emitting diode (LED) with an integrated distributed feedback resonator.
To investigate the feasibility of achieving current-injection laser diodes using perovskite materials.
To overcome the challenge of integrating resonant cavities into efficient LEDs capable of sustaining intensive carrier injection.

Main Methods:

Fabrication of an efficient perovskite LED with an integrated distributed feedback resonator.
Optical pumping experiments to achieve and characterize continuous-wave lasing.
Measurement of lasing threshold and device performance at cryogenic temperatures (110 K).
Evaluation of carrier injection rates at high current densities.

Main Results:

Demonstration of CW lasing in a perovskite LED with an integrated distributed feedback resonator.
A low lasing threshold of 220 W cm^-2 was achieved at 110 K.
The LED operated effectively at a current density of 330 A cm^-2, surpassing optical pumping thresholds.
Carrier injection rates were shown to exceed the requirements for optically pumped lasing.

Conclusions:

Continuous-wave lasing has been successfully demonstrated in an efficient perovskite LED with an integrated resonator.
The results indicate that electrically pumped perovskite laser diodes are achievable.
Overcoming Joule heating is identified as the key remaining challenge for realizing practical electrically pumped perovskite laser diodes.