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Continuous-Wave Lasing in Perovskite LEDs with an Integrated Distributed Feedback Resonator.
Kaichuan Wen1, Yu Cao2,3, 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.
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.
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.
