Electrically driven lasing from a dual-cavity perovskite device.

Area of Science:

• Optoelectronics
• Materials Science
• Semiconductor Physics

Background:

• Solution-processed semiconductor lasers are promising for wearable and scalable applications.
• Metal halide perovskites enable wavelength-adjustable, low-threshold lasing under optical pumping.
• Electrically driven lasing from perovskite semiconductors remains a significant challenge.

Purpose of the Study:

• To demonstrate an electrically driven perovskite laser.
• To overcome the limitations of current perovskite laser technology.
• To explore the potential of perovskite lasers in data transmission and computation.

Main Methods:

• Constructed a dual-cavity device by vertically integrating a single-crystal perovskite microcavity with a perovskite LED (PeLED) sub-unit.
• Utilized pulsed electrical excitation to achieve lasing action.
• Characterized the device's lasing threshold, operational stability, and modulation bandwidth.

Main Results:

• Achieved a minimum lasing threshold of 92 A cm⁻² under pulsed electrical excitation, significantly lower than organic lasers.
• Demonstrated an operational half-life (T50) of 1.8 hours, outperforming electrically pumped organic lasers.
• Showcased rapid modulation capability with a bandwidth of 36.2 MHz.

Conclusions:

• The integrated dual-cavity architecture is key to enabling efficient energy transfer and lasing action.
• Electrically driven perovskite lasers offer a promising alternative to organic lasers for advanced optoelectronic applications.
• The demonstrated device has potential for high-speed data transmission and computational tasks.