Air-Stable Room-Temperature Quasi-2D Tin Iodide Perovskite Microlasers

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Quasi-2D tin iodide perovskites (TIPs) offer a lead-free alternative for optoelectronic devices.
• Environmental instability, particularly in ambient conditions, has hindered the development of stable lasing in TIPs.
• Achieving stable room-temperature lasing is crucial for practical applications.

Purpose of the Study:

• To develop air-stable, room-temperature lasing materials based on quasi-2D tin iodide perovskites.
• To investigate the role of organic spacers in enhancing the stability and lasing performance of TIPs.
• To demonstrate lasing in both dielectric and plasmonic microlasers.

Main Methods:

• Synthesized quasi-2D tin iodide perovskites (TIPs) incorporating the organic spacer 5IPA3.
• Fabricated TIP microlasers with sizes as small as 4 μm.
• Utilized picosecond pulsed laser pumping to induce and measure lasing characteristics.
• Tested lasing stability under ambient conditions.

Main Results:

• Achieved air-stable, room-temperature lasing from quasi-2D TIP microcrystals.
• The incorporation of 5IPA3 significantly improved material stability compared to previous TIPs.
• Lasing was successfully demonstrated in both dielectric (n=4) and plasmonic (n=3, n=4) TIP microlasers.
• Lasing sustained for over 10^8 pump pulses under ambient conditions.

Conclusions:

• Quasi-2D tin iodide perovskites with enhanced stability can achieve practical room-temperature lasing.
• The use of specific organic spacers like 5IPA3 is critical for improving TIP stability.
• These findings represent a significant advancement toward the realization of tin-based perovskite photonic devices.