Nanoprinting with Crystal Engineering for Perovskite Lasers

Area of Science:

• Materials Science
• Optoelectronics
• Nanotechnology

Background:

• Metal halide perovskites offer excellent optical gain and solution processability for laser applications.
• Current fabrication methods for perovskite laser cavities are limited by chemical synthesis or lithography, resulting in rigidity or poor performance.

Purpose of the Study:

• To introduce a novel 3D printing technique for fabricating high-performance perovskite submicro-lasers.
• To demonstrate on-demand tuning of lasing characteristics and explore applications in anticounterfeiting.

Main Methods:

• Direct electrohydrodynamic 3D printing of inorganic perovskite submicro-lasers.
• Crystal engineering and vapor-phase solvent engineering for enhanced crystallinity.
• Two-photon pumped Fabry-Pérot mode lasing measurements.

Main Results:

• Freestanding perovskite submicro-lasers with tailored dimensions and locations were successfully printed.
• Achieved high-performance vertical lasing with a low threshold of 2.98 μJ cm⁻².
• Demonstrated length-dependent lasing for multilevel anticounterfeiting labels.

Conclusions:

• The direct 3D printing approach offers a simple and flexible route to tune laser characteristics.
• This additive manufacturing method combined with crystal engineering advances microphotonic circuitry design and performance.
• Potential applications include advanced anticounterfeiting solutions and integrated photonic devices.