Controllable Growth of High-Quality Inorganic Perovskite Microplate Arrays for Functional Optoelectronics

Area of Science:

• Materials Science
• Nanotechnology
• Optoelectronics

Background:

• Inorganic perovskite single crystals are suitable for optoelectronic devices.
• Vapor-phase methods yield random crystal distribution due to lattice mismatch and nucleation issues.
• This limits the fabrication of integrated device arrays.

Purpose of the Study:

• To develop a strategy for controlled vapor-phase growth of cesium lead bromide perovskite (CsPbBr3) microplate arrays.
• To achieve uniform morphology, controlled location, and size of the microplates.
• To enable monolithic integration for advanced optoelectronic devices.

Main Methods:

• Introduction of perovskite seeds on substrates to overcome nucleation barriers.
• Epitaxial growth of CsPbBr3 crystals.
• Fabrication of microplate arrays with controlled size and location.

Main Results:

• High-quality CsPbBr3 microplate arrays with uniform morphology were successfully grown.
• Controlled location and size of microplates were achieved.
• Monolithic integration of CsPbBr3 microplate arrays on substrates was demonstrated.

Conclusions:

• The seeding strategy effectively controls vapor-phase growth of CsPbBr3 microplates.
• This method facilitates the fabrication of high-performance lasers and photodetectors.
• The approach offers scalable production of integrated optoelectronic devices.