Room-temperature liquid diffused separation induced crystallization for high-quality perovskite single crystals

Area of Science:

• Materials Science
• Crystallography
• Optoelectronics

Background:

• Large single crystals are crucial for understanding intrinsic material properties.
• Perovskite single crystals hold promise for optoelectronic applications.

Purpose of the Study:

• To develop a novel method for growing high-quality perovskite single crystals.
• To elucidate the growth kinetics and characterize the properties of these crystals.

Main Methods:

• Room-temperature liquid diffused separation induced crystallization using silicone oil.
• Separation of solvent from perovskite precursors.
• Characterization of structural and optoelectronic properties.

Main Results:

• Achieved high-quality perovskite single crystals (CH3NH3PbBr3 example).
• Exhibited a ~1 µs carrier lifetime and low trap density (4.4 × 10^9 cm^-3).
• Demonstrated a high crystal yield of 92%.

Conclusions:

• The diffused separation induced crystallization strategy is effective for advancing perovskite single crystal growth.
• The resulting crystals are suitable for visible light and X-ray detection.
• Further understanding of growth mechanisms will drive optoelectronic applications.