Single Crystal Growth of Hybrid Lead Bromide Perovskites Using a Spin-Coating Method

Area of Science:

• Materials Science
• Solid-State Physics
• Optoelectronics

Background:

• Hybrid perovskites are crucial for optoelectronic applications.
• Understanding single crystal properties is key to improving device performance.
• Methylammonium lead bromide (MAPbBr3) is a promising hybrid perovskite material.

Purpose of the Study:

• To synthesize micrometer-size single crystals of methylammonium lead bromide (MAPbBr3).
• To investigate the effect of spin coating parameters and additives on crystal growth.
• To characterize the optical properties of the synthesized single crystals.

Main Methods:

• Spin coating deposition on a quartz substrate.
• Controlled variation of rotation speed during deposition.
• Addition of N-cyclohexyl-2-pyrrolidone, dimethyl sulfoxide, or 4-tert-butylpyridine to precursor solutions.
• Characterization using transmittance and photoluminescence spectroscopy.

Main Results:

• Successfully grew micrometer-size MAPbBr3 single crystals.
• Additives significantly influenced crystal size, shape, and reduced defects.
• Crystals exhibited well-defined geometries and sustained optical resonating modes.
• High-quality single crystals were obtained, suitable for optoelectronic studies.

Conclusions:

• Spin coating with additives is an effective method for high-quality MAPbBr3 single crystal growth.
• Optimized crystal growth is essential for harnessing optoelectronic phenomena.
• The synthesized crystals demonstrate potential for advanced optical and electronic devices.