Self-Regulated Facet Stability During Solution Growth of Perovskite Crystals
April 7, 2025
The understanding of the growth mechanisms of perovskite crystals provides insights for further improving the quality of solution-grown crystals.
Scientific Achievement
We answered one scientific question: Is perovskite crystal growth in solution through monomer or particle attachment? We observe a cooler interfacial region (1.5-4 micrometers from the crystal edge). This cooler region serves as a protective layer, hindering the attachment of particles with random orientations, maintaining crystal facet orientation.
Significance and Impact
Solution growth of metal-halide perovskites has enabled the development of applications including solar cells, light-emitting diodes and detectors, and chiral materials, but the crystal growth mechanism remains unclear.
Research Details
- We grew thin single crystals and built a microscopic absorption measurement system to measure the solution absorption at the solid/solution interface.
- By establishing a temperature dependent solution absorption, we can use location-dependent absorption spectra to determine the temperature profile.
