High Quality Factor in Solution-Processed Inorganic Microcavities Embedding CsPbBr₃ Perovskite Nanocrystals.

Area of Science:

• Photonics and Materials Science
• Nanotechnology and Optoelectronics

Background:

• Optical microcavities are crucial for controlling light-matter interactions and light propagation.
• Conventional microcavity fabrication relies on costly inorganic materials and complex, non-scalable processes.

Purpose of the Study:

• To present a scalable, solution-based fabrication method for planar optical resonators.
• To achieve high performance comparable to conventional microcavities using accessible materials and processes.

Main Methods:

• Fabrication of high dielectric contrast inorganic Bragg mirrors via sol-gel deposition.
• Integration of cesium lead bromide (CsPbBr3) perovskite nanocrystals for light emission.
• Characterization of microcavity performance, including quality factor and emission properties.

Main Results:

• Achieved a record quality factor of ~220 for solution-processed inorganic microcavities.
• Demonstrated strong emission redistribution with a 3-fold enhancement in directional intensity.
• Successfully coupled solution-processed Bragg mirrors with perovskite nanocrystals.

Conclusions:

• This work establishes a viable, cost-effective, and scalable approach for fabricating high-performance optical microcavities.
• The developed method opens new avenues for advanced optical and optoelectronic devices using solution-processed materials.