Optimizing Printed Quasi-2D Luminescent Perovskite Films via Delaminated Metal-Organic Framework Modulation.

Area of Science:

• Materials Science
• Chemistry
• Physics

Background:

• Microelectronic printing is crucial for advancing pixel-array perovskite films, especially quasi-2D types.
• Uncontrolled perovskite crystallization during printing hinders the development of these advanced films.

Purpose of the Study:

• To demonstrate a novel in situ heterogeneous nucleation growth approach for quasi-2D perovskite films.
• To utilize delaminated metal-organic frameworks (MOFs) as modulators for controlled crystallization.

Main Methods:

• Employed delaminated layered Cadmium-based Metal-Organic Frameworks (Cd-MOF) as heterogeneous nucleation sites.
• Used phenylethylammonium (PEA+) in conjunction with Cd-MOF to regulate crystal growth and n-phase distribution.
• Incorporated Cd-MOF intercalation to alleviate stress and reduce defects in printed films.

Main Results:

• Achieved quasi-2D perovskite films with controlled crystallization and uniform n-phase distribution.
• Demonstrated significant reduction in film defects due to MOF intercalation.
• Obtained films with a high photoluminescence quantum yield (PLQY) of 37.40% and excellent luminescent stability.

Conclusions:

• MOF-assisted synthesis is a viable strategy for high-performance perovskite materials via microelectronic printing.
• This method offers a promising pathway for developing advanced optoelectronic devices.
• The controlled nucleation and growth approach significantly improves perovskite film quality and performance.