Heterostructure Devices

Bilayer 2D-3D Perovskite Heterostructure

A rationally designed 2D-3D perovskite stacking-layered architecture by in situ growing 2D PEA₂PbI₄ capping layers on top of 3D perovskite films was constructed to drastically improve the stability of perovskite solar cells without compromising their high performance. The conceptual design of bilayer 2D-3D heterostructures, as illustrated in Figure 1, pave the way to developing high-performance perovskite optoelectronics, including light-emitting diodes, photodetectors, lasers, and transistors.

Perovskite-MOF glassy composites

A new family of scalable composites can be fabricated through liquid-phase sintering of lead halide perovskite and metal-organic framework (MOF) glasses, enabling efficient surface defect passivation that impairs bright, narrow-band photoluminescence with a wide gamut for creating white light-emitting diodes. The processable composites show high stability against immersion in water and organic solvents as well as exposure to heat, light, air, and ambient humidity.

Figure 1 Schematic illustration of 2D-3D heterostructure for perovskite solar cells.

Figure 2 Photos of perovskites and their MOF glassy composites under UV irradiation.

References:

1. Advanced Functional Materials 2018, 28, 1706923.
2. ACS Nano 2023, 18, 67–88.
3. Science 2021, 374 (6567), 621–625.