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Multislip-enabled morphing of all-inorganic perovskites
Xiaocui Li1,2,3, You Meng2, Wanpeng Li2,3
1Department of Mechanical Engineering, City University of Hong Kong, Kowloon, China.
Nature Materials
|August 14, 2023
Summary
All-inorganic lead halide perovskites (CsPbX3) exhibit remarkable plasticity, allowing them to be shaped without damage. This breakthrough opens new possibilities for manufacturing advanced optoelectronic and energy devices.
Area of Science:
- Materials Science
- Solid-State Physics
- Optoelectronics
Background:
- All-inorganic lead halide perovskites (CsPbX3) are crucial for energy conversion and optoelectronics due to their performance and stability.
- Shaping these materials without compromising function is vital for device design and manufacturing.
- Inorganic semiconductors are typically brittle, limiting their formability.
Purpose of the Study:
- To investigate the mechanical deformability of single-crystal CsPbX3 micropillars.
- To explore the potential of CsPbX3 as a morphable semiconductor for advanced applications.
- To understand the underlying mechanisms of plasticity in CsPbX3.
Main Methods:
- In situ compression of single-crystal CsPbX3 micropillars.
- Atomic-resolution transmission electron microscopy (TEM).
- First-principles and atomistic simulations.
Main Results:
- CsPbX3 micropillars were successfully morphed into various shapes (cubic, L, Z, arches) without cracks.
- Exceptional plasticity was attributed to successive slips of partial dislocations on multiple slip systems.
- Optoelectronic performance and bandgap remained unchanged after deformation.
Conclusions:
- CsPbX3 perovskites demonstrate significant plasticity, behaving as deformable inorganic semiconductors.
- This plasticity enables shape morphing without functional degradation.
- These findings have profound implications for manufacturing advanced optoelectronics and energy systems.
