Related Experiment Video
Updated: Jul 10, 2025
08:12
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
9.6K
Strain Engineering in Perovskites: Mutual Insight on Oxides and Halides
Min-Ju Choi1, Jung-Woo Lee2, Ho Won Jang1,3
1Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.
Advanced Materials (Deerfield Beach, Fla.)
|November 24, 2023
Summary
Strain engineering in perovskite materials, including oxides and halides, can enhance energy conversion devices. This study explores methods and impacts of strain on perovskite properties for improved performance.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Perovskite materials are crucial for electronic and optoelectronic devices like solar cells.
- Their properties are tunable, but strain engineering's combined effect on oxides and halides is understudied.
Purpose of the Study:
- To discuss strain engineering in perovskites for energy conversion devices.
- To provide insights into both oxide and halide perovskites.
Main Methods:
- Experimental methods for applying strain: thermal mismatch, lattice mismatch, defects, doping, light illumination, and flexible substrates.
- Analysis of strain's influence on structure, bandgap, chemical reactivity, and defect formation energy.
Main Results:
- Strain engineering significantly impacts perovskite structure, including symmetry and octahedral distortion.
- Strain affects the bandgap, chemical reactivity, and defect formation energy of perovskites.
Conclusions:
- Strain engineering offers a powerful approach to enhance perovskite-based energy conversion devices.
- Further research into strain effects can optimize perovskite performance for solar cells and LEDs.
More Related Videos
Related Concept Videos
01:29Three-Dimensional Analysis of Strain
221
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
221
01:12Transformation of Plane Strain
168
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
168
01:19Thermal Strain
1.3K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
1.3K
01:18Mohr's Circle for Plane Strain
533
Mohr's circle is a crucial graphical method used to analyze plane strain by plotting strain on a set of cartesian coordinates, where the abscissa is normal strain ∈ and the ordinate is shear strain γ. Similarly to Mohr’s circle for plane stress, two points X and Y are plotted. Their coordinates are (∈x, -γXY) and (∈Y, γXY), respectively.
Mohr's circle visually represents the strain states under various conditions, which is essential for...
Mohr's circle visually represents the strain states under various conditions, which is essential for...
533
01:27Measurements of Strain
993
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
993
01:20Shearing Strain
304
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
304