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Updated: Aug 30, 2025
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.6K
Optical Properties of a CsMnBr3 Single Crystal
Yingzhuang Xu1, Junzi Li1, Fuli Zhao2
1Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
ACS Omega
|August 29, 2022
Summary
This study explores lead-free CsMnBr3 single crystals, revealing unique optical properties like red emission and saturable absorption. These findings highlight their potential as stable, eco-friendly optoelectronic materials.
Area of Science:
- Materials Science
- Optoelectronics
- Solid-State Physics
Background:
- Lead-free perovskites are promising for optoelectronic devices due to their stability.
- Understanding fundamental optical properties is crucial for their application.
- Cesium manganese bromide (CsMnBr3) is a potential candidate for these applications.
Purpose of the Study:
- To synthesize and investigate the optical properties of CsMnBr3 single crystals (SC).
- To compare the optical properties of CsMnBr3 SC with its nanocrystal (NC) form.
- To evaluate the potential of CsMnBr3 SC as an environmentally friendly optoelectronic material.
Main Methods:
- Synthesis of CsMnBr3 single crystals.
- Temperature-dependent photoluminescence (PL) spectroscopy to identify phase transitions.
- Measurement of electron-phonon coupling strength.
- Characterization of nonlinear optical properties, including saturable absorption and two-photon absorption.
Main Results:
- CsMnBr3 SC exhibits red emission at ~621 nm.
- A phase transition was observed in SC at ~100 K, absent in NCs.
- SC shows stronger electron-longitudinal optical phonon coupling than NCs at low temperatures.
- SC demonstrates strong saturable absorption (~27% modulation depth) and a large two-photon absorption coefficient (~0.035 cm GW^-1).
Conclusions:
- CsMnBr3 SC possesses unique optical properties suitable for optoelectronic applications.
- The observed phase transition and strong electron-phonon coupling influence its optical behavior.
- CsMnBr3 SC is a promising environmentally friendly material for optoelectronic devices.
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