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Published on: April 14, 2020
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Nonlinear Optical Properties of Cs2AgIn1-BiCl6 Single Crystals.
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.
The Journal of Physical Chemistry Letters
|May 25, 2024
Summary
This study explores lead-free double perovskites, specifically Cs2AgIn1-xBixCl6 single crystals, to understand their nonlinear optical properties. Findings reveal composition-tuned optical behavior and increased multiphoton absorption with bismuth, paving the way for new applications.
Area of Science:
- Materials Science
- Solid-State Physics
- Optoelectronics
Background:
- Lead-free double perovskites present a safer, more stable alternative to lead-based materials.
- Dual B-site cations offer tunable optical properties in double perovskites.
- Research into the nonlinear optical (NLO) properties of these materials is limited.
Purpose of the Study:
- To synthesize Cs2AgIn1-xBixCl6 single crystals (x = 0, 0.1, 0.25, 0.75, 1).
- To investigate the influence of composition on the NLO properties of these lead-free double perovskites.
- To explore potential applications of these materials.
Main Methods:
- Synthesis of Cs2AgIn1-xBixCl6 single crystals with varying Bi3+ concentrations.
- Characterization of the nonlinear optical properties, including second harmonic generation and multiphoton absorption.
- Analysis of the relationship between material composition and optical performance.
Main Results:
- Cs2AgInCl6 exhibits surface defect-induced second harmonic generation.
- Multiphoton absorption coefficients increase with higher Bi3+ concentration due to enhanced state density.
- Compositional tuning significantly impacts the NLO properties of the Cs2AgIn1-xBixCl6 system.
Conclusions:
- The study provides fundamental insights into the NLO properties of lead-free double perovskites.
- Compositional engineering of Cs2AgIn1-xBixCl6 is effective for tuning NLO responses.
- This research lays the groundwork for developing advanced NLO materials and applications.
