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Enhanced Nonlinear Optical Coefficients of MAPbI3 Thin Films by Bismuth Doping
C Redondo-Obispo1, I Suárez1,2, S J Quesada1
1Escuela Técnica Superior de Ingeniería de Telecomunicación, Universidad Rey Juan Carlos, C/Tulipán s/n, 28933 Madrid, Spain.
The Journal of Physical Chemistry Letters
|February 19, 2020
Summary
Bismuth doping enhances the stability and nonlinear optical properties of hybrid halide perovskites (MAPbI3). This research paves the way for cost-effective nonlinear optical devices using these materials.
Area of Science:
- Materials Science
- Optoelectronics
- Solid-State Physics
Background:
- Hybrid halide perovskites exhibit promising nonlinear optical (NLO) properties.
- Poor photostability and environmental stability limit their practical applications.
- MAPbI3 is a widely studied perovskite with significant NLO potential.
Purpose of the Study:
- To improve the stability and NLO properties of MAPbI3.
- To investigate the effect of Bismuth (Bi3+) doping on MAPbI3.
- To explore the potential for practical NLO applications.
Main Methods:
- Homogeneous substitution of Pb2+ with Bi3+ in MAPbI3.
- Fabrication of thin films with varying Bi content.
- Characterization of nonlinear refractive (n2) and absorptive (β) coefficients.
- Evaluation of photostability and laser-induced damage thresholds.
Main Results:
- Bi doping significantly enhances environmental and photostability.
- Optimal Bi content (around 2 atom %) increases n2 by up to 4x and β by up to 3.5x.
- Higher doping levels improve laser fluence damage thresholds.
- Undoped MAPbI3 shows lower NLO coefficients and stability.
Conclusions:
- Bismuth doping is an effective strategy to enhance the stability and NLO performance of MAPbI3.
- Engineered MAPbI3 offers a pathway for cost-effective nonlinear optical devices.
- Potential applications include optical limiting and harmonic generation in optoelectronics.
