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Phase-Selective Solution Synthesis of Cd-Based Perovskite Derivatives and Their Structure/Emission Modulation
Tong Chang1, Qilin Wei1, Ziyi Wang1
1School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
Researchers developed a method to create new cadmium-based perovskite materials with tunable light emission. Doping and halogen substitution significantly improved their brightness and color output for optoelectronics.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Optoelectronics
Background:
- Perovskite derivatives exhibit rich phase structures and high emission efficiency, making them promising for optoelectronic applications.
- Controlling phase structures and emission properties is crucial for developing advanced optoelectronic devices.
Purpose of the Study:
- To explore a phase-selective solution synthetic route for diverse cadmium-based perovskite derivatives.
- To investigate the effects of doping and halogen substitution on the structural and optical properties of these materials.
Main Methods:
- Solvothermal synthesis of pristine tetragonal Cs7Cd3Br13.
- Antimony (Sb3+) doping to enhance photoluminescence quantum yield (PLQY).
- Halogen substitution to tune crystal structure and emission color.
- Material characterization and theoretical computation to understand mechanisms.
Main Results:
- Achieved a phase-selective synthesis of Cd-based perovskite derivatives.
- Sb3+ doping significantly boosted PLQY of Cs7Cd3Br13 from 8.28% to 57.62%.
- Halogen substitution modulated Sb:Cs7Cd3Br13, yielding tunable emission from cyan to orange (517-625 nm) with varied crystal structures.
Conclusions:
- Presented an effective strategy for synthesizing bright Cd-based perovskite derivatives with diverse structures and modulated emission.
- Provided insights into structure/emission modulation mechanisms through halogen substitution.
- Demonstrated potential for these materials in optoelectronic applications requiring tunable light emission.
