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Bright Luminous and Stable CsPbBr3 @PS Microspheres Prepared via Facile Anti-solvent Method using CTAB as Double
Juan Zhou1, Husitu Lin1, Yingchun Yu1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|March 24, 2020
Summary
Cesium lead halide perovskite quantum dots (PQDs) were synthesized with enhanced photoluminescence. Encapsulating these PQDs in polystyrene microspheres significantly improved their stability against environmental factors.
Area of Science:
- Materials Science
- Nanotechnology
- Quantum Dot Research
Background:
- Cesium lead halide perovskite quantum dots (PQDs) are gaining interest due to their superior optical properties and applications in LEDs and photovoltaics.
- Existing PQDs often suffer from poor stability, limiting their practical implementation.
Purpose of the Study:
- To develop a facile method for synthesizing stable CsPbBr3 PQDs.
- To enhance the photoluminescence and stability of PQDs for advanced applications.
Main Methods:
- Synthesized CsPbBr3 PQDs using an anti-solvent method with cetyltrimethylammonium bromide (CTAB) as a dual modifier.
- Formed CsPbBr3 @PS microspheres via an electrospraying process to improve PQD stability.
Main Results:
- Obtained well-dispersed cubic CsPbBr3 PQDs (10-15 nm) with high photoluminescence quantum yield (PLQY) up to 43%.
- CsPbBr3 @PS microspheres demonstrated excellent luminescence and significantly enhanced stability against air and UV light due to polystyrene's hydrophobicity.
Conclusions:
- The anti-solvent method with CTAB is effective for producing high-quality CsPbBr3 PQDs.
- Encapsulation in polystyrene microspheres provides a robust strategy for stabilizing PQDs, paving the way for their use in stable optoelectronic devices.
