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Tailoring CsPbBr3 Growth via Non-Polar Solvent Choice and Heating Methods
Hediyeh Zamani1, Tsung-Hsing Chiang1, Kaylie R Klotz1
1Department of Chemistry, Syracuse University, 111 College Place, Syracuse, New York 13244, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|July 21, 2022
Summary
Benzyl ether (BE) solvent promotes larger cesium lead halide nanoplatelets compared to 1-octadecene (ODE). This solvent effect on precursor solubility influences crystal growth and final morphology.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Cesium lead halide (CsPbX3) nanoplatelets are promising optoelectronic materials.
- Controlling nanoplatelet size and morphology is crucial for tuning their properties.
Purpose of the Study:
- To investigate the influence of non-polar solvents on CsPbX3 nanoplatelet growth.
- To understand the role of solvent-ligand interactions in precursor formation and crystal growth.
Main Methods:
- Synthesis of CsPbBr3 nanoplatelets using benzyl ether (BE) and 1-octadecene (ODE) solvents.
- Employed one-pot microwave irradiation (MWI) and hot-injection methods.
- Characterization using optical spectroscopies and X-ray diffraction.
Main Results:
- BE solvent yielded larger CsPbBr3 nanoplatelets (∼9 nm) than ODE (∼5 nm) via MWI.
- Hot-injection also showed morphological differences, with BE producing thinner platelets.
- BE demonstrated higher solubility for lead bromide precursors compared to ODE.
Conclusions:
- Solvent choice significantly impacts CsPbX3 nanoplatelet size and morphology.
- Higher precursor solubility in BE drives the formation of larger, anisotropic structures.
- Understanding solvent-precursor interactions is key for controlled synthesis of halide perovskite nanomaterials.
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