Publications by authors named "Emma H Massasa"
Heterostructures in nanoparticles challenge our common understanding of interfaces due to quantum confinement and size effects, giving rise to synergistic properties. An alternating heterostructure in which multiple and reoccurring interfaces appear in a single nanocrystal is hypothesized to accentuate such properties. We present a colloidal synthesis for perovskite layered heterostructure nanoparticles with a (PbBr)(AMTP)PbBr composition.
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- Lead-free perovskite nanocrystals are appealing for their nontoxicity and potential use in displays, but modifying their optical properties is challenging due to the complexities of exciton emissions.
- This study explores how doping silver-based double perovskite nanocrystals with Bi and Sb can enhance their photoluminescence quantum yield, revealing that the two dopants impact the optical properties in distinct ways due to differences in electronic levels and ionic sizes.
- The findings underscore the significance of ionic size and microstraining, particularly highlighting that Bi's larger size makes its optical properties more sensitive to doping concentration compared to Sb, suggesting ways to optimize these materials for future applications.
Flexible semiconductor materials, where structural fluctuations and transformation are tolerable and have low impact on electronic properties, focus interest for future applications. Two-dimensional thin layer lead halide perovskites are hailed for their unconventional optoelectronic features. We report structural deformations via thin layer buckling in colloidal CsPbBr nanobelts adsorbed on carbon substrates.
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