Method to determine radiative and non-radiative defects applied to AgInS2–ZnS luminescent nanocrystals
文献信息
G. Le Blevennec, F. Chandezon
The systematic measurement of the photoluminescence quantum yield and the recombination lifetime of a given phosphor allows for the quantification of both radiative and non-radiative recombination rates. This analysis therefore separates the two types of phenomena influencing the quantum efficiency of the phosphor. When associated with other materials characterizations, this powerful tool allows for the determination of the relationship between the structural properties and the efficiency of the photoluminescence process. This article presents this method and its direct application to emerging luminescent quaternary semiconductor nanocrystals. First, the direct effect of disorder on non-radiative recombination rate is demonstrated. Then, strong evidence concerning the nature of the donor and acceptor defects involved in the photoluminescence process of these materials are obtained using XPS.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.




