Controversy about the Origin of the Broad Emission Band in Photoactive Perovskite Materials
A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".
Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 4470
Special Issue Editors
Interests: perovskite nanoparticles; gold nanoclusters; upconversion nanomaterials; hybrid nanomaterials; photocatalysis
Special Issues, Collections and Topics in MDPI journals
Interests: photoactive nanoparticles; quantum dots; surface chemistry; perovskites nanomaterials; photochemistry; photocatalysis
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Metal halide perovskites have attracted great attention in lighting due to their excellent photophysical properties: broad absorption range; high absorption coefficient; a characteristic narrow emission band assigned to the direct exciton recombination, and a small energy shift between the absorption and emission peak positions. These materials can also exhibit a broad and strong Stokes-shifted emission, which is relevant for white-light generation. There is some controversy about the origin of this broad emission, and it has been ascribed to self-trapped excitons (STE) due to the strong carrier–phonon interactions, and/or to defect/impurity-bound excitons in-gap states.
This Special Issue will report on how to prepare customized emissive perovskite materials by providing experimental and theoretical studies that can help to understand the relationship between the observed broad emission and the perovskite’s dimensionality, composition, and crystal structure distortion. This knowledge will boost the development of efficient, broad-emissive perovskites of interest for white-light illumination, among other applications.
We encourage authors to submit studies related to this topic, involving lead and lead-free halide perovskites (solids and colloids) of different dimensionality (3D, 2D, 1D, and 0D) and composition, as well as metal-doped perovskites. It is highly recommended that authors include photoluminescence efficiency, as well as thermal, chemical, and photochemical stability information of the materials. Original contributions and/or perspectives are welcome.
Prof. Dr. Julia Pérez-Prieto
Dr. Raquel E. Galian
Guest Editors
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Keywords
- Self-trapping exciton
- Defect-assisted emission
- Exciton recombination
- Photoluminescence efficiency
- Theoretical calculation
- Crystal structure dimensionality
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