Research Topic

Two-Dimensional Halide Perovskite Nanomaterials for Solar Energy Conversion

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About this Research Topic

As an emerging class of two-dimensional (2D) materials, layered organic-inorganic hybrid halide perovskites have become increasingly prevalent in the past several years due to their high photoluminescence quantum efficiency, abundant and tunable optoelectronic properties, great defect tolerance, and solution ...

As an emerging class of two-dimensional (2D) materials, layered organic-inorganic hybrid halide perovskites have become increasingly prevalent in the past several years due to their high photoluminescence quantum efficiency, abundant and tunable optoelectronic properties, great defect tolerance, and solution processability. A great variety of 2D halide perovskites have been successfully synthesized so far, and the related devices, including solar cells and light-emitting diodes, were reported to possess better stability. In addition, these 2D perovskites form quantum wells composed of periodically repeating organic and inorganic layers along the out-of-plane direction. The emergence of 2D halide perovskites provides plenty of opportunities not merely to explore novel physics and structures, but also to develop high-performance and highly stable solar cells and optoelectronic devices.

Compared to their three-dimensional counterparts, 2D halide perovskites generally have larger compositional /structural tunability and better stability. However, most of the organic ligands for 2D halide perovskites were focused on electrically insulating aliphatic or aromatic organic ligands, which block the carrier transport along the out-of-plane direction. In addition, the encapsulation and protection from the relatively small organic ligands is far from satisfactory. Therefore, it is highly desirable to design novel 2D halide perovskites and fabricate related optoelectronic devices (e.g. solar cells, light-emitting diodes, etc. ) with better stability and improved carrier transport properties through molecular or compositional engineering. The goal of this Research Topicis is to call upon further researches toward new materials and processing design for highly efficient and stable 2D perovskite for solar energy conversion and related applications.

Topics of interest include, but are not limited to:

• Synthesis, characterizations, and theoretical modeling of novel 2D halide perovskite nanomaterials with improved stability or enriched functionalities.
• Construction of heterostructures, including lateral and van der Waals heterostructures between different types of 2D halide perovskites and van der Waals heterostructures between 2D halide perovskites and other semiconductors for energy harvesting.
• Energy conversion devices based on 2D halide of perovskite nanomaterials, such as solar cells, solar-driven water-splitting devices, light-emitting diodes, etc.
• Fundamental studies based on 2D halide perovskite nanomaterials and devices, such as stability, ion migration, degradation mechanism, charge/exciton behaviors across interface, etc., with a focus on energy conversion efficiency


Keywords: 2D Halide Perovskites, Solar Energy, Nanomaterials, Spectroscopy, Charge Transport


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