Publication date: 15th December 2025
The structural and compositional modifications of CsPbX3 (X = Cl, Br, I) nanocrystals have been extensively studied for applications such as tailoring optical properties and constructing superlattices. However, the facile synthesis of hollow structured CsPbX3 nanocrystals remains challenging. Here, we report a simple method to synthesize core@shell AgBr@CsPbBr3 nanocubes, which serve as templates for producing single-phase hollow CsPbX3 (X = Cl, Br, I) nanocubes through sequential halide anion exchange reactions. Exchange with Cl⁻ ions leads to Ag@CsPbCl3, whereas exchange with I⁻ ions results in hollow CsPbI3 cubes due to the I⁻ etching of the AgBr core. These hollow CsPbI3 nanocubes can subsequently be transformed into hollow CsPbBr3 and CsPbCl3 nanocubes via adjacent halide exchanges. Controlled adjacent halide exchanges (I → Br and Br → I) consistently yield alloyed CsPb(I:Br)3 and CsPb(Br:Cl)3 nanocubes. Notably, more complex heterostructures, including CsPbI3-CsPbCl3 and CsPbCl3@CsPbI3, are formed during jump halide exchanges (I → Cl and Cl → I). In the CsPbI3-CsPbCl3 heterostructure, CsPbCl3 domains, primarily located at the corners, share epitaxial interfaces with CsPbI3 domains within a single hollow nanocube. In the CsPbCl3@CsPbI3 heterostructure, CsPbI3 layers propagate on the surface, forming a core@shell geometry in a single perovskite nanocube. This discovery provides a platform for exploring the electronic and optical properties of heterostructures featuring epitaxial domains with photoluminescence emissions spanning different regions of the visible spectrum.
Manna, L. acknowledge funding from European Research Council through the ERC Advanced Grant NEHA (grant agreement n. 101095974). Li, Z. acknowledges funding from Horizon Europe through the MSCA-PF agreement no. 101150406 (SPUREPER).
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.