Themed collection Halide Perovskite Nanocrystals

This themed issue includes a collection of articles on halide perovskite nanocrystals.

We report on the progress, challenges and future directions of blue perovskite light-emitting diodes to facilitate their further development.

In this topical review, we have focused on the recent advances made in the studies of lead-free perovskites in the bulk form and as nanocrystals. We highlight how nanocrystals can serve as model systems to explore the schemes of cationic exchange, doping and alloying for engineering the electronic structure of double perovskites.

Surface defects and environmental conditions affect the physical properties of CsPbBr₃ perovskites differently, based on the materials dimensionality, despite their ‘defect tolerant’ electronic structure.

FAPbBr₃ crystals were stabilized by the endotaxy passivation by FA₄PbBr₆ during high pressure compression.

The growth of colloidal perovskite precursors by changing chemical composition, concentration and the impact on resultant thin-film morphologies is explored.

Internanocrystal halide exchange between CsPbX₃ perovskite nanocrystals and cesium based non-perovskite nanocrystals has been studied for the first time.

An innovative nanorotor based on halide perovskite nanorods is proposed here. The HP nanorods are suspended in a non-conductive fluid and a rotating electric field is applied. When light is applied, photogenerated charge carriers will enhance the electric torque produced by the rotating field which eventually overpowers the Brownian motion and forces the nanorods to rotate.

A facile metal ions-assistant ligand surface engineering strategy to synchronously boost photoluminescence quantum yield and stability of CsPbBr₃ PQDs.

0-Dimensional (0D) CsPbBr₃ QDs were integrated with 2D bismuthene to obtain a 0D/2D nanohybrid with tunable charge transfer efficiency.

A facile and easily scaled-up ligand assisted precipitation route has been reported to produce highly photoluminescent and stable dual-phase CsPbBr₃–CsPb₂Br₅ NCs for improving the stability of PeLEDs.

The oxidation state of the Au ions determines whether cation exchange or gold deposition occurs when an Au salt is added to solutions of all-inorganic cesium lead halide perovskite nanocrystals.

CsPbBr₃ nanoplatelets are synthesized with fine control over size, thickness and optical properties. In situ photoluminescence measurements are used to optimize platelet growth.

We demonstrate state of the art polymer-perovskite microcavities obtained by protecting the polymer photonic structure from a broad-range perovskite solvent with a perfluorinated layer.

Bright blue-emitting 2D layered perovskites based on single octahedral planes are fabricated with different spacer molecules, and acetone as solvent.

Recently, single-walled carbon nanotube (SWNT) films have been regarded as a promising channel material for flexible photodetectors due to their high intrinsic carrier mobility, conductivity, and mechanical flexibility.

Halide perovskite nanoparticles with sizes larger than 20 nm have demonstrated pronounced nonlocal excitonic properties governed by Mie modes.

This study highlights the importance of a scalable blade coating technique and the ion exchange reaction in fabricating high-quality perovskite thin films.

Manganese ions were incorporated into CsPbX₃ nanocrystals with their morphology and size preserved using a photo-induced post-synthesis doping method.

A ligand and Cs⁺ were introduced to reduce the solubility between precursors and polymers, resulting in highly luminescent composite films.

Postsynthesis Mn-doping elucidates the role of lattice contraction and surface passivation in stabilizing the black phase of CsPbI₃ nanocrystals under ambient conditions.

The origin of the luminescence properties of CsPb₂Br₅ is ascribed to the presence of different amorphous lead bromide amine complexes.

A novel high concentration doping method, Cs₄PbBr₆ reacting with MBr₂ (ZnBr₂, MnBr₂, EuBr₂) and transforming to CsPb_xM_1−xBr₃ nanocrystals, was developed.

A reversible fluorescence switching of CsPbI₃ nanocrystals (NCs) was realized using photosensitive AgI NCs under light on/off and applied for a rewritable platform.

Three different emission centers with different photoluminescence lifetimes were identified in CsPb₂Br₅ microplates with the primary contribution from embedded CsPbBr₃ nanocrystals.

Electron injection from perovskite to planar TiO₂ accelerates with chloride addition, in mesoporous TiO₂ carrier recombination is slowed.

Room-temperature high performance tetrahedral microlasers based on CsPbBr3 perovskite single crystals with triangular symmetry are demonstrated.

Co-doping of cation (La³⁺) and anion (F⁻) ions is a feasible method to improve the optical properties of CsPbCl₃ QDs, and high photoluminescence quantum yield of 36.5% is achieved in CsPb(Cl_0.7F_0.3)₃:La³⁺ QDs.

Highly stable enhanced near-infrared amplified spontaneous emission in solution-processed perovskite films by employing polymer and gold nanorods.

An amine-free method is used to systematically investigate the role of Cs, Pb and Br in hot-injection synthesis.

Lead halide perovskite nanocrystals have recently demonstrated promising nonlinear optical properties such as strong two-photon absorption, three-photon absorption, four-photon absorption and their respective cross-sections.