Themed collection Perovskites: from materials science to devices

The use of perovskite-based nanomaterials in smartphone sensors, which enhance accessibility and efficiency in health diagnostics, and their potential in the integration with wearable technology for improved health monitoring is explored.

This work demonstrates the utilization of MXenes as a hole transport interfacial layer for performance and stability improvement in regular device (n–i–p) structures.

Mixed ionic-electronic conduction is revealed in Dion–Jacobson (DJ) and Ruddlesden–Popper phases based on aromatic spacer cations, with higher activation energies for ion migration and thermal stability for DJ systems, relevant to their application.

Ambient solution-processed halide perovskite thin films are susceptible to oxygen and moisture. Composition and morphology control of the films via anti-solvents treatment, i.e., DCB, EtOH, and CB affect their crystallization and solar cell performance.

Synthesis conditions determine the dimensionality of TEA–Sn perovskites from low emissive 2D structures to highly luminescent 0D structures. Br-derivatives can be tuned to form 0D and 2D structures, 0D Cl and 2D I-based cannot be dimensional tuned.

This work presents a novel perovskite thin film fabrication approach based on an optical in situ spectroscopy setup and a live closed-loop feedback system to improve the reproducibility of the layer properties independent of external parameters.

Hybrid MAPbBr₃ quantum dot cellulose papers are fabricated via a one-step, oleic acid/oleylamine-free vacuum filtration method, and the corresponding photodetectors demonstrate self-powered capability, high flexibility, and exceptional stability.

In this work, formamidine acetate (FAAc) was introduced in the two-step method to regulate perovskite crystallization and passivate defects, which resulted in achieving the PCE of device exceeding 24% with notable improvements in stability.

Thermal degradation experiments in GA_xFA_yMA_1−x−yPbI₃ perovskites show that mixed compositions are generally more stable, but not always. Large GA⁺ cations may decrease the stability and even change the order of the degradation kinetics.

The structural behaviour of CsCaCl₃ has been investigated using neutron diffraction as a function of pressure and temperature.

Metal co-doped cesium manganese halide nanocrystals are synthesized to enhance the red emission depending on the transitional role of Tm³⁺ ions, and realize tunable red emission from 660 nm to 628 nm by controlling the Pb doping contents.

The addition of a 1-butyl-3-methylimidazolium bromide (BMIB) ionic liquid to the MAPbBr₃ precursor solution shows a significant influence on the crystal optoelectronic properties and photodetection performance.

Demonstration of how rational design affects self-trapped emission characteristics and scintillation properties in mechanochemically synthesised caesium copper halide perovskites.