Themed collection In Memoriam of Prof. Richard T. Williams (May 27, 1946 - July 5, 2021)

Professor Jurchescu, Dr. Wolszczak, Professor Burger, Dr. Bourret-Courchesne, and Professor Dorenbos introduce the Journal of Materials Chemistry C–Materials Advances themed collection in memoriam of Prof. Richard T. Williams.

An overview of recent debate about the origin of green emission in Cs₄PbBr₆ and/or CsPbBr₃ is presented; several possibilities are discussed, including a defect-mediated event in Cs₄PbBr₆ or CsPbBr₃ nano-inclusions embedded within Cs₄PbBr₆.

This manuscript systematically reviews the research progress of novel semiconductor materials in the preparation and application of SCs.

We explore the effect of shell thickness on the time and spectral response of CdSe/CdS core–crown and CdSe/CdZnS core–shell nanoplatelets (NPLs) under X-ray and intense optical excitation.

Large volume cesium lead bromide (CsPbBr₃) perovskite semiconductor radiation detectors match the detection properties of CZT and TlBr but potentially at a lower cost and better stability.

A Czochralski-grown single crystal of GAGG:Ce,Mg allows for a high Ce dopant and Mg codopant concentration in the crystal, resulting in acceleration of scintillation decay down to several nanoseconds at the expense of light yield.

Low temperature optical and scintillation characterisation of PEA₂PbBr₄ single crystals, based on which two potential scintillation mechanisms are proposed.

The effect of phosphorene as co-catalyst in Ti/TiO₂ nanotubes electrodes on CO₂ reduction to methanol, and water splitting was investigated.

Double perovskite materials with large effective atomic numbers and high mass densities generate short absorption length for radiation detection. Bromide and iodide variants were characterized for their scintillation and photodetection properties.

Ionization quenching models were assessed by evaluating light yield data from multiple organic scintillators and recoil ions over a fission spectrum neutron energy range, important for basic science and applications.

Transient optical techniques are exploited to study the origin of accelerated luminescence decay in heavily doped lead tungstate scintillators.

Energy deposition in scintillating screens effects on the high resolution X-ray imaging.

Understanding the scintillation properties of Cu- and Sn-based two-dimensional perovskite crystals while comparing them to those of high-light-yield and fast Pb-based crystals.