Photoluminescence and Scintillation Mechanism of CsPbBr.

Small bandgap scintillators have gained significant attention in recent years. Especially CsPbBr is an interesting material, mitigating the small Stokes shift-related problem of perovskites like CsPbBr. In this work, optical and scintillation properties of CsPbBr single crystals are investigated as a function of temperature, with a detailed focus at 10 K.

Scintillation and Optical Characterization of CsCuI Single Crystals from 10 to 400 K.

Currently only Eu-based scintillators have approached the light yield needed to improve the 2% energy resolution at 662 keV of LaBr:Ce,Sr. Their major limitation, however, is the significant self-absorption due to Eu. CsCuI is an interesting new small band gap scintillator.

Understanding and Preventing Photoluminescence Quenching to Achieve Unity Photoluminescence Quantum Yield in Yb:YLF Nanocrystals.

Ytterbium-doped LiYF (Yb:YLF) is a commonly used material for laser applications, as a photon upconversion medium, and for optical refrigeration. As nanocrystals (NCs), the material is also of interest for biological and physical applications. Unfortunately, as with most phosphors, with the reduction in size comes a large reduction of the photoluminescence quantum yield (PLQY), which is typically associated with an increase in surface-related PL quenching.

Temperature dependent scintillation properties and mechanisms of (PEA)PbBr single crystals.

In this work the scintillation properties of PEAPbBr are studied as function of temperature, accessing the potential use of these materials for low temperature applications. The scintillation properties and mechanism have been studied using a combination of temperature dependent photoluminescence emission and excitation, X-ray excited emission and decay measurements. At room temperature the X-ray excited emission is dominated by the 442 nm emission with a lifetime of 35.