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Nanostructured trimetallic phosphide electrocatalysts are promising for H2 and O2 evolution reactions (HER/OER) that are actively pursued nowadays to achieve commercial hydrogen production. Herein, a dual-functional Nb-doped NiFe phosphide nanosheet...

Compared with organic–inorganic hybrid perovskites, fully inorganic perovskites show an increased stability and are therefore attracting considerable attention, especially in recent years. Such materials are not only being extensively used in applications such as solar cells and light-emitting diodes, but also show great potential as photodetectors due to their exceptional optoelectronic properties. In this review, the recent progress on emerging photodetectors based on inorganic perovskites is comprehensively summarized, focusing on the versatile compositions and morphologies of constituent materials and diverse device architectures, and covering the sensing regions from UV–visible–NIR to x-ray and even gamma-ray. A brief outlook that highlights the current challenges impeding the commercialization of inorganic perovskite-based photodetectors is also included, and possible solutions to these problems are provided.

High brightness of upconversion luminescence (UCL) for a thinner layer of UC nanoparticles is significant for routine applications of effective trademark anticounterfeiting technology. In this work, efficient UCL of NaYF:Yb,Er/Tm was realized by combining a TaO dielectric layer on the cyclical island silver films supported by poly(methyl methacrylate) opal photonic crystals (PCs). The synergistic modulation of localized surface plasmon resonance and PC effect results in a significant improvement of the local electromagnetic field and an optimum UC enhancement of 145 folds. Furthermore, colorful pattern nanoprinting has been applied to this composite and used for trademark anticounterfeiting. The combination of angle-dependent PC effect and infrared-to-visible UCL represents a more advanced anticounterfeiting technique.