RGB tri-luminescence in organic–inorganic zirconium halide perovskites

Abstract

Materials with two or more fluorescence under different excitation sources have great potential in optical applications, but luminous materials with three emission characteristics have been largely undeveloped. Here, we report...

Ultrafast Visual Detection of a Trace Amount of Water by Highly Efficient Hybrid Manganese Halides

“…Compared with traditional analysis methods, portable sensor technology has attracted more attention due to its multiple advantages such as ease of manufacturing, miniaturization, low cost, fast response time, and real-time monitoring. − Compared with conventional electrochemical sensing methods, a visual fluorescence probe is capable of detecting water in a highly efficient, simple, and rapid way with high sensitivity and selectivity. − Until now, various kinds of semiconducting luminescent materials have been explored as fluorescence probes toward water including organic fluorophore, metal–organic complex, carbon dots, conjugated polymer, and rare-earth doped metal oxides, etc. − In recent years, organic–inorganic metal halides (OIMHs) have been demonstrated as new-generation luminescent materials owing to their excellent photoluminescence (PL) performance with ultrahigh quantum yield, excellent thermal stability, and low self-absorption performance in the state of aggregation, which have received increasing attention in solid-state display and lighting diodes. − Benefiting from the various kinds of organic species and enormous arrangement mode in the crystalline structure, the OIMHs display diverse and adjustable crystal structures, which further increase the possibility of colorful PL properties. − Especially, the weak bonding energy and soft structural scaffold of the ionic metal halide network enable the structures of OIMHs to be sensitive to various external physical and chemical stimuli including pressure, temperature, light, radiation, humidity, water, oxygen, pH, organic molecules, metal ions, etc. − As a result, these combined merits of abundant and impressible structures, facile structural transformation, and high sensitivity luminescence response toward external stimuli endow the OIMHs with various reversible and dynamic structure-associated PL switching phenomena, such as mechanochromism, thermochromism, photochromism, hydrochromism, vapochromism, etc. − Therefore, the OIMHs are capable of being explored as promising fluorescence probes for external stimuli with good selectivity and accuracy. For example, the zero-dimensional (0D) OIMH of [MP] 2 In x Sb 1– x Cl 7 ·6H 2 O single crystal exhibits a reversible and specific methanol-responsive luminescence switching, which can be used as a fluorescent probe to detect trace amounts of methanol in ethanol .…”