Electroluminescent Nanoparticles: Electroluminescent Guest@MOF Nanoparticles for Thin Film Optoelectronics and Solid‐State Lighting (Advanced Optical Materials 16/2020)

The back-cover illustration (referring to article number 2000670 by Jin-Chong Tan and co-workers) shows a multilayer electroluminescent LED device constructed from a new Guest@MOF composite material, designated as Gaq3@ZIF-8. This light-emitting material is engineered from the nanoscale confinement of a semiconducting metal complex (Gaq3 guest) incarcerated in the cages of a zeolitic metal-organic framework (ZIF-8 MOF), as presented on the right. The protection provided by the MOF host has enhanced the photostability of the composite system. Notably the device is completely free of rare-earth elements which are expensive and toxic to the environment. The prototype LED-MOF device can be switched on by a remarkably low voltage of 3 V.