Nanocrystalline structure control and tunable luminescence mechanism of Eu-doped CsPbBr₃ quantum dot glass for WLEDs

Abstract

We design a light-emitting diode based on a novel Eu-doped quantum dot glass material with tunable luminescence properties.

Highly Resolved and Robust Dynamic X‐Ray Imaging Using Perovskite Glass‐Ceramic Scintillator with Reduced Light Scattering

“…This is in contrast with some previous reports of Eu doped CsPbX 3 nanocrystal or glass ceramic, in which the emission intensity of Eu is comparable with or even stronger than that of CsPbX 3 . [ 32,33,38,43–45 ] This discrepancy is likely attributed to our excellent crystallization of CsPbBr 3 promoted by Eu dopant, which makes the band‐to‐band emission of CsPbBr 3 extremely strong, and thereby the Eu intensity seems barely observable. The transparent matrix also serves as inherent protection for perovskite quantum dots.…”

“…In addition, the water soluble lead of perovskite nanocrystal is always a risk to human and environment. [ 13 , 24 ] Growing QDs inside inorganic glass has been proven as an effective strategy to prevent the degradation and enhance the environmental stability of II–VI and IV–VI QDs, [ 25 , 26 , 27 , 28 ] as well as CsPbX3 QDs showing applications in white LED, [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ] lasering, [ 36 ] and 3D laser printing. [ 37 ] Here, to resolve those above concerns, we in situ grew inorganic perovskite QDs inside transparent and robust matrix as a glass‐ceramic (GC) scintillator, which is inexpensive to fabricate and can be easily scaled up.…”

Europium Addition Reduces Local Structural Disorder and Enhances Photoluminescent Yield in Perovskite CsPbBr3

“…Europium-containing inorganic perovskite quantum dots display blue, green, and red emission with photoluminescent yields up to 90%, the red emission arising from quantum cutting between the host lattice and Eu 3+ . [33,34] Strong excitonic binding in these quantum dots makes their PL yield less sensitive to particle size and morphology, allowing bright particles to be formed even within glass melts. [8] Solar cells fabricated with europium additives to the hybrid MAPbI 3 and inorganic CsPbI 3 and CsPbI 2 Br perovskite absorbers displayed increased power conversion efficiency and stability under conditions ranging from exposure to ambient atmosphere to prolonged one-sun illumination.…”

Superior Properties and Biomedical Applications of Microorganism-Derived Fluorescent Quantum Dots

“…Ekimov and Onushchenko investigated the quantum configuration of CuCl-immersed silicate in glass ceramics [ 4 ]. Since then, several investigations have been performed to discover a wide variety of QD-immersed glass ceramics [ 5 , 6 , 7 ]. Glass ceramics containing QDs have gained considerable notice because they can be successfully applied in optoelectronic devices, sensors, and photocatalysts [ 8 ].…”