Mid-Infrared Luminescence of the High Stability Perovskite CsPb_1–xEr_xBr₃-ZrF₄-BaF₂-LaF₃-AlF₃-NaF Fluoride Glass

Abstract

Perovskites have been studied because of their adjustable wavelength range, high color purity, and wide color gamut. However, they still face some problems such as poor stability and insufficient infrared luminescence. The perovskite glass can improve the stability and luminescence properties of the perovskite. In this paper, a highly stable CsPb 1−x Er x Br 3 −ZBLAN fluoride glass with mid-infrared and visible light emission was prepared. The ZBLAN fluoride glass has good inertness, which can improve the stability of the CsPb 1−x Er x Br 3 perovskite. The CsPb 1−x Er x Br 3 −ZBLAN fluoride glass can prevent the perovskite from being destroyed by water, oxygen, and laser. The Er 3+ replaces Pb 2+ to bond with Br − to become the luminescent center of the CsPb 1−x Er x Br 3 −ZBLAN perovskite glass, which extends the luminescence to the mid-infrared region. In addition, its luminescent intensity is significantly higher than those of the ZBLAN− Er glass and CsPb 1−x Er x Br 3 perovskite. After irradiation with a 365 nm UV lamp for 13 h, the luminescence intensity of the CsPb 1−x Er x Br 3 −ZBLAN perovskite glass decreases only by 10%. The EDS spectrum shows that the elements of the CsPb 1−x Er x Br 3 perovskite are uniformly distributed in the glass matrix. The X-ray diffraction spectrum shows that the sample has both the CsPb 1−x Er x Br 3 perovskite phase and the glass phase. This indicates that CsPb 1−x Er x Br 3 is well crystallized in the ZBLAN glass matrix. The three parameters calculated by the Judd−Ofelt theory show that the CsPb 1−x Er x Br 3 perovskite can increase the covalency and asymmetry around the rare earth ion Er 3+ . The transmission electron microscope can clearly see the morphological structure of the CsPb 1−x Er x Br 3 perovskite in the ZBLAN glass matrix. The infrared Fourier transform spectroscopy shows that the sample has lower phonon energy. This proves that the sample has good infrared luminescence characteristics. Finally, the visible and infrared light sources were prepared. Under the irradiation of the 365 nm ultraviolet lamp and 980 nm laser, the perovskite glass produces green light and infrared emission. KEYWORDS: CsPb 1−x Er x Br 3 perovskite, fluoride glass, stability, infrared fluorescence, rare earth ion

Broadband 3μm MIR emission from Lead-free perovskite fluorine composite glass and CO2 monitoring in H2 applications

“…The features (covalency and asymmetry) of the local field around rare earth ions are well known to impact their infrared luminescence performance to some extent. The mid-infrared luminescence at 2.7 μm of the CsPb1-xErxBr3 ZBLAN fluoride glass synthesized by Yin et al is four times higher than that of the Er 3+ -doped ZBLAN fluoride glass [20]. In summary, the generation of perovskite microcrystals in the glass matrix can enhance the infrared luminescence of rare earth ions to a certain extent.…”

Lead-Free Double Perovskite Cs2AgIn1–xErxCl6 Fluoride Glass with Highly Stable Mid-Infrared Luminescence for Monitoring CO2 in Hydrogen Energy

“…In the previous work of our group, different rareearth ions were successfully doped into fluoride glass to obtain different wavelengths of mid-infrared luminescence. CsPb 1−x Er x Br 3 perovskite fluoride glass 31 and Cs 3 Bi 2−y Er y Br 9 perovskite fluoride glass 32 have been successfully synthesized and can emit light at 2.7 μm. Their stability and luminescence in the mid-infrared spectrum have been significantly increased.…”

Nano‐Confined Growth of Perovskite Quantum Dots in Transparent Nanoporous Glass for Luminescent Chemical Sensing

“…Recently inorganic glasses have drawn increasing attention as perovskite QDs matrix owing to their superior optical quality and thermal resistance. [ 21–23 ] The inorganic glass networks could act as a robust host to protect perovskite QDs from the environment effectively and restrain the aggregation and color segregation of perovskite QDs. [ 24 ] The state‐of‐the‐art perovskite glasses are restricted to dense glass medium.…”

“…Recently inorganic glasses have drawn increasing attention as perovskite QDs matrix owing to their superior optical quality and thermal resistance. [21][22][23] The inorganic glass networks could act as a Prior nano-confined matrices for perovskite quantum dots (QDs) dealt only with powders or thin films, which usually suffer from poor handling properties and high transparency limitations for integrating into optical devices. Here, the nano-confined growth of perovskite QDs in an optically transparent, robust, and monolithic matrix by using nanoporous glass (NG) as a nano-reactor is demonstrated.…”