Lattice Doping of Lanthanide Ions in Cs ₂ AgInCl ₆ Nanocrystals Enabling Tunable Photoluminescence

Abstract

Lead-free halide double perovskite Cs2AgInCl6 has become the research hotspot in the optoelectronic fields. It is a challenge to utilize the lattice doping by different lanthanide ions with rich and unique photoluminescence (PL) emissions for emerging photonic applications. Here, we successfully incorporated Dy3+, Sm3+, and Tb3+ ions into Cs2AgInCl6 nanocrystals (NCs) by the hot-injection method, bringing diverse PL emissions of yellowish, orange, and green light in Cs2AgInCl6:Ln3+ (Ln3+ = Dy3+, Sm3+, Tb3+). Moreover, benefiting from the energy transfer process, Sm3+ and Tb3+ ion-codoped Cs2AgInCl6 NCs achieved tunable emission from green to yellow orange and a fluorescent pattern from the as-prepared NC-hexane inks by spray coating was made to show its potential application in fluorescent signs and anticounterfeiting technology. This work indicates that lanthanide ions could endow Cs2AgInCl6 NCs the unique and tunable PL properties and stimulate the development of lead-free halide perovskite materials for new optoelectronic applications.

Polarized Emission of Lanthanide Metal–Organic Framework (Ln‐MOF) Crystals for High‐Capacity Photonic Barcodes

“…A PLQY of 21.56% and lifetime (τ = 0.85 ms) of Eu-BTC crystals were also measured at room temperature (Figure S5, Supporting Information), this PLQY value is higher than that of pure inorganic lanthanide crystals due to the "antenna effect". [28][29][30][31][32] Thanks to the unique and sheltered 4f n electronic configurations of lanthanide elements, [8,13,20] the lanthanide-based materials with appropriate site symmetries can induce linearly polarized luminescence, which is of great significance for various optical applications. [14][15][16]21,33] Being different from widely explored polarized emission behavior in low-dimensional www.advopticalmat.de materials with anisotropic crystal structures, our Eu-BTC crystals possess both highly anisotropic crystal structure and lowsymmetry energy level splitting of Eu 3+ by the crystal field, thus the Eu-BTC crystals are expected to show superior polarized luminescence features.…”

Advances in Electrostatic Spinning of Polymer Fibers Functionalized with Metal-Based Nanocrystals and Biomedical Applications

“…(4) Hybrid NCs, such as Au/semiconductors hetero-NCs with plasmon enhancement, could also exhibit unique biomedical applications when coupled with nanofibers, such as multi-level enhanced chemodynamic, sonodynamic and therapy applications, based on their sonosensitizers and photodynamic functionalities [ 49 , 50 , 51 , 52 , 105 , 106 , 107 , 108 , 109 ]. It is believed that with the further development of multi-functional inorganic NC/polymer fibers, electrostatic spinning technology will become one of the most widely used technologies in the medical field.…”

Pressure-Driven Abnormal Emission Blue-Shift of Lead-Free Halide Double Perovskite Cs2AgInCl6 Nanocrystals

“…Additionally, doping significantly modified the optical and electric properties of the halide DP nanocrystals. The Yb- and Er co-doped Cs 2 AgInCl 6 DP nanocrystals retained their structural integrity and exhibited infrared emissions from their 4f orbital energy levels. − Ho 3+ -doped Cs 2 (Na,Ag)­InCl 6 exhibited intense warm white emissions, as well as the characteristic emission of Ho 3+ ions …”