Pr³⁺/Yb³⁺:PLZT ferroelectric ceramics for near‐infrared radiation at 1340 nm

Abstract

The near-infrared luminescence properties of Pr 3+ /Yb 3+ :PLZT ferroelectric ceramics have been examined for the first time. Independently, upon either 450 nm (Pr 3+ ) or 980 nm (Yb 3+ ) excitation, luminescence centered at 1340 nm was observed, which corresponds to the 1 G 4 ? 3 H 5 transition of Pr 3+ . Several spectroscopic parameters for the 1 G 4 ? 3 H 5 transition of Pr 3+ ions were determined. The average product of emission cross section and radiative lifetime were relatively large for all x/65/35 PLZT samples (x=6-10) studied, with values close to 105AE2 (910 À26 cm 2 Ás). These spectroscopic investigations indicate that Pr 3+ /Yb 3+ :PLZT ferroelectric ceramics are promising candidate for efficient sources emitting nearinfrared radiation at 1340 nm. K E Y W O R D Snear-infrared luminescence, PLZT ceramics, rare-earth ions

Efficient and Stable Multicolor Emissions of the Coumarin‐Modified Cs3LnCl6 Lead‐Free Perovskite Nanocrystals and LED Application

“…These included the 1 D 2 -3 F 4 and 1 G 4 -3 H 5 transitions for Pr 3+ , 4 F 3/2 -4 I 11/2 and 4 F 3/2 -4 I 3/2 transitions for Nd 3+ , 4 G 5/2 -6 H J(5,7,9)/2 transition for Sm 3+ , 5 D 0 -7 F J(1,2,3,4) transition for Eu 3+ , 5 D 4 -7 F J (6,5,4,3) transition for Tb 3+ , 4 I 13/2 -4 I 15/2 transition for Er 3+ , and the 2 F 5/2 -2 F 7/2 transition for Yb 3+ , respectively. [31,[41][42][43] To assess the effect of EHC on defect passivation, we measured the PLQY of EHC@Cs 3 LnCl 6 NCs. The introduction of EHC molecules notably increased the overall PLQY of Cs 3 LnCl 6 NCs compared to Cs 3 LnCl 6 NCs without EHC (Figure 3b and Figure S12 (Supporting Information)).…”

Microstructure and Properties of the Ferroelectric-Ferromagnetic PLZT-Ferrite Composites

“…Similarly to the commonly-used modified PZT materials, compositional changes within the PLZT material can significantly alter the electrophysical properties thereof. PLZT materials have very good dielectric, ferroelectric, and piezoelectric properties which allow the usage of the PLZT-type material in a variety of applications [25][26][27][28][29].…”

Microstructural, ferroelectric, and photoluminescent properties of (100)‐oriented Sm3+‐doped Na0.5Bi0.5TiO3 thin films

“…Multifunctional materials featuring ferroelectric and photoluminescent properties in a single entity have attracted increasing interest of scientific world and industry attention in recent years, because of their outstanding coupling of electrical and optical properties, which may cause their promising applications in the miniaturized and integrated microelectronic devices like sensors, actuators, and displays . On the other hand, researchers are trying to replace lead‐containing ferroelectric materials by lead‐free materials to protect the environment from pollution.…”