A Novel Ba₂LuNbO₆:Mn⁴⁺Double-Perovskite Far-Red Phosphor for Indoor Plant Cultivation

Abstract

Far-red light is very important for plant photomorphogenesis. Herein, we report a novel Ba 2 LuNbO 6 :Mn 4+ far-red phosphor by high temperature solid state method. Its crystal structure and optical property are systematically studied. The as-fabricated Ba 2 LuNbO 6 :Mn 4+ phosphor exhibits broad excitation bands ranging from 300 to 550 nm, attributed from the d-d transitions of Mn 4+ , and emits expected far-red light with the center of 698 nm ( 2 E g → 4 A 2g ) under 370 nm UV irradiation. Furthermore, the temperature-dependent photoluminescence (PL) intensity and the activation energy of Mn 4+ are investigated in detail. A far-red pc-LED is fabricated by combining the Ba 2 LuNbO 6 :Mn 4+ and 365 nm UV chip, showing a good overlap with the absorption data of phytochrome P FR . Surprisingly, by introducing secondary cation ion Gd 3+ , the far-red PL intensity is obviously enhanced because of crystal field adjusted and nephelauxetic effect. Finally, our work supplies a novel far-red candidate phosphor for indoor plant cultivation.

Self-Organized Nanocomposite Structure Controlled by Elemental Site Occupancy to Improve Vortex Pinning in YBa2Cu3O7 Superconducting Films

“…in the YBCO films prepared using pulsed laser deposition (PLD). Also, in the metal organic deposition, various second phase materials have been investigated to control the nanostructure and vortex pinning. − The lattice parameter of Ba 2 RENbO 6 (BRNO; RE = Yb, Lu) is almost the same as that of BMO (M = Zr, Hf). , From this point, the incorporation of BRNO is very promising due to the degrees of freedom for the selection of RE the element. The RE distribution and the site occupancy of the RE element in the nanorods are the parameters that do not exist in the YBCO+BMO systems.…”

Quantitative Dual-Energy X-ray Imaging Based on K-Edge Absorption Difference

“…Bearing the physical picture in mind, we engineered dual-energy scintillators, using two emerging metal halide materials, C 4 H 12 NMnCl 3 − and Cs 3 Cu 2 I 5 , − as illustrative examples for absorbing soft and hard X-rays, respectively, as shown in Figure a. Cs 3 Cu 2 I 5 was synthesized using the conventional antisolvent method, while C 4 H 12 NMnCl 3 was prepared by adding a small quantity of hydrochloric acid (HCl) .…”