High-efficiency blue photoluminescence in the Cs₂NaInCl₆:Sb³⁺ double perovskite phosphor

Abstract

The halide double perovskite Cs2NaInCl6 doped with Sb3+ is shown to be a promising blue phosphor.

Photoluminescence of Singlet/Triplet Self‐Trapped Excitons in Sb3+‐Based Metal Halides

“…[ 38 ] Therefore, Sb 3+ doping into double perovskite is an alternative means to achieve an efficient STEs luminescence. [ 4l,m,39 ] The earliest reports can be tracked back decades ago, such as the reports of Sb 3+ ‐doped Cs 2 NaMX 6 (M = Sc, Y, La; X = Cl, Br). [ 40 ] Sb 3+ ion in these compounds is surrounded by six chloride ions, forming SbCl 6 3− octahedron as a result of substitution of trivalent ions.…”

Lead‐Free Halide Double Perovskites: Structure, Luminescence, and Applications

“…Theatrically, to obtain deep blue STEs, the distortion degree of the B–X octahedral should be decreased with delicate component engineering to eliminate the existence of outer s 2 electrons. [ 173,174 ] Zhao and coworkers reported a class of blue‐emitting HDPs for the first time. [ 75 ] They fabricated Cs 2 AgSbX 6 colloidal NCs using a surfactant‐assisted method and shifted PL peaks from 409 to 557 nm.…”

Lead‐Free Halide Double Perovskite Nanocrystals for Light‐Emitting Applications: Strategies for Boosting Efficiency and Stability

“…[ 68 ] prepared WLED devices via mixing the silane coupling agent encapsulated Bi 3+ doped Cs 2 ZrCl 6 HDP materials, green Y 3 (Ga, Al) 5 O 12 :Ce 3+ and red CaAlSiN 3 :Eu 2+ commercial phosphors on the top of a NUV LED chip. The device exhibited CIE color coordinates of (0.37, 0.35), and CRI of 81.9 and CCT of 4179 K. In addition, Gray and co‐workers [ 183 ] employed blue Cs 2 NaInCl 6 :Sb 3+ phosphors with emission at 452 nm and PLQY of 79%, together with green β ‐SiAlON:Eu 2+ phosphors and red Sr 2 Si 5 N 8 :Eu 2+ phosphors on 370 nm UV LED chip, which exhibited CIE color coordinates of (0.3890, 0.4009), CCT of 3972.6 K and CRI of 90.6, making Cs 2 NaInCl 6 :Sb 3+ phosphors as an alternative for commercial blue phosphors ( Figure a,b). Moreover, Wang and co‐workers [ 76 ] fabricated WLED devices by Bi 3+ ‐Ce 3+ co‐doped Cs 2 Ag 0.4 Na 0.6 InCl 6 phosphors with high PLQY as well as blue BaMgAl 10 O 17 :Eu 2+ phosphor.…”

“…Reproduced with permission. [ 183 ] Copyright 2020, The Royal Society of Chemistry. c) Electroluminescence spectra and operating photo of WLED fabricated by different r ( r is the mass ratio of BaMgAl 10 O 17 :Eu 2+ to 1% Bi 3+ ‐1% Ce 3+ doped Cs 2 Ag 0.4 Na 0.6 InCl 6 ).…”