Simultaneous enhancement of near infrared luminescence and stability of Cs₂AgInCl₆:Cr³⁺ double perovskite single crystals enabled by a Yb³⁺ dopant

Abstract

Broadband near infrared (NIR) emission materials are of interest for various applications including non-destructive biomedical imaging. In this work, ytterbium ion (Yb3+) were successfully doped into Cs2AgInCl6: Cr3+ (i.e. CAIC:...

Near-infrared emission, energy transfer, and mechanisms of Mn2+ and Cr3+ Co-doped lead-free Cs2AgInCl6 double perovskites

“…The shift of the diffraction peaks is consistent with the phenomenon of lattice contraction, which also indicates that the successfully doped Cr 3+ ions. 34,41 Due to their identical ionic radius and oxidation state, Mn 2+ (r = 0.83, CN = 6) and Cr 3+ ions (r = 0.62, CN = 6) are proposed to substitute In 3+ ions (r = 0.8, CN = 6), generating [CrCl 6 ] 3À and [MnCl 6 ] 4À octahedrons, respectively. 34 Fig.…”

Optical properties of ytterbium-doped and undoped Cs2AgInCl6 thin films deposited by co-evaporation of chloride salts

“…23 A similar enhancement up to 45% PLQY was achieved by substituting Cr 3+ instead of Sb 3+ in Cs 2 AgInCl 6 microcrystals synthesized via hydrothermal synthesis. 24 Codoping with Bi 3+ and Yb 3+ also showed more intense NIR emission than doping with Yb 3+ alone, but no PLQY value was reported. 25 Other reported Yb 3+ co-dopants included Er 3+ for upconversion, 26 and a cocktail of Nd/Yb/Er/Tm/Bi in Cs 2 AgInCl 6 microcrystals for vis-NIR ultra-broadband (400 to 2000 nm) emission with a high PLQY of 40%.…”

Enhancing the inherent NIR photoluminescence in SrLaLiTeO6 through Cr3+–Yb3+ co-substitution for high performance pc-LEDs

“…[47][48][49] Furthermore, double perovskites such as Ca 2 ScTaO 6 :Cr 3+ ,Yb 3+ , Cs 2 AgInCl 6 : Cr 3+ ,Yb 3+ , Ca 2 MgWO 6 :Cr 3+ ,Yb 3+ , and Sr 2 ScTaO 6 :Cr 3+ ,Yb 3+ have been documented as viable options for NIR pc-LEDs. 26,[50][51][52] Even though there are a lot of reports on tellurate-based double perovskites exhibiting efficient photoluminescence in the visible region with excellent thermal stability and high quantum yield, to the best of our knowledge, Cr 3+ and Yb 3+ activated tellurate-based double perovskites have not been reported so far. [53][54][55][56][57] In this article, we also probed the NIR luminescence of the SrLaLiTeO 6 :Cr 3+ ,Yb 3+ phosphor for the first time.…”