Highly efficient warm white light emission in Sb³⁺-doped (NH₄)₄CdCl₆metal halides through A-site Rb-alloying regulation

Abstract

Lead based mental halides are widely investigated and applied in many fileds such as light emitting diodes (LED), Photovoltaic devices, sensor and solar cells etc. for their superior optical properties....

Multiexcitonic Emission of Organic–Inorganic (C4H12N)2ZrCl6:Sb3+ Perovskites across the Full Visible Region for Anticounterfeiting Applications

“…Such a large S and binding energy indicate that the low-energy emission at 660 nm was attributable to stable STEs emission with highly localized behavior. 29,30 Accordingly, Figure 4f reveals a possible PL mechanism for (TMA) 2 ZrCl 6 :Sb 3+ . Upon high-energy excitation at 250 nm, the electrons are excited to the excited state of the (TMA) 2 ZrCl 6 host.…”

Excitation-dependent efficient photoluminescence in an organic–inorganic (C4H12N)2HfCl6 perovskite induced by antimony doping

“…46 The temperature-dependent full width at half-maximum (FWHM) can be fit to determine the Huang–Rhys factor ( S ), which reflects the electron–phonon coupling strength. The following equation relates S and FWHM: 47,48 where ℏ ω phonon denotes the phonon frequency and k B denotes the Boltzmann constant. Fig.…”

Spectral Tunability, Luminescence Enhancement, and Temperature Sensitivity of Sb3+-Doped Bismuth-Based Halide Emission Crystals for Anti-Counterfeiting Applications

“…The luminescence of STE is significantly influenced by the crystal environment. ,, By partial replacement of A-site Rb + with Cs + , the crystal field is modified, thereby tuning the luminescent properties of STE. As a result, the luminescence of Rb 3– y Cs y Bi 0.88 Cl 6 :12%Sb gradually increased with the substitution of Cs + , reaching its maximum intensity when the Cs + substitution level was 0.60 (Figure b).…”

“…20 Similarly, A-site Rb alloying in zerodimensional (0D) Sb 3+ -doped (NH 4 ) 4 CdCl 6 halides has led to tunable warm white light emission while improving the PLQY from 62% to 71%. 21 The sensitivity of luminescent materials to changes in the surrounding environment offers potential applications in anticounterfeiting measures. Hydrochromic CsPbBr 3 @mesoporous silica nanospheres, for example, undergo a reversible transition between luminescent CsPbBr 3 and nonluminescent CsPb 2 Br 5 upon exposure/removal of water, making them suitable for anti-counterfeiting purposes.…”

“…Achieving precise control over spectral tuning and understanding the underlying composition-dependent luminescence mechanisms are ongoing research endeavors. Doping/alloying with metal cations in perovskite structures has emerged as a promising approach to tailor the properties of halide-based inorganic phosphors, offering improved efficiency and stability. − The addition of a small amount of Rb + into Cs 2 ZrCl 6 :Te 4+ has been found to enhance its PL intensity and moisture stability . Similarly, A-site Rb alloying in zero-dimensional (0D) Sb 3+ -doped (NH 4 ) 4 CdCl 6 halides has led to tunable warm white light emission while improving the PLQY from 62% to 71% …”