Te⁴⁺-Doping Rubidium Scandium Halide Perovskite Single Crystals Enabling Optical Thermometry

Abstract

Zero-dimensional (0D) metal halides have attracted extensive attention due to their excellent optoelectronic properties. Doping is one of the effective strategies to enhance the optical properties of metal halides. Here, we prepared 0D Te4+-doped Rb2ScCl5·H2O single crystals by a facile hydrothermal method. Te4+ doping changes the original Rb2ScCl5·H2O emission band, resulting in a broadband orange emission with a full width at half-maximum of 146 nm. Detailed spectroscopy and fast femtosecond transient absorption measurements indicate that the orange light emission comes from triplet self-trapped excitons. In addition, the fluorescence lifetime of the Rb2ScCl5·H2O:Te4+ single crystal has a strong temperature dependence because Te4+ with the 5s2 electron configuration is more sensitive to temperature. The maximum relative sensitivity (S R ) of 3.53% K–1 for this single crystal occurs at 310 K, and the average absolute sensitivity (S A ) in the sensitive temperature range 240–320 K is 48.06 ns K–1, indicating potential applications in optical thermometry.

Dual Emission in Organic–Inorganic (C4H12N)2HfCl6 Perovskites via the Invocation of Bi3+/Te4+ Octahedron Clusters

“…31,45 Similar, wavelengthdependent PL spectra in Figure 3c also identified the single luminescence center of Te 4+ . 27,39,46 Bi 3+ /Te 4+ -codoped sample exhibited excitation and emission regions from each of Bi 3+ and Te 4+ , enabling emission from their respective luminescent centers (Figure 3b). These results demonstrate unambiguously that the blue and yellow emissions are from intrinsic properties.…”

“…The PL properties of Bi 3+ -doped, Te 4+ -doped, and Bi 3+ /Te 4+ -codoped (C 4 H 12 N) 2 HfCl 6 were compared via PL vs PLE mapping in Figure a – c. The wavelength-dependent PL spectra of (C 4 H 12 N) 2 HfCl 6 :1%Bi 3+ showed negligible variation (Figure a), indicating that the blue emission originates from the single luminescence center of Bi 3+ . , Similar, wavelength-dependent PL spectra in Figure c also identified the single luminescence center of Te 4+ . ,, Bi 3+ /Te 4+ -codoped sample exhibited excitation and emission regions from each of Bi 3+ and Te 4+ , enabling emission from their respective luminescent centers (Figure b). These results demonstrate unambiguously that the blue and yellow emissions are from intrinsic properties.…”

Lead-free hybrid indium perovskites with near-unity PLQY and white light emission using an Sb3+doping strategy

“…This has also been found in other low-dimensional light-emitting halogenated materials based on STEs, because the thermal expansion of the lattice caused by the increase in temperature leads to a distortion of the lattice and a reduction of the band gap. 55,56 Of course, it may also be the dominant effect of electronic coupling. The CIE coordinates shown in Fig.…”

Reversible Luminescent Switching Induced by Heat/Water Treatment in a Zero-Dimensional Hybrid Antimony(Ⅲ) Chloride

“…In addition, 0-D IOMHs may own soft lattice and strong electron–phonon coupling, thus leading to interesting photoluminescent properties, including broad emission and large Stokes shift [ 10 ]. As a result, the applications of photoluminescent 0-D IOMHs have flourished in light-emitting diode [ 11 , 12 , 13 , 14 , 15 ], X-ray scintillator [ 16 , 17 , 18 ], remote thermography [ 19 , 20 ], optical waveguide [ 21 ], anti-counterfeiting [ 22 , 23 , 24 , 25 , 26 ], as well as sensor [ 27 , 28 , 29 , 30 ].…”