Effect of self-trapped excitons in the optical properties of manganese-alloyed hexagonal-phased metal halide perovskite

Orange/cyan emissive sensors of Sb3+ for probing water via reversible phase transformation in rare-earth-based perovskite crystals

“…S5†), which is attributed to the reduction of thermally populated vibrational states at a low temperature. 36,37…”

“…S5 †), which is attrib-uted to the reduction of thermally populated vibrational states at a low temperature. 36,37 Coordinative H 2 O as a part of the Sc 3+ octahedron is expected to have an important influence on the PL properties of the Rb 2 ScCl 5 •H 2 O:Sb 3+ crystals. To investigate the effect of coordinative H 2 O, a series of Rb 2 ScCl 5 •H 2 O:Sb 3+ crystals have been sintered at different temperatures for 2 h in air.…”

Cyan-rich sunlight-like spectra from Mn2+-doped CsCd(Cl1−yBry)3perovskites with dual tunable emissions and high stability

“…The detailed mechanism relating to CsCd 1− x Mn x Cl 3 has been well established in previous reports. 25,26 The narrow strong emissions came from the free excitons (FEs) of Mn 2+ (octahedra coordination), 27,28 which originated from the 4 T 1 excited state to the 6 A 1 ground state in the non-complete 3d 5 electronic shell. Fig.…”

“…The τ 2 originated from the 6 A 1 – 4 T 1 transition of the Mn 2+ ions, and the lower lifetime ( τ 1 ) was a consequence of the STEs formation, which was consistent with the results found in a previous report. 25 The different lifetime proves that the cyan and yellow emissions came from different emission centers, providing an accessible way to tune the color-temperature. Fig.…”

High-Throughput Screening on Halide Perovskite Derivatives and Rational Design of Cs3LuCl6

“…The band gap is also relevant to the performance and reliability of optoelectronic devices, especially for indirect types, as phonon-generated heat during energy transition can lead to efficiency losses and thermal degradation. It has hence been controlled through strategies like alloying or doping in optoelectronics applications. − In the case of metal halides, the band gap is mainly determined by the B–X bond and the polyhedral features. Moreover, these crystallographic properties are versatile, depending on the types of metals and anions.…”