Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 1896 - 1896
Published: April 22, 2025
Stable and efficient inorganic lead-free double perovskites are crucial for high-reliability optoelectronic devices. However, dual-doped perovskite phosphors often suffer from poor color stability due to differences in thermal activation energies electron–phonon interactions between the doped ions. To address this, single-doped Sb3+-incorporated Rb2HfCl6 crystals were synthesized via a co-precipitation method. Under UV excitation, Rb2HfCl6:Sb exhibits broad dual emission bands, attributed singlet triplet self-trapped exciton radiative transitions induced by Jahn–Teller distortion [SbCl6]3− octahedra. This endows material with high sensitivity excitation wavelengths, enabling tunable luminescence cyan orange-red across 400–800 nm. Utilizing this emission, white LED was fabricated, showcasing rendering index excellent long-term stability. Remarkably, breakthrough stability, maintaining more than 90% of its intensity at 100 °C, while also exhibiting remarkable resistance humidity oxygen exposure. Compared co-doped phosphors, offers advantages such as environmental friendliness, simple fabrication, stable performance, making it an ideal candidate WLEDs. study demonstrates notable progress developing thermally reliable
Language: Английский