Harvesting Light from BaHfO₃/Eu³⁺ through Ultraviolet, X-ray, and Heat Stimulation: An Optically Multifunctional Perovskite.

ABSTRACT: Materials with optical multifunctionality such as photoluminescence (PL), radioluminescence, and thermoluminescence (TL) are a boon for a sustainable society. BaHfO₃ (barium hafnium oxide [BHO]) under UV irradiation demonstrated visible PL endowed by oxygen vacancies (OVs). Eu³⁺ doping in BHO (BHOE) introduces f-state impurity levels just below the conduction band for both Eu@Ba and Eu@Hf sites, causing efficient host-to-dopant energy transfer, generating intense ⁵D₀ → ⁷F₁ magnetic dipole transitions (MDT) with internal quantum yield of ∼70%. X-ray photoelectron spectroscopy and electron paramagnetic resonance showed the formation of OVs in both BHO and BHOE samples with more vacancies in the doped sample. The positron lifet

SUBMITTER: Gupta SK 

PROVIDER: S-EPMC8851442 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature