Realization of color hue tuning via efficient Tb3+–Mn2+ energy transfer in Sr3Tb(PO4)3:Mn2+, a potential near-UV excited phosphor for white LEDs
文献信息
Wei Lü, Hongpeng You
A n-UV convertible phosphor Sr3Tb(PO4)3:Mn2+ with tunable-emitting color has been synthesized by solid state reaction. The GSAS refinement shows that the obtained powder crystallizes as a cubic unit cell with space group I3d, and Mn2+ ions occupy the Sr2+ crystallographic sites. Under 7F6 → 5D3 of Tb3+ excitation at 381 nm, Sr3Tb(PO4)3:Mn2+ not only exhibits 5D4 → 7F6–3 of Tb3+ green emission lines but also 4T1 → 6A1 of the Mn2+ orange emission band. In addition, the intensity ratio of the orange/green emission bands can be enhanced through the increase of Mn2+ content. The intense orange emission band of the Mn2+ ions is attributed to the efficient energy transfer from the Tb3+ to Mn2+ ions, which has been justified through the luminescence spectra and fluorescence decay dynamics. The energy transfer mechanism was demonstrated to be the electric dipole–dipole interaction based on the Inokuti–Hirayama theoretical model, and the energy transfer efficiency was calculated. Optimal-composition samples show high external quantum efficiency, up to 59.3%, indicating the potential of the powder as a n-UV convertible phosphor for white LEDs.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.














