Y2O3Eu3

Y2O3:Eu3+ (europium-doped yttrium oxide) is a red-emitting inorganic phosphor formed by introducing trivalent europium ions into the yttrium oxide host lattice. Y2O3 adopts a bixbyite-type cubic structure, and Eu3+ ions substitute for Y3+ to create activator centers that produce luminescence. The prominent red emission results from the Eu3+ 5D0 → 7F2 transition, with sharp lines around 612–617 nm; the 5D0 → 7F1 transition also appears at shorter wavelengths. The luminescence is efficiently excited by blue to near-UV light (roughly 395–465 nm), making it compatible with GaN-based LEDs.

Preparation methods include solid-state synthesis from Y2O3 and Eu2O3 at high temperatures (typically 1000–1600 °C) and various wet-chemical routes such as sol-gel, co-precipitation, or combustion synthesis. Dopant concentrations commonly range from 1 to 5 mol% Eu3+; higher levels can lead to concentration quenching and reduced quantum efficiency.

Applications of Y2O3:Eu3+ primarily center on red phosphor use in display technologies and phosphor-converted white LEDs, where persistent red emission complements other phosphors. The host lattice provides high thermal and chemical stability and a wide band gap, contributing to durable performance in lighting and display applications.

Notes on performance can depend on synthesis conditions, particle size, and site occupancy, which can influence emission intensity and color purity. See also europium, yttrium oxide, and phosphor materials.