CEA, DMN, SRMA, Gif-sur Yvette, France.
J Phys Condens Matter. 2011 Mar 23;23(11):115901. doi: 10.1088/0953-8984/23/11/115901. Epub 2011 Feb 28.
Yttria-stabilized zirconia (ZrO(2):Y(3+)) single crystals (with 9.5 mol% Y(2)O(3)) were irradiated with ions (from 1 MeV He to 2.6 GeV U). Electron paramagnetic resonance (EPR) data show that two kinds of colour centres (F(+)-type and T centres) are produced. Thermo-stimulated luminescence (TSL) data exhibit a quite strong peak at ∼ 500-550 K in the glow curves of all irradiated samples regardless of the ion species and energy. Moreover, the 3D-TSL measurements reveal that this peak is correlated with a light emission at a wavelength of ∼ 620 nm (i.e. photon energy ∼ 2 eV). The TSL peak maximum temperatures are consistent with characteristic temperatures of about 500 K of annealing stages of colour centres. However, the trap-depth energies (ranging between 0.7 and 1.4 eV) deduced from the initial rise of partially cleaned TSL peaks, or from a rough approximation using Urbach's formula, are rather larger than the activation energies for defect recovery, ranging between 0.3 and 0.7 eV, as deduced from the EPR data. The processes involved in TSL are discussed in relation to available photoluminescence and defect energy-level data.
钇稳定氧化锆（ZrO(2):Y(3+))单晶（含 9.5 摩尔%的 Y(2)O(3)) 经离子辐照（从 1 MeV 的 He 到 2.6 GeV 的 U）。电子顺磁共振（EPR）数据表明，产生了两种色心（F(+)-型和 T 中心）。热激励发光（TSL）数据在所有辐照样品的发光曲线中都在 ∼500-550 K 处显示出一个相当强的峰，无论离子种类和能量如何。此外，3D-TSL 测量表明，该峰与波长约为 620nm 的光发射（即光子能量约为 2eV）相关。TSL 峰的最大温度与色心退火阶段约 500K 的特征温度一致。然而，从部分清洁 TSL 峰的初始上升或使用 Urbach 公式的粗略近似推断出的陷阱深度能量（在 0.7 和 1.4eV 之间）比从 EPR 数据推断出的缺陷恢复的激活能（在 0.3 和 0.7eV 之间）要大得多。与可用的光致发光和缺陷能级数据有关，讨论了 TSL 涉及的过程。
