Abstract Yb3+/Ln3+(Ln = Er/Tm/Ho)-α-sialon ceramics were fabricated by hot press sintering technique. Their microstructure and luminescent properties were studied by XRD, EDS, HRTEM and photoluminescence measurements. The results showed that the sintered ceramics consisted of α-Sialon with a trace amount of β-Sialon phase. The frequency upconversion and downconversion properties of Yb3+/Ln3+(Ln = Er/Tm/Ho)-α-Sialon ceramics were investigated under 980 nm low-power excitation. The different concentrations of Yb3+/Ln3+(Ln = Er/Tm/Ho) produced multicolor emissions characteristics of each Ln3+ ion as a result of the energy transfer from Yb3+ to Er3+, Tm3+ and Ho3+ ions. The EDS spectra measurements and mappings showed that the Ln3+ ions were well incorporated in the α-Sialon matrix. Temporal evolution of the emission decay behavior has been investigated to understand the energy transfer mechanism.

中文翻译：

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Yb3+/Ln3+(Ln=Er/Tm/Ho)离子掺杂α-Sialon的微观结构研究和多色上转换

摘要 采用热压烧结技术制备了Yb3+/Ln3+(Ln = Er/Tm/Ho)-α-sialon陶瓷。通过XRD、EDS、HRTEM和光致发光测量研究了它们的微观结构和发光性能。结果表明，烧结陶瓷由α-Sialon 和微量的β-Sialon 相组成。在980 nm低功率激发下研究了Yb3+/Ln3+(Ln = Er/Tm/Ho)-α-Sialon陶瓷的上变频和下变频特性。由于能量从 Yb3+ 转移到 Er3+、Tm3+ 和 Ho3+ 离子，不同浓度的 Yb3+/Ln3+(Ln = Er/Tm/Ho) 产生了每个 Ln3+ 离子的多色发射特征。EDS 光谱测量和映射表明 Ln3+ 离子很好地结合在 α-Sialon 基质中。