The color of micro‐structured glass can be tuned by adjusting the cross‐relaxation between Er3+ ions through the mechanism of up‐conversion, although the range of color change is very limited. Here, we report the simple and reproducible synthesis of transparent oxy‐fluoride glass‐ceramics co‐doped with Yb3+/Er3+ by melting and secondary heat treatment. By adjusting the doping content of Er3+ ions from 0.2 to 10 mol%, followed by the secondary heat treatment, the intensity of up‐conversion luminescence under 980 nm laser excitation was increased by more than 100 times, and the glass‐ceramics showed an Er3+ doping content‐depended color change of the up‐conversion luminescence from green light to red light. The elemental analysis with TEM–EDS mapping and the measurement of the lifetime of up‐conversion luminescence suggest that changes in the cross‐relaxation between Er3+ ions is the principal mechanism behind the color change of up‐conversion luminescence. As a result, the red emission due to the electronic transition of 4F9/2 is much greater than that of the green emission (4S3/2). Therefore, we present a simple and reproducible strategy to achieve an efficient up‐conversion luminescence from glass‐ceramics with a broad range of color tunability and high color purity.

中文翻译：

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Er3+浓度对含氟玻璃陶瓷NaYF4上转换发光的影响

微结构玻璃的颜色可以通过调整Er之间的交叉弛豫来调节3+尽管颜色变化的范围非常有限，但离子通过上转换机制。在这里，我们报道了共掺杂 Yb 的透明氟氧化物玻璃陶瓷的简单且可重复的合成3+/呃3+通过熔化和二次热处理。通过调整Er的掺杂含量3+将离子从0.2 mol%添加到10 mol%，然后进行二次热处理，980 nm激光激发下的上转换发光强度提高100倍以上，微晶玻璃表现出Er3+上转换发光从绿光到红光的掺杂含量依赖性颜色变化。 TEM-EDS 图的元素分析和上转换发光寿命的测量表明，Er 之间的交叉弛豫发生了变化。3+离子是上转换发光颜色变化背后的主要机制。结果，由于电子跃迁而发出红光4F9/2远大于绿色排放（4S3/2）。因此，我们提出了一种简单且可重复的策略，以实现玻璃陶瓷的高效上转换发光，并具有广泛的颜色可调性和高颜色纯度。