Sensitive mechanoluminescence from Eu2+, Tm3+ co-doped Sr3Al2O5Cl2 phosphors
Sensitive mechanoluminescence from Eu2+, Tm3+ co-doped Sr3Al2O5Cl2 phosphors
复制标题
DOI：
10.1016/j.jlumin.2022.118983
复制
发表时间：
2022-05
影响因子：
3.6
通讯作者：
Wei Meng;Pengbo Cai;Xiao-yan Fu;Hongwu Zhang
中科院分区：
文献类型：
--
作者：
Wei Meng;Pengbo Cai;Xiao-yan Fu;Hongwu Zhang
本文研制了灵敏的机械发光（ML）荧光粉Sr3Al2O5Cl2:Eu2+， Tm3+。研究了共掺杂Tm3+离子对样品ML性能的影响。结果表明：光致发光、后辉发光和光致发光相似，均在610 nm处形成一个宽频带，这可归因于Eu2+的4f65 d1→4f7跃迁。这一结果表明，ML也来源于Eu2+发射中心，而不是Tm3+离子。热释光和ML结果证实了Tm3+离子形成的浅阱（0.656 eV）是敏感ML的来源，并且随着共掺杂Tm3+离子的增加，浅阱密度大大增加，从而产生了较强的敏感ML强度。当Tm3+含量达到0.05时，样品在10-50 n的压缩载荷下的ML敏感强度达到最强。此外，所获得的结果还表明，在10-800 n的强压缩载荷下，深阱可以提供产生长时间稳定的ML发射的可能性。这些结果表明，Sr3Al2O5Cl2:Eu2+， Tm3+荧光粉在微弱应力的珍贵检测和长时间稳定的ML检测中具有很大的潜力。
In this paper, sensitive mechanoluminescence (ML) phosphors Sr3Al2O5Cl2:Eu2+, Tm3+have been developed. The effect of co-doped Tm3+ions on the ML properties of the samples were investigated. The results showed that the ML emission, afterglow emission and photoluminescence were similar all consisted of a broad band peated at 610 nm, which can be ascribed to the 4f65 d1→4f7transition of Eu2+. This result indicated that the ML also originated from the Eu2+emitting center not the Tm3+ions. The thermoluminescence and ML results have confirmed that the shallow traps (0.656 eV) created by the Tm3+ions answered for the origin of sensitive ML. Furthermore, following the increase of co-doped Tm3+ions, the density of shallow trap increased greatly, which brought out strong sensitive ML intensity accordingly. When the content of Tm3+reached 0.05, sensitive ML intensity of the sample arrived at the strongest under the compressive load of 10–50 N. In addition, the obtained results also showed that the deep traps can provide the possibility to produce long time stable ML emission under strong compressive load of 10–800 N. Even after 120 min, stable obvious ML signals can be observed. All these results suggested that Sr3Al2O5Cl2:Eu2+, Tm3+phosphors possessed great potential in precious detection of weak stress and long time stable ML detection.