Ultraviolet luminescence holds potential for diverse applications. Further development of the ultraviolet luminescence technology, however, is hindered by the common but very inconvenient photoluminescence form. Here we create a new form of ultraviolet emission persistent luminescence in the narrowband ultraviolet-B (NB-UVB, 309$-$313~nm) upon illumination by a blue light-emitting diode. On this basis, we study the dynamic competition between an up-conversion charging excitation and a photostimulated detrapping upon illumination by the light-emitting diode. Such a competition mechanism, as well as the associated manipulation technique, appears to be generally applicable for many existing phosphors. As a proof of concept, we present an imaging demonstration showing potential of the NB-UVB persistent luminescence in optical tagging field. This work can potentially revolutionize the ways for utilizing persistent luminescence, leading NB-UVB applications to a new level.

中文翻译：

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蓝光照射下窄带紫外线B的持久发射

紫外线发光在各种应用中具有潜力。然而，普通但非常不便的光致发光形式阻碍了紫外光致发光技术的进一步发展。在这里，我们通过蓝光发射二极管的照射，在窄带紫外线B（NB-UVB，309 $-$ 313〜nm）中创建了一种新形式的紫外线发射持续发光。在此基础上，我们研究了上转换充电激励与发光二极管照明后的光激发去陷之间的动态竞争。这种竞争机制以及相关的操纵技术似乎普遍适用于许多现有的磷光体。作为概念的证明，我们提出了成像演示，展示了NB-UVB持久发光在光学标签领域中的潜力。