In very recent years, ultraviolet (UV) persistent luminescent materials (PLMs) have attracted widespread attention due to their potential biological applications. However, owing to the lack of suitable emitters and hosts, the design and development of excellent UV PLMs remain challenging. Here, we report a new Gd-based PLM NaGdGeO₄:Bi³⁺ with super-long UVA persistent luminescence (PersL). By further co-doping Li⁺ ions to increase the concentration of traps, the UVA PersL intensity of NaGdGeO₄:Bi³⁺ is increased by 5.5 times. The optimal NaGdGeO₄:Bi³⁺,Li⁺ exhibits excellent UVA PersL and can persist for more than 200 h. Moreover, the phosphor NaGdGeO₄:Bi³⁺,Li⁺ also exhibits photostimulated property with a red LED or NIR laser excitation after the long-term decay, and can be activated by X-ray. This promising Gd-based UVA PLM is expected to have potential applications in biomedicine through triggering photocatalysts or photosensitizers by its UVA PersL to achieve photodynamic therapy and its potential ability of magnetic resonance (MR) imaging due to Gd³⁺ ions as MR imaging probe contained in the host NaGdGeO₄.

近年来，紫外（UV）持久发光材料（PLM）因其潜在的生物学应用而受到广泛关注。然而，由于缺乏合适的发射器和主体，优秀 UV PLM 的设计和开发仍然具有挑战性。在这里，我们报告了一种新的基于 Gd 的 PLM NaGdGeO ₄ :Bi ³⁺，具有超长 UVA 持续发光 (PersL)。通过进一步共掺杂Li ⁺离子以增加陷阱浓度，NaGdGeO ₄ :Bi ³⁺的UVA PersL强度提高了5.5倍。最佳NaGdGeO ₄ :Bi ³⁺ ,Li ⁺表现出优异的 UVA PersL 并且可以持续超过 200 小时。此外，荧光粉NaGdGeO ₄ :Bi ³⁺ ,Li ⁺在长时间衰减后也表现出红色LED或NIR激光激发的光刺激特性，并且可以被X射线激活。^{这种有前景的基于 Gd 的 UVA PLM 有望通过其 UVA PersL 触发光催化剂或光敏剂来实现光动力治疗以及由于 Gd 3+}离子作为 MR 成像探针而具有潜在的磁共振 (MR) 成像能力，从而在生物医学中具有潜在应用在主体 NaGdGeO ₄中。