College of Engineering, University of Georgia, Athens, GA 30602, USA.
Centre for Integrative Petroleum Research, College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum & Minerals, Dhahran 31261, Kingdom of Saudi Arabia.
Dalton Trans. 2021 Mar 16;50(10):3499-3505. doi: 10.1039/d1dt00120e.
This work reports the realization of Gd3+ persistent luminescence in the narrowband ultraviolet-B (NB-UVB; 310-313 nm) through persistent energy transfer from a sensitizer of Pr3+, Pb2+ or Bi3+. We propose a general design concept to develop Gd3+-activated NB-UVB persistent phosphors from Pr3+-, Pb2+- or Bi3+-activated ultraviolet-C (200-280 nm) or ultraviolet-B (280-315 nm) persistent phosphors, leading to the discovery of ten Gd3+ NB-UVB persistent phosphors such as Sr3Gd2Si6O18:Pr3+, Sr3Gd2Si6O18:Pb2+ and Y2GdAl2Ga3O12:Bi3+ as well as five ultraviolet-B persistent phosphors such as Y3Al2Ga3O12:Pr3+, Sr3Y2Si6O18:Pb2+ and Y3Al2Ga3O12:Bi3+. The persistent energy transfer from the sensitizers to Gd3+ is very efficient and the Gd3+ NB-UVB afterglow can last for more than 10 hours. This study expands the persistent luminescence research to the NB-UVB as well as the broader ultraviolet-B spectral regions. The NB-UVB persistent phosphors may act as self-sustained glowing NB-UVB radiation sources for dermatological therapy.
这项工作通过从敏化剂 Pr3+、Pb2+或 Bi3+ 中进行持续能量转移，实现了 Gd3+在窄带紫外线-B（NB-UVB；310-313nm）中的长余辉。我们提出了一个通用的设计概念，从 Pr3+、Pb2+-或 Bi3+-激活的紫外线-C（200-280nm）或紫外线-B（280-315nm）长余辉磷光体中开发 Gd3+激活的 NB-UVB 长余辉荧光粉，从而发现了十个 Gd3+ NB-UVB 长余辉荧光粉，如 Sr3Gd2Si6O18:Pr3+、Sr3Gd2Si6O18:Pb2+和 Y2GdAl2Ga3O12:Bi3+，以及五个紫外线-B 长余辉荧光粉，如 Y3Al2Ga3O12:Pr3+、Sr3Y2Si6O18:Pb2+和 Y3Al2Ga3O12:Bi3+。敏化剂到 Gd3+的持续能量转移非常有效，Gd3+的 NB-UVB 余晖可以持续 10 小时以上。这项研究将长余辉研究扩展到了 NB-UVB 以及更广泛的紫外线-B 光谱区域。NB-UVB 长余辉荧光粉可用作皮肤病学治疗的自持续发光 NB-UVB 辐射源。
