Persistent luminescence (PersL) materials that can be excited by natural sunlight are in great demand to reduce energy consumption, but the design and development of efficient sunlight-activated PersL phosphor remains a daunting challenge so far. Herein, we report the development of a new kind of sunlight-activated PersL material based on Bi³⁺-doped Sr₃Y₂Ge₃O₁₂ (SYGO) phosphor, which exhibits an intense UV-Visible-NIR PersL and possesses a super-long PersL longer than 60 h. This newly developed PersL material can be effectively and repeatedly activated by sunlight radiation in all kinds of weather conditions because of its high response to both direct sunlight and diffuse solar radiation. Owing to the existence of stabilized deep traps with suitable depths, SYGO:Bi³⁺ also shows excellent photostimulated luminescence (PSL) properties. A series of excitation-time-dependent TL experiments, PL and PersL spectra were systematically studied to reveal the trapping and de-trapping processes of this material. Furthermore, by utilizing the unique PersL and PSL properties, we demonstrate the applications of SYGO:Bi³⁺ for night-vision signage and optical information storage. Our achievement in the case of Bi³⁺-doped SYGO phosphor is expected to promote the future development of more excellent sunlight-activated and photostimulated PersL materials towards versatile practical applications.

为了减少能耗，人们迫切需要能被自然阳光激发的持久发光（PersL）材料，但是迄今为止，高效阳光激活的PersL荧光粉的设计和开发仍然是一项艰巨的挑战。在此，我们报告了一种新型的基于Bi ³⁺掺杂的Sr ₃ Y ₂ Ge ₃ O ₁₂的阳光活化PersL材料的开发。（SYGO）磷光体，具有很强的UV-Visible-NIR PersL，并具有超过60小时的超长PersL。这种新开发的PersL材料可以在各种天气条件下被阳光辐射有效且重复地激活，因为它对直射阳光和散射太阳辐射都具有很高的响应能力。由于存在稳定且深度合适的深陷阱，因此SYGO：Bi ³⁺也显示出出色的光刺激发光（PSL）特性。系统地研究了一系列与激发时间有关的TL实验，PL和PersL光谱，以揭示这种材料的俘获和去俘获过程。此外，通过利用独特的PersL和PSL属性，我们演示了SYGO：Bi ³⁺的应用用于夜视标牌和光学信息存储。预期我们在掺Bi ^3+的SYGO荧光粉方面的成就将促进更优异的日光活化和光刺激的PersL材料的未来发展，以实现广泛的实际应用。