| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Solid-state Optical Materials and Luminescence Properties
|
| Presentation Title |
UVC and UVB Dual-band Persistent Luminescent Phosphor |
| Author(s) |
Yuanbing Mao, Xianli Wang |
| On-Site Speaker (Planned) |
Yuanbing Mao |
| Abstract Scope |
While persistent luminescence (PersL) at visible and infrared are frequently reported in lanthanide-doped phosphors, ultraviolet PersL remains much less. Here, we have designed Pr3+-doped (Ca1.5Y1.5)(Al3.5Si1.5)O12 (CYAS-Pr) through co-substituting Ca2+-Si4+ into a well-known garnet structure, Y3Al5O12. By the strategy of Ca2+-Si4+ co-substitution, the CYAS-Pr exhibits lattice distortion and subsequently an unprecedent UVC and UVB dual-band PersL with maxima at 266 and 311 nm for 12 hours after charged by UV irradiation due to creation of intrinsic trapping centers. The unique PersL performance is contributed by an existence of two different Pr3+ environments at Ca2+ and Y3+ sites of the CYAS host. The CYAS-Pr shows efficient dual information storage and precise long-distance self-sustained “solar-blind” imaging capabilities in a wide and bright field of view. It is expected that the UVC and UVB dual-band PersL CYAS-Pr will find more applications and trigger further exploration towards persistent sterilization and persistent photocatalysis. |