持续发光
荧光粉
发光
尖晶石
红外线的
材料科学
光电子学
辐射
穿透深度
光子
紫外线
激发
光学
热释光
物理
冶金
量子力学
作者
Zaifa Pan,Victor Castaing,Liping Yan,Lulu Zhang,Cong Zhang,Kang Shao,Yifan Zheng,Chang‐Kui Duan,Jianhua Liu,Cyrille Richard,Bruno Viana
标识
DOI:10.1021/acs.jpcc.0c01951
摘要
Cr3+-activated persistent luminescent phosphors with a spinel structure are emerging materials in bio-imaging applications for their distinctive features of deep biotissue penetration and rechargeable near-infrared persistent emission. To realize the long-term and multicycle imaging purpose, reactivation using in situ external light with deep biotissue penetration is an alternative strategy, apart from the efforts on trap modulations for the host lattice. However, recharging with high-energy ultraviolet /visible photons will result in low activation efficiency because of the absorption by biological tissues. Here, we report a low-energy photon-rechargeable near-infrared persistent material, with rechargeable efficiency 400 times higher than that of the ZnGa2O4:Cr3+ reference material. The crystal field strength and band gap energies can be tailored by control of cation occupancy, contributing the red shift of both the persistent luminescence excitation and emission spectra of the optimized complex spinel samples. The persistent emission red shift is of interest for improved deep tissue penetration for bioimaging, whereas the persistent excitation red shift facilitates the activation of persistent luminescence by low-energy radiation. Furthermore, it demonstrates that increasing the rate of cation site inversion in the spinel can lead to higher storage capacity of charge trapping.
科研通智能强力驱动
Strongly Powered by AbleSci AI