Youjie Hua

China Jiliang University

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Shiqing Xu

China Jiliang University

Lei Lei

Xi'an University of Architecture and Technology

Yubin Wang

Tsinghua University

Degang Deng

China Jiliang University

Paras N. Prasad

University at Buffalo, State University of New York

Xiaojun Li

Beijing National Laboratory for Molecular Sciences

Junjie Zhang

China Jiliang University

Hongping Ma

Zhejiang University of Science and Technology

Weixin Xu

China Jiliang University

Renguang Ye

China Jiliang University

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China Jiliang University

Chinese Academy of Sciences

Hangzhou Xixi hospital

University of Chinese Academy of Sciences

Zhejiang University

Xi'an University of Architecture and Technology

State Council of the People's Republic of China

University at Buffalo, State University of New York

Shanghai Institute of Optics and Fine Mechanics

Beijing National Laboratory for Molecular Sciences

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Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging

Nature Communications (2024)

Lei Lei Minghao Yi Yubin Wang Youjie Hua Junjie Zhang

Lanthanide-doped fluoride nanoparticles (NPs) showcase adjustable X-ray-excited persistent luminescence (XEPL), holding significant promise for applications in three-dimensional (3D) imaging through the creation of flexible X-ray detectors. However, a dangerous high X-ray irradiation dose rate and complicated heating procedure are required to generate efficient XEPL for high-resolution 3D imaging, which is attributed to a lack of strategies to significantly enhance the XEPL intensity. Here we report that the XEPL intensity of a series of lanthanide activators (Dy, Pr, Er, Tm, Gd, Tb) is greatly improved by constructing dual heterogeneous interfaces in a double-shell nanostructure. Mechanistic studies indicate that the employed core@shell@shell structure could not only passivate the surface quenchers to lower the non-radiative relaxation possibility, but also reduce the interfacial Frenkel defect formation energy leading to increase the trap concentration. By employing a NPs containing flexible film as the scintillation screen, the inside 3D electrical structure of a watch was clearly achieved based on the delayed XEPL imaging and 3D reconstruction procedure. We foresee that these findings will promote the development of advanced X-ray activated persistent fluoride NPs and offer opportunities for safer and more efficient X-ray imaging techniques in a number of scientific and practical areas.

10.1038/s41467-024-45390-0

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Citations (28)

Modification of the crystal structure of Sr_2−xBa_xSi(O,N)₄: Eu²⁺ phosphors to improve their luminescence properties

CrystEngComm (2015)

Xiaojun Li Youjie Hua Hongping Ma Degang Deng Shiqing Xu

A series of Sr_1.98−xBa_xSi(O,N)₄: 0.02Eu²⁺ (0 ≤ x ≤ 0.5) phosphors were synthesized. We anticipate that these materials can be used as green or red phosphors in white light emitting diodes.

Crystal (programming language)

10.1039/c5ce01605c

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Manipulation of time-dependent multicolour evolution of X-ray excited afterglow in lanthanide-doped fluoride nanoparticles

Nature Communications (2022)

Lei Lei Yubin Wang Weixin Xu Renguang Ye Youjie Hua

External manipulation of emission colour is of significance for scientific research and applications, however, the general stimulus-responsive colour modulation method requires both stringent control of microstructures and continously adjustment of particular stimuli conditions. Here, we introduce pathways to manipulate the kinetics of time evolution of both intensity and spectral characteristics of X-ray excited afterglow (XEA) by regioselective doping of lanthanide activators in core-shell nanostructures. Our work reported here reveals the following phenomena: 1. The XEA intensities of multiple lanthanide activators are significantly enhanced via incorporating interstitial Na+ ions inside the nanocrystal structure. 2. The XEA intensities of activators exhibit diverse decay rates in the core and the shell and can largely be tuned separately, which enables us to realize a series of core@shell NPs featuring distinct time-dependent afterglow colour evolution. 3. A core/multi-shell NP structure can be designed to simultaneously generate afterglow, upconversion and downshifting to realize multimode time-dependent multicolour evolutions. These findings can promote the development of superior XEA and plentiful spectral manipulation, opening up a broad range of applications ranging from multiplexed biosensing, to high-capacity information encryption, to multidimensional displays and to multifunctional optoelectronic devices.

Photon Upconversion

10.1038/s41467-022-33489-1

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Citations (75)