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  1. Article ; Online: Two-Dimensional Hybrid Perovskite with High-Sensitivity Optical Thermometry Sensors.

    Guan, Mengyu / Hao, Jiarui / Qiu, Lei / Molokeev, Maxim S / Ning, Lixin / Dai, Zhigao / Li, Guogang

    Inorganic chemistry

    2024  Volume 63, Issue 8, Page(s) 3835–3842

    Abstract: Optical thermometry has gained significant attention due to its remarkable sensitivity and noninvasive, rapid response to temperature changes. However, achieving both high absolute and relative temperature sensitivity in two-dimensional perovskites ... ...

    Abstract Optical thermometry has gained significant attention due to its remarkable sensitivity and noninvasive, rapid response to temperature changes. However, achieving both high absolute and relative temperature sensitivity in two-dimensional perovskites presents a substantial challenge. Here, we propose a novel approach to address this issue by designing and synthesizing a new narrow-band blue light-emitting two-dimensional perovskite named (C
    Language English
    Publishing date 2024-02-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.3c04140
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Tailoring of White Luminescence in a NaLi

    Zhao, Ming / Yang, Zhiyu / Ning, Lixin / Xia, Zhiguo

    Advanced materials (Deerfield Beach, Fla.)

    2021  Volume 33, Issue 29, Page(s) e2101428

    Abstract: Single-component materials with white-light emission are ideal for lighting applications. However, it is very challenging to achieve white luminescence in single-dopant activated solid phosphors. Herein, white ... ...

    Abstract Single-component materials with white-light emission are ideal for lighting applications. However, it is very challenging to achieve white luminescence in single-dopant activated solid phosphors. Herein, white NaLi
    Language English
    Publishing date 2021-06-06
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1474949-X
    ISSN 1521-4095 ; 0935-9648
    ISSN (online) 1521-4095
    ISSN 0935-9648
    DOI 10.1002/adma.202101428
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Multifractal Characteristics of Seismogenic Systems and b Values in the Taiwan Seismic Region

    Hui, Chun / Cheng, Changxiu / Ning, Lixin / Yang, Jing

    ISPRS international journal of geo-information. 2020 June 10, v. 9, no. 6

    2020  

    Abstract: Seismically active fault zones are complex natural systems and they exhibit multifractal correlation between earthquakes in space and time. In this paper, the seismicity of the Taiwan seismic region was studied through the multifractal characteristics of ...

    Abstract Seismically active fault zones are complex natural systems and they exhibit multifractal correlation between earthquakes in space and time. In this paper, the seismicity of the Taiwan seismic region was studied through the multifractal characteristics of the spatial-temporal distribution of earthquakes from 1st January 1995 to 1st January 2019. We quantified the multifractal characteristics of Taiwan at different scales and defined them as ΔD values. Furthermore, we studied the relationship between the ΔD and b values, which signifies the average size distribution of those earthquakes. The results are as follows. (1) The temporal multifractal curve changes substantially before and after the strong earthquakes. (2) The maximum ΔD value of the seismic region in Taiwan occurs at depths of 0~9 km, indicating that geological structures and focal mechanisms is the most complex at these depths compared with other depths. (3) ΔD values for different regions range from 0.2~1.5, and b values range from 0.65~1.3, with a significant positive correlation between them (ΔD = 1.5 × b - 0.68). For this purpose, a statistical relationship is developed between b and ΔD values, and regional and temporal changes of these parameters are analyzed in order to reveal the potential of future earthquakes in the study region.
    Keywords geophysics ; spatial data ; Taiwan
    Language English
    Dates of publication 2020-0610
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2655790-3
    ISSN 2220-9964
    ISSN 2220-9964
    DOI 10.3390/ijgi9060384
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Intrinsic Point Defects and Dopants Ce³⁺ in SrLiAl₃N₄: Thermodynamic and Spectral Properties from First Principles

    Huang, Xiaoxiao / Qiao, Zheng / Wen, Jun / Ning, Lixin

    Journal of physical chemistry. 2020 May 27, v. 124, no. 24

    2020  

    Abstract: Lanthanide-doped SrLiAl₃N₄ are among the most promising phosphor materials for solid-state lighting due to their superior luminescence properties. Native point defects occur naturally during their synthesis at high temperature and may act as charge- ... ...

    Abstract Lanthanide-doped SrLiAl₃N₄ are among the most promising phosphor materials for solid-state lighting due to their superior luminescence properties. Native point defects occur naturally during their synthesis at high temperature and may act as charge-compensating centers for aliovalent lanthanide substitutions or as trapping centers of electrons from the conduction band, but their nature and influence on luminescence properties are not well understood. Herein, we perform a systematic study on intrinsic point defects and dopants Ce³⁺ in SrLiAl₃N₄ by combining hybrid density-functional theory (DFT) and multi-configurational ab initio calculations. DFT-based defect formation energies predict that Li substitution at the Sr site (LiSᵣ) is the most favorable acceptor-type point defect, and nitrogen vacancies provide electron-trapping levels with suitable depths for realizing persistent luminescence at room temperature. Calculated Boltzmann-weighted occurrence probabilities and 4f → 5d transition energies of Ce³⁺ reveal that the emission in SrLiAl₃N₄:Ce originates mainly from Ce³⁺ located at the Sr2 site, whereas the emission tail on the long-wavelength side arises from Ce³⁺ at the Sr1 site, both charge-compensated by intrinsic LiSᵣ defects. On this basis, geometric parameters in the local coordination structures are identified to interpret the relative spectral shift of Ce³⁺ at the Sr1 and Sr2 sites. The present results can also serve as a theoretical basis for the engineering of nitridolithoaluminate-based phosphors with targeted luminescence properties.
    Keywords ambient temperature ; density functional theory ; geometry ; luminescence ; nitrogen ; physical chemistry ; tail ; thermodynamics
    Language English
    Dates of publication 2020-0527
    Size p. 13400-13408.
    Publishing place American Chemical Society
    Document type Article
    Note NAL-AP-2-clean
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.0c04052
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Exploring Intrinsic Electron-Trapping Centers for Persistent Luminescence in Bi

    Qiao, Zheng / Wang, Xuesong / Heng, Chen / Jin, Wei / Ning, Lixin

    Inorganic chemistry

    2021  Volume 60, Issue 21, Page(s) 16604–16613

    Abstract: Revealing the nature of intrinsic defects that act as charge-carrier trapping centers for persistent luminescence (PersL) in inorganic phosphors remains a crucial challenge from an experimental perspective. It was recently reported that ... ...

    Abstract Revealing the nature of intrinsic defects that act as charge-carrier trapping centers for persistent luminescence (PersL) in inorganic phosphors remains a crucial challenge from an experimental perspective. It was recently reported that Bi
    Language English
    Publishing date 2021-10-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.1c02507
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Interplay of defect levels and rare earth emission centers in multimode luminescent phosphors.

    Zhou, Xinquan / Ning, Lixin / Qiao, Jianwei / Zhao, Yifei / Xiong, Puxian / Xia, Zhiguo

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 7589

    Abstract: Multimode luminescence generally involves tunable photon emissions in response to various excitation or stimuli channels, which demonstrates high coding capacity and confidentiality abilities for anti-counterfeiting and encryption technologies. ... ...

    Abstract Multimode luminescence generally involves tunable photon emissions in response to various excitation or stimuli channels, which demonstrates high coding capacity and confidentiality abilities for anti-counterfeiting and encryption technologies. Integrating multimode luminescence into a single stable material is a promising strategy but remains a challenge. Here, we realize distinct long persistent luminescence, short-lived down/upconversion emissions in NaGdTi
    Language English
    Publishing date 2022-12-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-35366-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Role of the Rigid Host Structure in Narrow-Band Green Emission of Eu

    Wang, Xuesong / Huang, Xiaoxiao / Zhao, Ming / Tanner, Peter A / Zhou, Xianju / Ning, Lixin

    Inorganic chemistry

    2022  Volume 61, Issue 19, Page(s) 7617–7623

    Abstract: ... ...

    Abstract Eu
    Language English
    Publishing date 2022-05-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.2c00868
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Narrowband Ultraviolet-B Persistent Luminescence in an Indoor-Lighting Environment through Energy Transfer from Host Excitons to Gd

    Shan, Xihui / Ying, Xiao / Liang, Yanjie / Zhang, Yi / Lv, Xulong / Chen, Dongxun / Miao, Shihai / Ning, Lixin

    Inorganic chemistry

    2023  Volume 62, Issue 30, Page(s) 12050–12057

    Abstract: Narrowband ultraviolet-B (NB-UVB) luminescent materials are characterized by high photon energy, narrow spectral width, and visible-blind emission, thus holding great promise for photochemistry and photomedicine. However, most NB-UVB phosphors developed ... ...

    Abstract Narrowband ultraviolet-B (NB-UVB) luminescent materials are characterized by high photon energy, narrow spectral width, and visible-blind emission, thus holding great promise for photochemistry and photomedicine. However, most NB-UVB phosphors developed so far are photoluminescent, where continuous external excitation is needed. Herein, we realize NB-UVB persistent luminescence (PersL) in an indoor-lighting environment by exploiting the interaction between self-trapped/defect-trapped excitons and Gd
    Language English
    Publishing date 2023-07-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.3c01558
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: A Hybrid Deep Learning-Based Spatiotemporal Fusion Method for Combining Satellite Images with Different Resolutions

    Jia, Duo / Cheng, Changxiu / Song, Changqing / Shen, Shi / Ning, Lixin / Zhang, Tianyuan

    Remote Sensing. 2021 Feb. 10, v. 13, no. 4

    2021  

    Abstract: Spatiotemporal fusion (STF) is considered a feasible and cost-effective way to deal with the trade-off between the spatial and temporal resolution of satellite sensors, and to generate satellite images with high spatial and high temporal resolutions. ... ...

    Abstract Spatiotemporal fusion (STF) is considered a feasible and cost-effective way to deal with the trade-off between the spatial and temporal resolution of satellite sensors, and to generate satellite images with high spatial and high temporal resolutions. This is achieved by fusing two types of satellite images, i.e., images with fine temporal but rough spatial resolution, and images with fine spatial but rough temporal resolution. Numerous STF methods have been proposed, however, it is still a challenge to predict both abrupt landcover change, and phenological change, accurately. Meanwhile, robustness to radiation differences between multi-source satellite images is crucial for the effective application of STF methods. Aiming to solve the abovementioned problems, in this paper we propose a hybrid deep learning-based STF method (HDLSFM). The method formulates a hybrid framework for robust fusion with phenological and landcover change information with minimal input requirements, and in which a nonlinear deep learning-based relative radiometric normalization, a deep learning-based superresolution, and a linear-based fusion are combined to address radiation differences between different types of satellite images, landcover, and phenological change prediction. Four comparative experiments using three popular STF methods, i.e., spatial and temporal adaptive reflectance fusion model (STARFM), flexible spatiotemporal data fusion (FSDAF), and Fit-FC, as benchmarks demonstrated the effectiveness of the HDLSFM in predicting phenological and landcover change. Meanwhile, HDLSFM is robust for radiation differences between different types of satellite images and the time interval between the prediction and base dates, which ensures its effectiveness in the generation of fused time-series data.
    Keywords cost effectiveness ; hybrids ; land cover ; models ; phenology ; prediction ; radiometry ; reflectance ; satellites ; time series analysis
    Language English
    Dates of publication 2021-0210
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2513863-7
    ISSN 2072-4292
    ISSN 2072-4292
    DOI 10.3390/rs13040645
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Internal OH

    Feng, Yansong / Li, Zhi / Li, Qiqing / Yuan, Jun / Tu, Langping / Ning, Lixin / Zhang, Hong

    Light, science & applications

    2021  Volume 10, Issue 1, Page(s) 105

    Abstract: Internal hydroxyl impurity is known as one of the main detrimental factors affecting the upconversion (UC) efficiency of upconversion luminescence (UCL) nanomaterials. Different from surface/ligand-related emission quenching which can be effectively ... ...

    Abstract Internal hydroxyl impurity is known as one of the main detrimental factors affecting the upconversion (UC) efficiency of upconversion luminescence (UCL) nanomaterials. Different from surface/ligand-related emission quenching which can be effectively diminished by, e.g., core/shell structure, internal hydroxyl is easy to be introduced in synthesis but difficult to be quantified and controlled. Therefore, it becomes an obstacle to fully understand the relevant UC mechanism and improve UC efficiency of nanomaterials. Here we report a progress in quantifying and large-range adjustment of the internal hydroxyl impurity in NaYF
    Language English
    Publishing date 2021-05-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2662628-7
    ISSN 2047-7538 ; 2047-7538
    ISSN (online) 2047-7538
    ISSN 2047-7538
    DOI 10.1038/s41377-021-00550-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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