The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform

Zhiguo Xia - One of the best experts on this subject based on the ideXlab platform.

  • Recent progress of zero-dimensional luminescent Metal Halides.
    Chemical Society reviews, 2021
    Co-Authors: Zhiguo Xia
    Abstract:

    Zero-dimensional (0D) all-inorganic/organic-inorganic Metal Halides, as emerging luminescent materials, have attracted unparalleled interest from versatile perspectives due to their unique crystallographic/electronic structures with isolated building units and fascinating optical characteristics. However, significant challenges still exist for 0D Metal Halides, including their chemical molecular design, photoluminescence (PL) mechanism, PL modification and applications. In this review, we summarize the 0D Metal Halides through the classification of all-inorganic and organic-inorganic hybrid Metal Halides, and further emphasize the unique role of B-site cations with different electronic configurations in the PL process. Furthermore, the PL mechanisms focusing on the self-trapped excitons (STEs) model and PL regulation engineering are examined to explore their extraordinary PL properties and further reveal new application prospects. This review aims to provide in-depth insight into the structure-luminescence-application relationship of 0D Metal Halides and pave the way for the realization of next-generation high-performance luminescent materials.

  • hybrid Metal Halides with multiple photoluminescence centers
    Angewandte Chemie, 2019
    Co-Authors: Jun Zhou, Zhiguo Xia, Maxim S Molokeev, Jing Zhao, Guojun Zhou, Viktoriia Morad, Maksym V Kovalenko
    Abstract:

    Very little is known about the realm of solid-state Metal halide compounds comprising two or more haloMetalate anions. Such compounds would be of great interest if their optical and electronic properties could be rationally designed. Herein, we report a new example of Metal halide cluster-assembled compound (C9 NH20 )9 [Pb3 Br11 ](MnBr4 )2 , featuring distinctly different anionic polyhedra, namely, a rare lead halide cluster [Pb3 Br11 ]5- and [MnBr4 ]2- . In accordance with its multinary zero-dimensional (0D) structure, this compound is found to contain two distinct emission centers, 565 nm and 528 nm, resulting from the formation of self-trapped excitons and 4 T1 -6 A1 transition of Mn2+ ions, respectively. Based on the high durability of (C9 NH20 )9 [Pb3 Br11 ](MnBr4 )2 upon light and heat, as well as high photoluminescence quantum yield (PLQY) of 49.8 % under 450 nm blue light excitation, white light-emitting diodes (WLEDs) are fabricated, showcasing its potential in backlight application.

  • lead free hybrid Metal Halides with a green emissive mnbr4 unit as a selective turn on fluorescent sensor for acetone
    Inorganic Chemistry, 2019
    Co-Authors: Jun Zhou, Zhiguo Xia, Zheshuai Lin, Maxim S Molokeev, Xingxing Jiang, Jing Zhao
    Abstract:

    Organic-inorganic hybrid Metal Halides with zero-dimensional (0D) structure has emerged as a new class of light-emitting materials. Herein, a new lead-free compound (C9NH20)2MnBr4 has been discovered and a temperature-dependent phase transition has been identified for two phases (space group P21/c and C2/c) in which individual [MnBr4]2- anions connect with organic cations, (C9NH20+) (1-buty-1-methylpyrrolidinium+), forming periodic structure with 0D blocks. A green emission band, peaking at 528 nm with a high photoluminescence quantum efficiency (PLQE) of 81.08%, has been observed at room temperature, which is originated from the 4T1(G) to 6A1 transition of tetrahedrally coordinated Mn2+ ions, as also elaborated by density functional theory calculation. Accordingly, a fast, switchable, and highly selective fluorescent sensor platform for different organic solvents based on the luminescence of (C9NH20)2MnBr4 has been developed. We believe that the hybrid Metal Halides with high PLQE and the exploration of these as a fluorescence sensor will expand the applications scope of bulk 0D materials for future development.

  • optically modulated ultra broad band warm white emission in mn2 doped c6h18n2o2 pbbr4 hybrid Metal halide phosphor
    Chemistry of Materials, 2019
    Co-Authors: Guojun Zhou, Zhiguo Xia, Zheshuai Lin, Maxim S Molokeev, Xingxing Jiang, Jing Zhao, Jing Wang
    Abstract:

    Finding new low-dimensional Metal Halides with broad-band emission is attracting interest in single-component phosphor for white light-emitting diodes (WLEDs). The full-spectrum white light still r...

Zheshuai Lin - One of the best experts on this subject based on the ideXlab platform.

  • lead free hybrid Metal Halides with a green emissive mnbr4 unit as a selective turn on fluorescent sensor for acetone
    Inorganic Chemistry, 2019
    Co-Authors: Jun Zhou, Zhiguo Xia, Zheshuai Lin, Maxim S Molokeev, Xingxing Jiang, Jing Zhao
    Abstract:

    Organic-inorganic hybrid Metal Halides with zero-dimensional (0D) structure has emerged as a new class of light-emitting materials. Herein, a new lead-free compound (C9NH20)2MnBr4 has been discovered and a temperature-dependent phase transition has been identified for two phases (space group P21/c and C2/c) in which individual [MnBr4]2- anions connect with organic cations, (C9NH20+) (1-buty-1-methylpyrrolidinium+), forming periodic structure with 0D blocks. A green emission band, peaking at 528 nm with a high photoluminescence quantum efficiency (PLQE) of 81.08%, has been observed at room temperature, which is originated from the 4T1(G) to 6A1 transition of tetrahedrally coordinated Mn2+ ions, as also elaborated by density functional theory calculation. Accordingly, a fast, switchable, and highly selective fluorescent sensor platform for different organic solvents based on the luminescence of (C9NH20)2MnBr4 has been developed. We believe that the hybrid Metal Halides with high PLQE and the exploration of these as a fluorescence sensor will expand the applications scope of bulk 0D materials for future development.

  • optically modulated ultra broad band warm white emission in mn2 doped c6h18n2o2 pbbr4 hybrid Metal halide phosphor
    Chemistry of Materials, 2019
    Co-Authors: Guojun Zhou, Zhiguo Xia, Zheshuai Lin, Maxim S Molokeev, Xingxing Jiang, Jing Zhao, Jing Wang
    Abstract:

    Finding new low-dimensional Metal Halides with broad-band emission is attracting interest in single-component phosphor for white light-emitting diodes (WLEDs). The full-spectrum white light still r...

  • recent advances and future perspectives on infrared nonlinear optical Metal Halides
    Coordination Chemistry Reviews, 2019
    Co-Authors: Pifu Gong, Fei Liang, Lei Kang, Xingguo Chen, Jingui Qin, Zheshuai Lin
    Abstract:

    Abstract Infrared (IR) nonlinear optical (NLO) materials are of current interest owing to their technological applications in many military and civil fields. Metal Halides are among the most favorable candidates for IR laser frequency conversion owing to their relatively large NLO effects, wide IR transparency and high laser damage thresholds (LDT). However, the comprehensive review for Metal Halides NLO materials is absent. Herein, we focus on the relationship between the structural features and NLO performances in the reported Metal halide NLO materials. In particular, Metal Halides are classified according to the NLO-active [MXk] anionic units and NLO-active cations, i.e., they are sorted into traditional Metal Halides containing linear units, triangle pyramidal units, tetrahedral units, rectangular pyramidal units, five-coordinated pseudo-octahedra, six- and more-coordinated polyhedral units, organic-inorganic and supramolecular Metal Halides. The determination rules of these microscopic structures on NLO properties in Metal Halides are summarized and analyzed on the basis of the combination of available experimental data and first-principles results. From the deduced structure-property relationship, the development prospects for NLO Metal Halides are discussed.

Gerd Meyer - One of the best experts on this subject based on the ideXlab platform.

  • identifying a structural preference in reduced rare earth Metal Halides by combining experimental and computational techniques
    Inorganic Chemistry, 2012
    Co-Authors: Simon Steinberg, Jakoah Brgoch, Gordon J Miller, Gerd Meyer
    Abstract:

    The structures of two new cubic {TnLa(3)}Br(3) (Tn = Ru, Ir; I4(1)32, Z = 8; Tn = Ru: a = 12.1247(16) A, V = 1782.4(4) A(3); Tn = Ir: a = 12.1738(19) A, V = 1804.2(5) A(3)) compounds belonging to a family of reduced rare-earth Metal Halides were determined by single-crystal X-ray diffraction. Interestingly, the isoelectronic compound {RuLa(3)}I(3) crystallizes in the monoclinic modification of the {TnR(3)}X(3) family, while {IrLa(3)}I(3) was found to be isomorphous with cubic {PtPr(3)}I(3). Using electronic structure calculations, a pseudogap was identified at the Fermi level of {IrLa(3)}Br(3) in the new cubic structure. Additionally, the structure attempts to optimize (chemical) bonding as determined through the crystal orbital Hamilton populations (COHP) curves. The Fermi level of the isostructural {RuLa(3)}Br(3) falls below the pseudogap, yet the cubic structure is still formed. In this context, a close inspection of the distinct bond frequencies reveals the subtleness of the structure determining factors.

Chen Lin - One of the best experts on this subject based on the ideXlab platform.

  • Efficient and bright warm-white electroluminescence from lead-free Metal Halides
    Nature Communications, 2021
    Co-Authors: Hong Chen, Lin Zhu, Chen Xue, Pinlei Liu, Kaichuan Wen, Hao Zhang, Chensheng Xiang, Chen Lin
    Abstract:

    AbstractSolution-processed Metal-halide perovskites are emerging as one of the most promising materials for displays, lighting and energy generation. Currently, the best-performing perovskite optoelectronic devices are based on lead Halides and the lead toxicity severely restricts their practical applications. Moreover, efficient white electroluminescence from broadband-emission Metal Halides remains a challenge. Here we demonstrate efficient and bright lead-free LEDs based on cesium copper Halides enabled by introducing an organic additive (Tween, polyethylene glycol sorbitan monooleate) into the precursor solutions. We find the additive can reduce the trap states, enhancing the photoluminescence quantum efficiency of the Metal halide films, and increase the surface potential, facilitating the hole injection and transport in the LEDs. Consequently, we achieve warm-white LEDs reaching an external quantum efficiency of 3.1% and a luminance of 1570 cd m−2 at a low voltage of 5.4 V, showing great promise of lead-free Metal Halides for solution-processed white LED applications.

Min Shi - One of the best experts on this subject based on the ideXlab platform.