JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Shujun Zhu,Jianguo Pan,Xinxin Chen,Hongbing Chen,Shangke Pan
Recently, zero-dimensional organic-inorganic lead halides perovskites have garnered considerable attention due to their exceptional photoelectric performance, however, the toxicity of lead makes their prolonged application difficult. In this work, centimeter-scale lead-free zero-dimensional perovskites [Emim] 4 [Cu 4 I 8 ] single crystals were grown by the solution evaporation method. The structure and composition of the crystals were analyzed using XRD , EDS , XPS , etc. The energy band structure and the partial density of states (PDOS) were calculated by using the density functional theory (DFT) based on the PBE hybrid functional. The excitation and emission spectra of the crystal material were determined under different conditions. The luminescence mechanism and fluorescence lifetime of the crystal were also analyzed, and the green emitting of the crystal was caused by self-trapped excitons (STEs). Interestingly, the compound showed excellent responsiveness to X-rays, which is rarely reported in organic-inorganic hybrid copper-based halides. Overall, [Emim] 4 [Cu 4 I 8 ] demonstrates its good potential.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 45
·16562-16567
·
IF 4.39
Ru-Ling Tang,Xin Lian,Wen-Dong Yao,Wenlong Liu,Sheng-Ping Guo
Metal halides have potential applications in many optics-related fields, such as birefringence materials. Here, a pentanary fluoride K3Na(TaF7)(SiF6) has been obtained through a facile hydrothermal route. It crystallizes in the orthorhombic space group Immm, and its zero-dimensional framework features isolated SiF6 octahedra and TaF7 monocapped trigonal prisms, a new type of combination representing a new structure-type. It exhibits two wide optical band gaps of 4.46 eV and 5.67 eV which is consistent with DFT calculation. K3Na(TaF7)(SiF6) exhibits a larger birefringence (0.045 at 253.7 nm) compared with the commercial MgF2 crystal.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 40
·7081-7089
·
IF 3.545
Qi-Ming Qiu,Ke-Ning Sun,Guo-Yu Yang
Five new rubidium borates, namely Na1/3Rb5/3[B4O5(OH)4] (1), Rb4[B12O18(OH)4] (2), Rb2Ba[B12O18(OH)4] (3), Rb2[B5O8(OH)] (4) and NaRb0.5[B6O10]·0.5H3O (5) have been synthesized under solvothermal conditions. Compound 1 features a 0D structure composed of [B4O5(OH)4]2− clusters. After changing the metal salt, new cyclic [B12O20(OH)4]8− clusters in 2 and 3 are formed, resulting in 1D chains. Such a chain structure is first discovered in dodecaborates. By tuning the reaction temperature and pH of the reaction media, compound 4 with a 4-connected 2D oxoboron layer constructed from partially protonated [B5O10(OH)]6− and compound 5 with a 6-connected 3D framework constructed from [B6O13]8− clusters are successfully isolated. Since compounds 1 and 4 crystallize in the non-centrosymmetric (NCS) space group, second harmonic generation (SHG) measurements and dipole moment calculations have been carried out. The SHG response of 4 is 2.0 times that of KH2PO4 (KDP), which is higher than those of related analogues.
研究领域:
材料化学
·
晶体学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Pifu Gong,Siyang Luo,Ke Xiao,Qian Huang,Yi Yang,Hongwei Huang,Yicheng Wu,Chuangtian Chen,Zheshuai Lin
A new perovskite stoichiometric alkali tin dihalides compound, Cs3Sn3F2Cl7, is synthesized by a hydrothermal method. This compound belongs to the monoclinic space group of P21/c with cell parameters of a = 9.5645(4) Å, b = 14.2057(7) Å, c = 13.5828(6) Å, and β = 93.2450(10)°. Unlike the common perovskites in which octahedra are interconnected to be a three-dimensional network, Cs3Sn3F2Cl7 possesses a zero-dimensional structure consisting of Cs+ cations, isolated [SnCl3]− trigonal pyramids, and dimer structural units [Sn2F2Cl4]2–; the latter microscopic unit is found for the first time. The thermal stability and UV–vis–NIR diffuse reflectance spectroscopy in Cs3Sn3F2Cl7 are measured, and the electronic structure is calculated. Interestingly, the 5s2 lone-pair electrons on Sn2+ cations are stereochemically active, which results in a pretty good photocatalytic activity of the title compound.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2025
·
IF 6.4
Qi Wang,Jian-Qiang Zhao,Peng-Yao Xuan,Xin-Yuan Li,Zhao-Xi Wang,Hao-Shuo Lu,Xiao-Wu Lei,Zhihong Jing,Cheng-Yang Yue
Zero-dimensional (0D) metal halides-based room-temperature phosphorescence (RTP) materials have received extensive attention with wide application prospects, but remains to suffer from low phosphorescence efficiency, which restricts their progress in cutting-edge photonic applications. In this work, a new zero-dimensional (0D) cadmium halide [BTPP]2CdBr4 (BTPP = benzyl triphenylphosphonium bromide) has been successfully synthesized through room-temperature solution method. Under excitation of 357 nm and 309 nm UV light, [BTPP]2CdBr4 displays dual blue fluorescence and green phosphorescence with lifetimes of 1.38 ns and 76.18 ms, respectively. The quantum yield of phosphorescence reaches up to be 43.68%, which exceeds most of the 0D metal halide-based RTP materials. Detailed experimental characterizations and theoretical calculations demonstrate that the fluorescence and phosphorescence originate from the radiative recombination of singlet self-trapped excitons (STEs) and triplet π-π* charge transfer in [BTPP]+ cation, respectively. Benefitting from the dual luminescence, [BTPP]2CdBr4 can be explored as dual space- and time-resolved luminescent label with applications in anti-counterfeiting and information security, etc. This work provides a fundamental structural engineering strategy to design highly efficient 0D metal halides-based RTP materials.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jiawei Lin,Niu Sun,Ruonan Yao,Kunjie Liu,Zhongnan Guo,Jing Zhao,Quanlin Liu,Wenxia Yuan
Low-dimensional organic–inorganic metal halides (OIMHs) have been explored as single-component white light emitters for applications in solid-state lighting. Herein, we report a zero-dimensional (0D) In-based OIMH (TMPDA)[InCl5(H2O)] (TMPDA = N,N,N′,N’-tetramethyl-1,4-phenylenediamine), which crystallizes in the noncentrosymmetric P212121 space group and contains hydrogen bonds between the adjacent [InCl5(H2O)]2– octahedra in structure. It exhibits a large optical band gap (4.10 eV) and dual-band emission under UV light. Spectroscopic analysis and theoretical calculation indicate that the high (404 nm)- and low (513 nm)-energy emissions are attributed to the bound excitons in organic ligands and self-trapped excitons in [InCl5(H2O)]2– units, respectively. It is found that Sb doping in this 0D hybrid provides additional orange (590 nm) emission assigned to the 3P1 → 1S0 triplet radiative recombination. By adjusting the doping level, the emission color can be turned from turquoise to orange, and interestingly, a single-component white-light emission is realized by balancing the high-energy emission from organic ligand, the turquoise emission from [InCl5(H2O)]2–, and the orange one from [SbCl5(H2O)]2–. This work not only provides a new OIMH showing the single-component white light emission but also demonstrates the potential of In-based hybrids with hydrogen bonds for solid-state luminescence.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 36
·15285-15291
·
IF 7.79
Xiaoyu Wang,Qibin Shen,Yansong Chen,Nasir Ali,Ziyang Ren,Gang Bi,Huizhen Wu
The toxicity of Pb in conventional perovskites impedes the commercialization of their optoelectronic devices. Therefore, the search for comparable Pb-free perovskites is vital and needs urgent attention. Herein, for the first time, we successfully synthesize the Sn(II)-doped Pb-free zinc-based perovskite variant Cs2ZnCl4. The influence of doping is investigated both experimentally and theoretically. Broad bright red emission with a large Stokes shift is observed and attributed to the self-trapped exciton (STE) emission of the doped disphenoidal [SnCl4]2− units in the host matrix, from 3P1 to 1S0. Temperature-dependent photoluminescence (PL) shows a peak split at cryogenic temperature, which is ascribed to the Jahn–Teller effect of the 3P1 state. Theoretical study reveals that the impurity states of Sn2+ shrink the bandgap and localize the band edges, and distortion of [SnCl4]2− under excitation ultimately leads to the STE emission. This work is significant for STE emission studies and will pave a way for Pb-free perovskite variants in illumination applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 38
·7776-7782
·
IF 3.879
Xiang Xu,Chun-Li Hu,Bing-Ping Yang,Jiang-Gao Mao
Systematic explorations of new compounds in the unexplored Ag+–Mn2+/Mn3+–iodate system led to three new silver Mn2+ (or Mn3+)-mixed metal iodates, namely, AgMn(IO3)3, AgMn(IO3)4 and Ag3Mn(IO3)6. These compounds feature the same building units of MnO6 octahedron and IO3, but the different coordination modes of the iodate groups in these compounds led to three different types of anionic structures ranging from a zero-dimensional (0D) cluster to a two-dimensional (2D) layer. Interestingly, the dimensions of the anionic structure decrease with an increase in the IO3/Mn molar ratio in the formula. AgMn(IO3)3 exhibits a 2D [Mn2(IO3)6]n2n− anionic layer in which the Mn2O2 rings are further decorated by terminal iodates and interconnected by bidentate and tridentate bridging iodate groups. AgMn(IO3)4 displays a one-dimensional (1D) [Mn(IO3)4]nn− anionic chain in which each pair of MnO6 octahedra is bridged by a pair of IO3 groups, and within the chain each manganese center is also attached with two terminal iodate groups from both sides of the chain. Ag3Mn(IO3)6 features isolated 0D [Mn(IO3)6]3− anions. The Ag+ cations in all three compounds act as spacers between these anions. Optical, thermal stability and magnetic susceptibility measurements for AgMn(IO3)3 and AgMn(IO3)4 have also been performed.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Ya-Meng Chen,Yang Zhou,Qing Zhao,Jun-Ying Zhang,Ju-Ping Ma,Tong-Tong Xuan,Shao-Qiang Guo,Zi-Jun Yong,Jing Wang,Yoshihiro Kuroiwa,Chikako Moriyoshi,Hong-Tao Sun
All-inorganic perovskites have emerged as a new class of phosphor materials owing to their outstanding optical properties. Zero-dimensional inorganic perovskites, in particular the Cs4PbBr6-related systems, are inspiring intensive research owing to the high photoluminescence quantum yield (PLQY) and good stability. However, synthesizing such perovskites with high PLQYs through an environment-friendly, cost-effective, scalable, and high-yield approach remains challenging, and their luminescence mechanisms has been elusive. Here, we report a simple, scalable, room-temperature self-assembly strategy for the synthesis of Cs4PbBr6/CsPbBr3 perovskite composites with near-unity PLQY (95%), high product yield (71%), and good stability using low-cost, low-toxicity chemicals as precursors. A broad range of experimental and theoretical characterizations suggest that the high-efficiency PL originates from CsPbBr3 nanocrystals well passivated by the zero-dimensional Cs4PbBr6 matrix that forms based on a dissolution–crystallization process. These findings underscore the importance in accurately identifying the phase purity of zero-dimensional perovskites by synchrotron X-ray technique to gain deep insights into the structure–property relationship. Additionally, we demonstrate that green-emitting Cs4PbBr6/CsPbBr3, combined with red-emitting K2SiF6:Mn4+, can be used for the construction of WLEDs. Our work may pave the way for the use of such composite perovskites as highly luminescent emitters in various applications such as lighting, displays, and other optoelectronic and photonic devices.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 17
·9727-9732
·
IF 6.895
Qiang Xu,Juan Wang,Wenyi Shao,Xiao Ouyang,Xiang Wang,Xinlei Zhang,Yong Guo,Xiaoping Ouyang
Low dimensional scintillators have been successfully and widely applied in the radiation-detection community for home security, scientific research, and imaging. We have grown zero-dimensional Cs4PbBr6 materials with CsPbBr3 nanocrystals embedded by using a solution-growth method at low temperature. We have demonstrated the scintillation properties of these 0D nanoscintillators with high luminescence quantum efficiency for green light. In addition, we have successfully achieved pulse height spectra with this 0D perovskite material, which has been demonstrated with fast decay time (<10 ns), high energy resolution (3.0 ± 0.1%, 59.5 keV from 241Am), high light yield (64 000 photons per MeV) and long term stability under various atmospheres (moisture, radiation). These results are much better than those of the most widely used commercial products such as NaI(Tl). It also demonstrates that this 0D all-inorganic material can be employed as a scintillator for ionization radiation applications such as X-ray imaging and spectroscopy applications.
研究领域:
材料科学
·
辐射探测技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 22
·5932-5940
·
IF 7.779
Yufei Song,Shaoxin Cui,Zhen Qian,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongping Wu
Three new chalcohalide nonlinear optical crystals, [ASr4Cl][Ge3S10] (A = Na, K) and [KBa4Cl][Ge3S10], have been successfully designed and synthesized by combining the covalent [Ge3S9] clusters and ionic [AB4Cl] frameworks. Their crystal structures were determined by single crystal X-ray diffraction, which showed that all three compounds crystallized in the noncentrosymmetric and polar space group of P63. Three structures are iso-structural and can be seen as salt-inclusion structures with the isolated [Ge3S9] clusters stacked alternately along the c axis and 1∞[ClNaSr(2)3]6+ chains acting as scissors to cut the connection between the [Ge3S9] clusters, which is still rare in the known chalcohalides. The IR and Raman spectra indicate that [ASr4Cl][Ge3S10] (A = Na, K) and [KBa4Cl][Ge3S10] have wide IR transparent windows up to 20 μm. UV-Vis-NIR diffuse reflectance spectra manifest that all three compounds have large band gaps of 3.54, 3.51, and 3.57 eV, respectively. In addition, the title compounds also exhibit large laser damage thresholds (∼12 × AgGaS2) and moderate SHG responses (1.08, 0.91, and 0.82 × AgGaS2, respectively). These properties demonstrate their potential as IR NLO crystals. Furthermore, the influence of the (M + N)/Q ratios (M = IIIA or IVA, N = IB or IIB or cations coordinated as [MxQy] anionic groups; Q = S, Se) on the anionic group structural dimensions was discussed, and the structure–property relationship was also studied based on the first-principles calculations. These may produce some insights for designing new chalcohalides.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Junheng Yuan,Tianchi Wang,Yu Zhang,Shuyi Yao,Lulu Han,Dedan Mu,Hao Song,Jiayi He,Feng Zhang,Xuhui Xu
Due to the increasingly complex network attacks and advancements in computational technology, finding new and efficient encryption techniques is an urging task. As a promising material, the application of perovskite luminescent materials in information encryption is limited to pre-planned specific scenarios or applications, lacking the ability to respond to temporary demands. In this work, we have designed a novel cadmium-based zero-dimensional perovskite, TEA 2 CdCl 4 , which presents blue luminescence centered at 413 nm originating from organic cations. Upon Sb 3+ doping, it not only exhibits intense red emission at 623 nm with a high photoluminescence quantum efficiency up to 100 %, but also brings outstanding resistance to thermal quenching. Especially, an ultrafast response speed could be achieved during decryption process which has been verified by first-principles calculations. Based on the advantages, a large-area optical anti-counterfeiting paper for temporary information encryption transmission is designed, which not only verifies the potential for secure information transmission and protection, but also introduces a new concept for the application of organic–inorganic hybrid perovskites in the field of information encryption.
研究领域:
材料科学
·
光学
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）