Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 17
·4035-4043
·
IF 6.569
Ruxin Liu,Wenjun Zhang,Guojing Li,Wenjing Liu
Advanced anti-counterfeiting materials have great research significance in the fields of economy, safety and human health. Compared with independent color mixed anti-counterfeiting materials, ultraviolet (UV) excitation wavelength-dependent discoloration, which can realize the change of the emission peak shape and color under different excitation wavelengths, is more attractive. In this work, the Sb-doped Cs2ZrCl6 vacancy-ordered double perovskite was designed and synthesized for anti-counterfeiting materials. Due to the singlet and triplet transitions of Sb3+ ions and self-trapping exciton (STE) emission of the Cs2ZrCl6 host, the material showed emission variability from blue to orange-yellow color. In addition, room temperature synthesis and excellent air and humidity stability further enhanced the potential of Sb-doped Cs2ZrCl6 for application.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
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
Advanced Photonics Research
·
2022
·Vol. 3
·期 4
·2100289
·
IF 0
Xixi Zheng,Jinxin Huang,Yaoyu Liu,Tianyu Wang,Shiguo Han,Zongqi Wang,Bing Teng,Shaohua Ji
Owing to their excellent photoelectric properties, perovskite materials have broad application prospects; however, the toxicity of Pb limits the application of Pb-based perovskite materials. To overcome this problem, Pb-free perovskite materials are prepared by replacing Pb with nontoxic elements including Ge and Sn; nevertheless, the stabilities of these materials are low. Herein, single crystals of nontoxic Cu(I)-based ternary metal halide (Cs 3 Cu 2 Br 5 ) with outstanding stabilities and self-trapped excition (STE) emission are constructed by an antisolvent method for the first time; these crystals exhibit central blue emission at 458 nm and large Stokes shifts. Photoluminescence (PL) intensities of the single crystals remain above 96.9% of their initial intensities when these crystals are exposed to an atmospheric environment for 90 days. Moreover, the stabilities of the Cs 3 Cu 2 Br 5 single crystals are investigated by temperature-dependent PL spectroscopy, which suggests a considerable exciton binding energy of 503 meV, and derivative thermogravimetric analysis, which indicate that the temperature of complete decomposition of Cs 3 Cu 2 Br 5 is above 930 °C. Furthermore, a new class of white light-emitting diodes with an ultrahigh color rendering index of 97.8 and satisfactory performance is produced using the Cs 3 Cu 2 Br 5 single crystals. The study demonstrates significant potentials of Cu(I)-based single crystals in the field of optoelectronics.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xianfu Meng,Qilin Wei,Wenchao Lin,Tao Huang,Shuaigang Ge,Zongmian Yu,Bingsuo Zou
Metal halide perovskites have flexible crystal and electronic structures and adjustable emission characteristics, which have very broad applications in the optoelectronic field. Among them, all-inorganic perovskites have attracted more attention than others in recent years because of their characteristics of large diffusion length, high luminescence efficiency, and good stability. In this work, Sb3+-doped RbCdCl3 crystalline powder was synthesized by a simple hydrothermal method, and its luminescence properties were studied, which showed a broad emission band with a large Stokes shift and efficient yellow light emission at about 596 nm at room temperature with a photoluminescence quantum yield of 91.7%. The emission came from the transition of the self-trapped exciton 1 (STE1) out of 3Pn (n = 0, 1, and 2) to S0 due to strong electron–phonon coupling, which scaled with increasing temperature. Moreover, its emission color became white at low temperatures due to the occurrence of transition of other self-trapped exciton 0 (STE0) state emission out of the 1S states of Sb ions to S0 in the lattice. These emission color changes may be used for temperature sensing, and this Sb3+-doped RbCdCl3 material expands the knowledge of the efficient luminescent inorganic material family for further applications of all-inorganic perovskites.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 7
·2103724
·
IF 17.521
Xingwen Cheng,Zhi Xie,Wei Zheng,Renfu Li,Zhonghua Deng,Datao Tu,Xiaoying Shang,Jin Xu,Zhongliang Gong,Xingjun Li,Xueyuan Chen
Fundamental understanding of the effect of doping on the optical properties of 3D double perovskites (DPs) especially the dynamics of self-trapped excitons (STEs) is of vital importance for their optoelectronic applications. Herein, a unique strategy via Cu + doping to achieve efficient STE emission in the alloyed lead-free Cs 2 (Ag/Na)InCl 6 DPs is reported. A small amount (1.0 mol%) of Cu + doping results in boosted STE emission in the crystals, with photoluminescence (PL) quantum yield increasing from 19.0% to 62.6% and excitation band shifting from 310 to 365 nm. Temperature-dependent PL and femtosecond transient absorption spectroscopies reveal that the remarkable PL enhancement originates from the increased radiative recombination rate and density of STEs, as a result of symmetry breakdown of the STE wavefunction at the octahedral Ag + site. These findings provide deep insights into the STE dynamics in Cu + -doped Cs 2 (Ag/Na)InCl 6 , thereby laying a foundation for the future design of new lead-free DPs with efficient STE emission.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Shu-Yi Yao,Hao Li,Min Zhou,Tian-Chi Wang,Xue Yu,Yin-Sheng Xu,Jian-Hong Yi,Jian-Bei Qiu,Jie Yu,Xu-Hui Xu
X-rays play an extremely significant role in medical diagnosis, safety testing, scientific research, and other practical applications. However, as the main sources of radioactive pollution, the hazard of X-rays to human health and the environment has been a major concern. Herein, the explored perovskite scintillator of Cs2Zr1–xPbxCl6 in this work exhibits an ultrahigh radioluminescence intensity owing to the enhanced X-ray absorption for the introduction of Pb2+ ions. The Cs2Zr1–xPbxCl6 crystals are demonstrated as efficient scintillators with a self-trapped exciton emission and extremely high steady-state light yield (∼101,944 photons meV–1). This fascinating scintillator provides a convenient visual tool for X-ray detection even for an indoor lighting environment, reaching a low detection limit of ∼14.2 nGy·s–1, which is about 1/387 of the typical medical imaging dose (5.5 μGy·s–1). Moreover, X-ray imaging with a high resolution of 16.6 lp·mm–1 is achieved with the as-explored Cs2Zr1–xPbxCl6 scintillator film. Herein, the Cs2Zr1–xPbxCl6 scintillator provides a feasible strategy for X-ray monitoring in the field of biomedicine, high-energy physics, national security, and other applications.
研究领域:
材料科学
·
医学成像
·
辐射探测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Hui Peng,Wei Tian,Qilin Wei,Linghang Kong,Guang Dai,Jialong Zhao,Bingsuo Zou
Recently, Sb 3+ -activated 0D Zr(IV)-based metal halides have gained enormous attention for their unique optical properties. However, realizing efficient white emission and multiple reversible emissions in a single system remains a great challenge. Parallelly, the currently reported Sb 3+ -activated Zr(IV)-based organic metal halides are mainly through aimless regulation of the type of A-site organic cations, severely limiting their development. Herein, all-inorganic Cs 2 ZrCl 6 :Sb 3+ is employed as the conformational model, three different compounds of Sb 3+ -doped [18-crown-6@A] 2 ZrCl 6 (A = K, Rb, Cs) are developed via supramolecular assembly. All compounds show efficient tunable white emission with luminous efficiency of 91.28% for [18-crown-6@K] 2 ZrCl 6 :Sb 3+ , 84.84% for [18-crown-6@Rb] 2 ZrCl 6 :Sb 3+ , and 78.63% for [18-crown-6@Cs] 2 ZrCl 6 :Sb 3+ , which shall stem from Sb 3+ -induced multi-exciton emission in [SbCl 6 ] 3− octahedron. Particularly, the strong supramolecular interaction can enhance the structural rigidity and suppress nonradiative transitions, which is the dominated reason for [18-crown-6@A] 2 ZrCl 6 :Sb 3+ exhibits efficient emission. The component/excitation/temperature/moisture-dependent multiple reversible PL switching characteristics are observed in Sb 3+ -doped [18-crown-6@A] 2 ZrCl 6 , which allows to demonstrate their applications in advanced optical anti-counterfeiting and information encryption. Moreover, a single-component white light-emitting diode is also fabricated, which shows a high color rendering index of 96.1. Therefore, the work provides a feasible scheme for designing organic Zr(IV) halides with fascinating optical properties.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 13
·4997-5003
·
IF 6.482
Jun Zhou,Ximing Rong,Maxim S. Molokeev,Yulong Wang,Xiangyan Yun,Denghui Xu,Xiong Li
Doping or alloying in perovskites and perovskite variants provides a promising way for modulating the electronic and photoluminescence properties and the structural stability. In this work, a series of yellow-emitting Rb2−xCsxZrCl6:Te4+ solid solution phosphors were prepared by a hydrothermal method, and their broad emission is assigned to the triplet 3P1–1S0 self-trapped excitons (STEs). Upon increasing the alloying ion Cs+, the yellow emission can be greatly enhanced by a stronger Jahn–Teller distortion. Moreover, Cs2ZrCl6:Te4+ shows a high photoluminescence quantum yield (PLQY), and impressive thermal and anti-water stability. This doping–alloying strategy presents a new direction towards designing lead-free, high-performance and stable perovskite derivatives.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 13
·期 6
·2402556
·
IF 8
Yihan Liu,Zhichao Zhang,Yingjie Mao,Kai Liu,Denghui Xu,Dan Liu,Xiong Li,Jun Zhou
Doping lanthanide ions in double perovskites (DPs) offers a promising approach to tailor optical and optoelectronic properties for versatile applications. However, achieving efficient and thermal stable DPs remains a significant challenge. In this paper, a series of Cs 2 KInCl 6 :Yb 3+ ,Er 3+ DPs with a negative thermal quenching behavior and high sensitivity are fabricated. The intrinsic luminescence properties of Cs 2 KInCl 6 are studied with a broad intrinsic self-trapped excitons (STEs) emission peak at 500 nm, which can be enhanced by doping Er 3+ ions accompanied with greater distortion of the [InCl 6 ] 3− octahedrons as well as multiple characteristic emission modes of Er 3+ under ultraviolet and near-infrared excitation. Notably, the addition of sensitizer Yb 3+ ions leads to the enhanced up-conversion emission of Er 3+ (up-conversion quantum yield up to 1.66%), anti-thermal quenching performance brought by the phonon-assisted energy transfer up-conversion process, as well as high sensitivity and reproducibility based on fluorescence intensity ratio technology. This work provides an effective strategy to enhance the STEs emission of DPs and achieve efficient optical temperature sensors through lanthanide ions doping.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Heng Guo
Low-dimensional metal halides, which possess efficient luminescent properties, have garnered significant interest in the fields of optoelectronics and radiation detection. This study introduces novel lead-free silver-based metal halide material, CsAgCl 2 microcrystals (MCs). These MCs have a one-dimensional atomic chain structure and a unique [AgCl 5 ] 4- tetragonal shared triangular configuration. CsAgCl 2 MCs exhibit excellent performance as X-ray scintillators due to their bright broadband yellow emission and fast decay time in the microsecond range. The large Stokes shift of 350 nm is produced by self-trapped exciton emission. In X-ray scintillation applications, CsAgCl 2 MCs demonstrate a high light yield of 13280 photons/MeV and a wide range of linear scintillation response. It is noteworthy that the CsAgCl 2 MCs maintain good stability under both atmospheric conditions and continuous X-ray irradiation. The sample was used in an X-ray imaging screen, which clearly presented the X-ray projection image of a wooden stick. As a result, this research not only contributes to the collection of lead-free metal halide scintillators but also indicates that CsAgCl 2 MCs have a wide range of future applications and potential in areas such as medical imaging, scientific research, and diagnostic and detection technologies.
研究领域:
材料科学
·
辐射检测
·
医学影像
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hui Peng,Xinxin Wang,Ye Tian,Bingsuo Zou,Fan Yang,Tao Huang,Chengyu Peng,Shangfei Yao,Zongmian Yu,Qingrong Yao,Guanghui Rao,Jianping Wang
Zero-dimensional lead-free organic–inorganic hybrid metal halides have drawn attention as a result of their local metal ion confinement structure and photoelectric properties. Herein, a lead-free compound of (Gua)3Cu2I5 (Gua = guanidine) with a different metal ion confinement has been discovered, which possesses a unique [Cu2I5]3– face-sharing tetrahedral dimer structure. First-principles calculation demonstrates the inherent nature of a direct band gap for (Gua)3Cu2I5, and its band gap of ∼2.98 eV was determined by experiments. Worthy of note is that (Gua)3Cu2I5 exhibits a highly efficient cool-white emission peaking at 481 nm, a full-width at half-maximum of 125 nm, a large Stokes shift, and a photoluminescence quantum efficiency of 96%, originating from self-trapped exciton emission. More importantly, (Gua)3Cu2I5 single crystals have a reversible thermoinduced luminescence characteristic due to a structural transition scaled by the electron–phonon coupling coefficients, which can be converted back and forth between cool-white and yellow color emission by heating or cooling treatment within a short time. In brief, as-synthesized (Gua)3Cu2I5 shows great potential for application both in single-component white solid-state lighting and sensitive temperature scaling.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 23
·7374-7383
·
IF 7.393
Qing Yao,Jie Zhang,Kaiyu Wang,Lin Jing,Xiaohua Cheng,Chenyu Shang,Jianxu Ding,Weiwei Zhang,Haiqing Sun,Tianliang Zhou
Fully inorganic perovskite materials of the Cs–Pb–Br system have been developing rapidly because of their overwhelming stabilities and splendid optoelectronic performance. However, there are few investigations on the parallel system of Cs–Pb–Cl, let alone the two-dimensional (2D) CsPb2Cl5. To fill in the gaps about CsPb2Cl5, we successfully grew large-scale CsPb2Cl5 single crystals (SCs) and partially substituted by Br. The quintessential 2D crystal structure determines the morphology character of slices, with a tetragonal system (I4/mcm). The ledge-connected [Cs–Cl]10 polyhedrons and face-connected [Pb–Cl]8 polyhedrons endow them with asymmetry and further bring crystal lattice distortions, which is beneficial for self-trapped exciton (STE) emission. Additionally, the band gap of the transparent CsPb2Cl5 SC is confirmed to be ∼4.01 eV. The photoluminescence (PL) of CsPb2Cl5 SC is dependent on the excitation energies. Exciton emission centered at 2.32 eV is predominant under higher energy excitation (>3.85 eV), whereas STE emission centered at 1.8 eV with a broad band (FWHM > 120 nm) is the unique emission when the excitation energy is lower than 3.85 eV. In addition, appropriate replacement of Cl with Br can bring larger lattice distortion and facilitate STE emission.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
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