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
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 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
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
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yubin Zhao,Xing Cao,Huanhui Chen,Ya Liu,Liubiao Zhong,Yejun Qiu
Low-dimensional metal halides are favored for optoelectronic device applications due to their strong electron–phonon coupling capability, which produces exciton self-trapping and broadband emission optoelectronic properties. Conventional methods for enhancing electron–phonon coupling involve the introduction of permanent defects or lattice distortions that inhibit the intrinsic structure and properties. In this work, we report that Cu-doped CsPb2Br5 nanocrystals exhibit broadband red emission with a high Stokes shift, a long fluorescence lifetime (9.27 μs), and a high photoluminescence quantum yield (∼ 36%) in the visible to near-infrared spectral range (∼550 to 825 nm). At the same time, the fact that the emission spectrum is independent of the excitation wavelength and the excitation spectrum is independent of the emission wavelength, together with the similarity of the decay kinetics, suggests that the broad-band emission has intrinsic properties. The soft vibrational modes of Raman spectroscopy indicate the softness of the lattice and the highly anharmonic character of the structure on the global and local scales. These properties lead to short-range elastic lattice deformation of Cu/CsPb2Br5 nanocrystals upon photoexcitation by strong electron–phonon coupling, resulting in self-trapped exciton emission. This method of doping-induced local distortion and exciton self-capture provides a way to improve the properties of the optoelectronic materials. Meanwhile, the fluorescence change in the crystal structure from CsPbBr3 to CsPb2Br5 can also be used for anticounterfeiting inks. Therefore, CsPb2Br5 crystals have promising applications in solid-state lighting and optoelectronic devices.
研究领域:
材料科学
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光学
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Siyu Li,Jiali Yao,Dayang Wang,Keke Huang,Wensheng Yang,Renguo Xie
Metal halides (MHs), specifically CsPbX3 (where X = Cl and Br), have garnered significant research interest due to excellent optoelectronic properties. However, most of these metal halides exhibit no red emission in the visible region. In this study, Cs2ZnCl4 powders in the presence of hydrochloric acid were synthesized through mechanical milling. X-ray diffraction (XRD) analyses revealed no detectable diffraction signals before or after acid treatment, suggesting a uniform crystal structure. The initial Cs2ZnCl4 powders displayed intrinsic blue emission centered at 486 nm, with a Photoluminescence Quantum Yield (PLQY) of approximately 5.07%. In contrast, the hydrochloric acid-treated Cs2ZnCl4 powder exhibited bright red emission centered at 645 nm, with a PLQY of about 12.78%. The broad emission, characterized by a full width at half maximum (FWHM) of 135 nm, was attributed to self-trapped exciton (STE) emission. X-ray photoelectron spectroscopy (XPS) analysis of Cs2ZnCl4 before and after acid treatment suggests that hydrochloric acid introduction may have induced distortions or defects in the coordination environment of Zn2+ ions. This provides a valuable route for further investigation into the optical properties of other metal halides.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Zhi-Cheng Zhang,Tie Zhang,Chang-Yuan Su,Meng-Meng Lun,Yi Zhang,Da-Wei Fu,Qi Wu
Lead-free Halides, especially Mn-based ones, are preferred as hotspots in the exploration of photoluminescent materials. However, there are few reports on sensitive reversible thermochromism and switchable dual emission originating from self-trapped exciton emission in pure Mn-Based materials. Here, we report a new Mn-based hybrid material [TMPA]2MnI4 (TMPA = trimethylphenylammonium), which shows two emission peaks at 545 and 660 nm benefitting from the d–d orbital transition of Mn2+ and the generation of self-trapped excitons, respectively. Due to the different sensitivity to temperature, the stages of thermal activation and thermal quenching of the two emission types are also inconsistent, showing a certain competition relationship and dominating the emission colors in different temperature ranges, resulting in adjustable green–orange–green thermochromic luminescence from 100 to 403 K (both high and low temperatures correspond to green, and orange is displayed at near room temperature). Therefore, thermochromic luminescence can be easily achieved by controlling the temperature under the guidance of excited states. This work provides new insights into the synthesis and application of thermochromic materials. Therefore, it is certain that regulating temperature while being guided by excited states will achieve thermochromic luminescence. This research offers fresh perspectives on the development and potential of thermochromic materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Dayu Huang,Qiuyun Ouyang,Jinjiang Wu,Youchao Kong,Bo Wang,Hongzhou Lian,Jun Lin
Broadband emission with a large Stokes shift is important to obtain an excellent color rendering index of the solid-state lighting device. Among low-dimensional material and perovskite-like phosphors with broadband self-trapped emission, Sn-based phosphors have attracted much attention due to their high photoluminescence quantum yield (PLQY). However, the disadvantage is that the synthesis of Sn-based phosphors needs to be performed in a glovebox. Upon photoexcitation, the broadband emission of self-trapped excitons results from exciton–phonon coupling induced by the transient distortion of the lattice. Low-dimensional material structures often promote self-trapped emission because of more vibrational degrees of freedom and easier polarization under photoexcitation. Here, zero-dimensional (0D) SnX2 (X = Br, I) single crystals are synthesized by the solvent evaporation method in the air. SnX2 emits blue light, broadband yellow light, and deep red light, among which SnBr2 has the best luminescence performance. The photoluminescence quantum yield (PLQY) of SnBr2 reaches 85% and the Stokes shift reaches 265 nm. The PL intensity of SnX2 is linearly related to excitation power, which preliminarily indicates that the origin of SnX2 luminescence is attributed to self-trapped emission (STE). The white light-emitting diodes (WLEDs) were fabricated using yellow-emitting SnBr2 and blue-emitting BaMgAl10O17:Eu2+, which has a low correlated color temperature (3160 K) and a relatively common color rendering index (79).
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Shuai Li,Chunrong Zhu,Jinjiang Wang,Zheling Zhang,Dongjie Wang,Yiwen Chen,Doudou Zhang,Jing Wang,Jian Zhang
The broad-band self-trapped exciton (STE) emission feature of lead-free halide double perovskites makes it challenging to realize emission with various wavelengths in a single material. Cs2NaInCl6:Sb3+ crystals with blue emission (440 nm) were synthesized by rationally introducing the Sb3+ ion into Cs2NaInCl6 with a photoluminescence quantum yield (PLQY) up to 99.35%. The Ln3+ (Tb3+ and Ho3+) ions were doped into Cs2NaInCl6:Sb3+ to achieve spectrally tunable emission from blue to green and pink emission owing to the energy transfer from the host STE to Ln3+ ions, with PLQY values of 90.68% and 61.87%, respectively. By carefully adjusting the doping level of Ln3+ ions, white light emission with a PLQY of 68.87% was achieved in the Tb3+ and Ho3+ co-doped Cs2NaInCl6:Sb3+ system. LED devices based on Sb3+/Ln3+ co-doped Cs2NaInCl6 with multicolor and white light emissions were fabricated based on these phosphors, which exhibit excellent spectral and environmental stability. The results show that double perovskite luminescence materials have potential for application in solid-state lighting and multi-color displays.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2020
·Vol. 7
·期 11
·2000195
·
IF 15.84
Linyuan Lian,Moyan Zheng,Weizhuo Zhang,Lixiao Yin,Xinyuan Du,Peng Zhang,Xiuwen Zhang,Jianbo Gao,Daoli Zhang,Liang Gao,Guangda Niu,Haisheng Song,Rong Chen,Xinzheng Lan,Jiang Tang,Jianbing Zhang
Radioluminescent materials (scintillators) are widely applied in medical imaging, nondestructive testing, security inspection, nuclear and radiation industries, and scientific research. Recently, all-inorganic lead halide perovskite nanocrystal (NC) scintillators have attracted great attention due to their facile solution processability and ultrasensitive X-ray detection, which allows for large area and flexible X-ray imaging. However, the light yield of these perovskite NCs is relatively low because of the strong self-absorption that reduces the light out-coupling efficiency. Here, NCs with self-trapped excitons emission are demonstrated to be sensitive, reabsorption-free scintillators. Highly luminescent and stable Cs 3 Cu 2 I 5 NCs with a photoluminescence quantum yields of 73.7%, which is a new record for blue emission lead-free perovskite or perovskite-like NCs, is produced with the assistance of InI 3 . The PL peak of the Cs 3 Cu 2 I 5 NCs locates at 445 nm that matches with the response peak of a silicon photomultiplier. Thus, Cs 3 Cu 2 I 5 NCs are demonstrated as efficient scintillators with zero self-absorption and extremely high light yield (≈79 279 photons per MeV). Both Cs 3 Cu 2 I 5 NC colloidal solution and film exhibit strong radioluminescence under X-ray irradiation. The potential application of Cs 3 Cu 2 I 5 NCs as reabsorption-free, low cost, large area, and flexible scintillators is demonstrated by a prototype X-ray imaging with a high spatial resolution.
研究领域:
材料科学
·
光学
·
放射学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Photonics Research
·
2021
·Vol. 9
·期 3
·351-356
·
IF 7.08
Qiang Xu,Juan Wang,Qindong Zhang,Xiao Ouyang,Xiao Ouyang,Maheng Ye,Weiting Xie,Xuewen Yan,Deyuan Li,Xiaoping Ouyang,Xiaoping Ouyang,Xiaoping Ouyang,Xiaobing Tang,Xiaodong Zhang
Bulk scintillators that are with high density, low cost, and fine pulse-height energy spectral resolution, and are non-hygroscopic and user friendly, are desired for high-energy gamma-ray spectroscopy application. Recently, low-cost solution-processed perovskite nanoscintillators have been demonstrated with outstanding performances for indirect low-energy X-ray detection; however, the stability and thickness are not suitable for high-energy gamma-ray detection. Here, we report scintillation performances of a low-cost solution-processed bulk 0D Cs3Cu2I5 single crystal. The self-trapped exciton emission results in a large Stokes shift (109 nm) that is reabsorption free. A broad X-ray excited emission matches well with the sensitivity of a silicon photodiode. The unique Cs+ surrounded isolated [Cu2I5]3− cluster scintillator provides ultra-stability in air and strong radiation hardness under high-dose gamma-ray exposure from a 60Co source. This solution-processed Cs3Cu2I5 scintillator is expected with low-cost and has detection performances comparable to commercial alkali-halide scintillator products.
研究领域:
材料科学
·
核技术应用
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 22
·7322-7329
·
IF 7.059
Da Chen,Fulong Dai,Shiqiang Hao,Guojun Zhou,Quanlin Liu,Christopher Wolverton,Jing Zhao,Zhiguo Xia
Organic–inorganic hybrid metal halides have received extensive attention owing to their versatile structures and optoelectronic properties. Herein, we report two lead-free metal halides, (PMA)3BiBr6 and (PMA)3SbBr6 [PMA+: (C6H5CH2NH3)+, as the abbreviation of phenylmethylammonium], which possess iso-structural zero-dimensional structures and crystallize in the monoclinic space group P21/c. (PMA)3BiBr6 and (PMA)3SbBr6 exhibit optical band gaps of ∼3.50 and 3.40 eV, respectively, and density functional theory calculations reveal their indirect bandgap behaviors. Upon 350 and 425 nm excitation, (PMA)3BiBr6 and (PMA)3SbBr6 exhibit broadband emission peaking at 510 nm and 625 nm with wide full-widths at half-maximum of ∼153 and 175 nm, respectively. The emission mechanism of the metal halides is attributed to self-trapped exciton emission. The relationship between the crystal structure and luminescence intensity is also discussed. Finally, both metal halides have high decomposition temperatures and are stable for long-term storage under ambient conditions, demonstrating their potential for optoelectronic applications.
研究领域:
材料科学
·
光学
✓ 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）