Journal of Materials Chemistry C
·
2022
·Vol. 11
·期 3
·1095-1102
·
IF 8.067
Chen Fang,Jiakai Yang,Guojun Zhou,Zhichao Zhang,Yingjie Mao,Xiangyan Yun,Libo Liu,Denghui Xu,Xiong Li,Jun Zhou
Rare earth ion doping in metal halides has been a promising method for imparting and tailoring their optical and optoelectronic performances towards versatile optical applications. In this work, the relationships among intrinsic self-trapped excitons (STEs), sub-band gap defects and rare earth ions Tb3+ in Cs2ZrCl6:Tb3+ perovskite variants were established. Cs2ZrCl6 exhibits dual emission, deriving from the intrinsic STEs and sub-band gap defects owing to the Zr4+ or Cl− vacancies, respectively. Doping Tb3+ facilitated the characteristic emission (5D4–7FJ=6,5,4,3) of Tb3+ ions and the energy transfer from STEs to Tb3+ ions. Moreover, the participation of defect states and thermally activated delayed fluorescence (TADF) might lead to a high concentration of STEs, which in turn causes the abnormal thermal quenching effect. These findings not only provide a more in-depth understanding of the luminescence properties of Cs2ZrCl6, but also provide a new direction towards achieving tunable emission colors based on the energy transfer from STEs to rare earth ions.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
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
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12342-12347
·
IF 2.7
Yu Qi,Chengyue Xin,Wenjun Zhang,Zhongfa Li,Zihan Chen,Zhongyu Duan
Te4+-doped Cs2ZrCl6 vacancy-ordered perovskites with excitation wavelength-dependent tunable color have been synthesised by a simple precipitation method at room temperature, with two luminescent centres originating from the Te4+ and the STE (self-trapping exciton) of the Cs2ZrCl6 itself, respectively. They exhibit two different emission characteristics at 254 nm and 365 nm excitation wavelengths. At an excitation wavelength of 254 nm, the emission characteristics allow Te4+-doped Cs2ZrCl6 to exhibit tunable emission from blue to white to yellow under the control of Te4+ doping. And the excitation wavelength of 365 nm shows yellow emission. Te4+ doped Cs2ZrCl6 phosphors were used for optical anti-counterfeiting, and the anti-counterfeiting patterns were well distinguished under 254 nm and 365 nm UV lamps, demonstrating the potential of this excitation wavelength-dependent tunable color material for optical anti-counterfeiting applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 16
·6133-6138
·
IF 6.482
Jun Zhou,Xiangyan Yun,Ruoyu Wang,Denghui Xu,Xiong Li
As a promising way to modulate the photoluminescence properties and stability of perovskites and perovskite variants, doping has attracted wide attention in the field of optical and optoelectronic applications. In this work, a series of all inorganic lead-free Sb3+-doped Cs2ZrCl6 vacancy-ordered perovskite variants were prepared by the hydrothermal method, and the Sb3+-doping leads to singlet and triplet state emissions, which are strongly dependent on the temperature and surrounding molecular environment. Furthermore, efficient energy transfer can be observed from self-trapped excitons (STEs) of [ZrCl6]2− octahedra to dopant Sb3+. Our results will shed light on the ns2 Sb3+-ion-doping-induced emissive mechanism and expand the understanding of the optoelectronic properties of the perovskite variant family.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Zhilin Li,Qiaoqiao Li,Mengyan Cao,Zhihui Rao,Xinyu Shi,Liujiang Zhou,Xiujian Zhao,Xiao Gong
Low-dimension perovskite materials have attracted wide attention due to their excellent optical properties and stability. Herein, Sb3+-doped Cs2ZrCl6 crystals are synthesized by a coprecipitation method in which Sb3+ ions partially replace Zr4+ ions. The Cs2ZrCl6:xSb3+ powder shows blue and orange–red emissions under a 254 and 365 nm light, respectively, due to the [ZrCl6]2– octahedron and [SbCl6]3– octahedron. The photoluminescence quantum yield (PLQY) of Cs2ZrCl6:xSb3+ (x = 0.1) crystals is up to 52.5%. According to experimental and computational results, the emission mechanism of the Cs2ZrCl6:xSb3+ crystals is proposed. On the one hand, a wide blue emission with a large Stokes shift is caused by the self-trapping excitons of [ZrCl6]2– octahedra under a 260 nm excitation. On the other hand, the luminescence mechanism of [SbCl6]3– octahedron is divided into two parts: 1P1 → 1S0 (490 nm) and 3P1 → 1S0 (625 nm). The broad-band emission, high PLQY, and excellent stability endow the Cs2ZrCl6:xSb3+ powders with the potential for the fabrication of white light-emitting diodes (WLEDs). A WLED device is fabricated using a commercial 310 nm NUV chip, which shows a high color rendering index of 89.7 and a correlated color temperature of 5333 K. In addition, the synthesized Cs2ZrCl6:xSb3+ crystals can be also successfully used for information encryption. Our work will provide a deep understanding of the photophysical properties of Sb3+-doped perovskites and facilitate the development of Cs2ZrCl6:xSb3+ crystals in encrypting multilevel optical codes and WLEDs.
研究领域:
材料科学
·
光学工程
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Guang-Xuan Zhang,Qiao-Yun Yin,Bing Wang,Li-Ying Liu,Li-Yuan Chang,Ru-Zhi Wang
All-inorganic lead-containing perovskites have shown strong luminescence, but the use of lead has hindered their commercial development due to its stability and toxicity. In this paper, we propose thermal precipitation in ionic liquids (ILs) for synthesizing Bi 3+ -doped Cs 2 ZrCl 6 double perovskites (Cs 2 ZrCl 6 :Bi 3+ (ILs)), which have a better crystallinity compared to the Cs 2 ZrCl 6 :Bi 3+ (HCl) synthesized by the traditional hydrochloric acid method. Most interestingly, the Cs 2 ZrCl 6 :Bi 3+ (ILs) exhibits ultra-high photoluminescence quantum yield (PLQY) of up to 78.52%, which is about three times higher than the Cs 2 ZrCl 6 :Bi 3+ (HCl) prepared by the traditional method. In addition, the PLQY of this paper is the highest in the reported works for the Cs 2 ZrCl 6 :Bi 3+ . It has been confirmed that the high PLQY of Cs 2 ZrCl 6 :Bi 3+ (ILs) is due to the interaction force between N atoms and perovskites in ionic liquid cations, and the cations in ionic liquids can improve the crystallinity of Cs 2 ZrCl 6 :Bi 3+ (ILs) double perovskite crystallites by passivating shallow defects. The research provides an alternative and efficient method for synthesizing stable lead-free double perovskites with good optical properties.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Hanqi Wei,Qihua Yang,Guihua Li,Xuan Liu,Junben Huang,Chujie Wang,Xiaoming Li,Gemei Cai
As one type of recent emerging lead-free perovskites, Cs 2 ZrCl 6 nanocrystals are widely concerned, benefiting from the eminent designability, high X-ray cutoff efficiency, and favorable stability. Improving the luminescence performance of Cs 2 ZrCl 6 nanocrystals has great importance to cater for practical applications. In view of the surface defects frequently formed by the liquid phase method, the particle morphology and surface quality of this material are expected to be regulated if certain intervention is made in the synthesis process. In the work, differing from normal cell lattice modulation based on the ion doping, the grain size and surface morphology of Cs 2 ZrCl 6 nanocrystals are optimized via adding a certain amount of InCl 3 to the synthetic solution. The surface defects are restored to inhibit the defect-induced non-radiative transition, resulting in the improvement of the luminescence properties. Moreover, a flexible Cs 2 ZrCl 6 @polydimethylsiloxane film with excellent heat, water, and bending resistance and a light-emitting diode (LED) device are fabricated, exhibiting excellent application potential for X-ray imaging and blue LED.
研究领域:
材料科学
·
光学工程
·
医学影像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiale Zhang,Chengyue Xin,Ming Ma,Wenjun Zhang,Zihan Chen,Ying Gao,Dan Wang
Conventional materials with single emission centers face limitations in emission tunability and anti-counterfeiting security. Thermochromic-induced reversible luminescence modulation offers an effective approach for multi-level optical encryption. In this work, we demonstrate an information‐encryption strategy based on a vacancy-ordered perovskite that undergoes reversible, delayed luminescence shifts. Blue-emitting Bi 3+ -doped Cs 2 ZrCl 6 crystals were synthesized via a facile precipitation method and exhibit dual emission centers under different excitations. Under 365 nm excitation, the Bi 3+ emission at 465 nm undergoes a thermochromic‐induced red shift to 500 nm upon annealing at 110–180 °C; this visibly distinct green state persists for seven days at room temperature and fully reverts to blue over ≈40 days. In contrast, the intrinsic Cs 2 ZrCl 6 self-trapped-exciton emission at 254 nm excitation remains constant, providing an internal reference for enhanced anti-counterfeiting security. Comprehensive photoluminescence and UV–Vis diffuse-reflectance analyses reveal that annealing modulates the band gap via Bi 3+ -induced intermediate states, thereby driving the reversible emission shift without altering crystal structure or oxidation states. By incorporating the Bi 3+ -doped Cs 2 ZrCl 6 powder into conventional screen-printing ink (5:1 mass ratio), we fabricate nearly invisible security patterns that switch from blue to green under 365 nm UV after heating and automatically recover, enabling multi-cycle thermal encryption. This study not only elucidates the band-gap–mediated mechanism of thermochromic luminescence in lead-free perovskites but also establishes a versatile platform for next-generation, reversible optical security and anti-counterfeiting applications.
研究领域:
材料科学
·
光学物理
·
纳米技术
·
固态化学
·
信息安全
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Dengbang Zhao,Ying Liu,Yanbing Han,Xu Chen,Mochen Jia,Jibin Zhang,Linyuan Lian,Di Wu,Xinjian Li,Zhifeng Shi
Design of stable white-light emitting materials based on the emerging lead-free metal halide colloidal nanocrystals is in urgent demand for lighting technology innovation. Herein, we developed a facile hot-injection method and optimize the synthesis conditions to prepare Sb 3+ doped Cs 2 ZrCl 6 nanocrystals with good uniformity and crystallinity. Sb 3+ ions were doped into the Cs 2 ZrCl 6 lattice and proved to occupy the sites of Zr 4+ ions, generating additional absorption bands at lower energy and new emission band centered at 620 nm apart from the absorption and emission from the host. The emission at 620 nm from Sb 3+ ions could be prompted by an energy transfer process between the host STEs and Sb 3+ ions. Moreover, benefiting from two broad emission bands from singlet and triplet states of Sb 3+ ions in Cs 2 ZrCl 6 nanocrystals, we obtained tunable white-light-emitting nanocrystals by adjusting the dopant concentration. Our study provides a reliable method to design efficient single-emitter-based white-light emitting metal halide nanocrystals and promote their development in the field of lighting and displays.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
照明技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Chaojun Yang,Xiangdan Tian,Guangguang Huang,Xinyang Xiong,Kaiwei Sun,Bo Zhang,Shujie Wang,Zuliang Du
Cesium zirconium halide (e.g., Cs2ZrCl6:Te or CZCT) perovskites have garnered significant interest due to their unique optical properties. However, there have been no reports of CZCT perovskite nanoparticles (PNPs) that simultaneously offer high efficiency and thermal stability. Here, a comprehensive defect suppression strategy is reported to achieve CZCT PNPs with these attributes. First, the inner defects of CZCT perovskite microcrystals (PMCs) are minimized by controlling crystallization kinetics precisely. Second, the PNPs are obtained from PMCs via top-down fabrication, and the surface defects of PNPs are passivated via the hydroxyl groups of alkyl-terminated silica-oligomer shell (ASO). The resulting CZCT@ASO PNPs show the highest photoluminescence quantum yield (PLQY) of 96% and high thermal stability among the reported conventional CZCT emitters. Finally, white light-emitting diodes (WLEDs) are integrated by using CZCT@ASO PNPs as the down-color converters, achieving a color coordinate of (0.31, 0.33) and a color rendering index of 86. These results demonstrate that core/shell CZCT@ASO PNPs have great potential as phosphors for lighting applications.
研究领域:
材料科学
·
光电
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 30
·17417-17424
·
IF 4.6
Chen Xiangxiang,Zhang Tong,Sun Wenda,Li Yue,Wang Yiwei,Wang Junhan,Yang Huanxin,Zhang Libing,Yue Zhao,Li Xiyan
The integration of mechanoluminescence (ML) and thermochromic
behavior
into a single material holds significant promise for applications
in flexible electronics, multidimensional sensing, and interactive
devices. Inorganic halide perovskites, owing to their intrinsic structural
flexibility and tunable bandgap, are excellent candidates for multifunctional
materials. However, research into these combined functionalities has
remained notably limited to date. To bridge this gap and explore the
potential of such material systems for intelligent sensing applications,
this study develops a lead-free Cs 2 ZrCl 6 : Sb 3+ perovskite that exhibits dynamically tunable ML color and
thermally activated emission switching. Through strategic doping,
we combined the intrinsic blue ML of the host with incorporated red-emitting
centers, enabling colorimetric pressure sensing. The material achieved
a remarkable maximum relative sensitivity ( S r ) of 1% K –1 at 300 K. Furthermore, we integrated
it into a novel photoelectric system as a proof of concept that simultaneously
characterized optical intensity and chromaticity. This work not only
elucidates the luminescence mechanisms in lead-free perovskites but
also establishes a new paradigm for developing intelligent, self-diagnostic
ML sensors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 43
·2204801
·
IF 32.086
Fei Zhang,Yingchun Zhou,Zhipeng Chen,Meng Wang,Zhuangzhuang Ma,Xu Chen,Mochen Jia,Di Wu,Jiawen Xiao,Xinjian Li,Yu Zhang,Zhifeng Shi,Chongxin Shan
Flexible scintillator screens with environmental stability, high sensitivity, and low cost have emerged as candidates for X-ray imaging applications. Here, a large-scale and cost-efficient solution synthesis of the vacancy-ordered double perovskite Cs 2 ZrCl 6 , which is characterized by thermal activation delayed fluorescence (TADF) dominated by triplet emission under X-ray irradiation, is demonstrated. The large Stokes shift and efficient luminescence collection of TADF effectively ensure the light outcoupling efficiency. Further, flexible X-ray scintillator screens with an area of 400 cm 2 are prepared using poly(dimethylsiloxane) (PDMS) as the carrier, exhibiting excellent scintillation properties with light yields as high as 49 400 photons MeV −1 , spatial resolutions up to 18 lp mm −1 and detection limits as low as 65 nGy s −1 . Finally, the high-quality imaging results of non-planar and dynamic objects by such screens are demonstrated. It is believed that the explored Cs 2 ZrCl 6 @PDMS flexible scintillator screens would offer a big step toward expanding the application range of scintillators in different environments.
研究领域:
材料科学
·
医学成像
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）