OPTICAL ENGINEERING
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2023
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IF 1.3
Jie Zheng,Xian Wu,Wenkai Zhang,Jiahao Cheng,Ke Liu,Guijie Liang,Xin Zhang,Jingyang Wang,Yating Zhang,Qingsong Hu
In recent years, lead-free metal halide luminescent materials have attracted extensive attention because of their excellent properties including but not limited to good environmental compatibility, ultrawide emission band, and high photoluminescence quantum yield. They are considered to have great application potential in the photoelectric field. We modified the previously reported synthesis and prepared pure phase Cs2SnCl6 : Bi3 + , Te4 + using simple solution method. Then the emitter was further coated with polysiloxane to form polysiloxane luminescent ceramic (PSOLC). The prepared PSOLCs have almost the same luminescence as the powders, and their color coordinates and color temperature can be tuned freely by adjusting the ratio of blue and yellow emission, which both encourage outdoor-lighting application. Additionally, they are demonstrated to support flexible luminescence and show highly improved machinability. To test their performance in practical application, we apply the PSOLCs to safety identification board and finally get a satisfactory result, directly indicating that the PSOLCs prepared from lead-free perovskite are quite suitable for flexible-lighting-related display applications.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
Materials
·
2019
·Vol. 12
·期 9
·1501
·
IF 2.972
Hongdan Zhang,Ludan Zhu,Jun Cheng,Long Chen,Chuanqi Liu,Shuanglong Yuan
In recent years, all-inorganic lead-halide perovskites have received extensive attention due to their many advantages, but their poor stability and high toxicity are two major problems. In this paper, a low toxicity and stable Cs2SnCl6double perovskite crystals were prepared by aqueous phase precipitation method using SnCl2as precursor. By the XRD, ICP-AES, XPS, photoluminescence and absorption spectra, the fluorescence decay curve, the structure and photoluminescence characteristics of Ce3+-doped and undoped samples have been investigated in detail. The results show that the photoluminescence originates from defects. [SnSn4+2++VCl] defect complex in the crystal is formed by Sn2+substituting Sn4+. The number of defects formed by Sn2+in the crystal decreases with Ce3+content increases. Within a certain number of defects, the crystal luminescence is enhanced with the number of [SnSn4+2++VCl] decreased. When Ce3+is incorporated into the crystals, the defects of [Ce3+Sn4++VCl] and [SnSn4+2++VCl] were formed and the crystal show the strongest emission. This provides a route to enhance the photoluminescence of Cs2SnCl6double perovskite crystals.Keywords:lead-free perovskite;Cs2SnCl6;doping;photoluminescence
研究领域:
材料科学
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光电
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固体物理
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DOI
PubMed
高影响因子
Crystals
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2019
·Vol. 9
·期 5
·258
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IF 2.061
Hongdan Zhang,Ludan Zhu,Jun Cheng,Long Chen,Chuanqi Liu,Shuanglong Yuan
The Cs2SnX6perovskites have attracted much attention due to excellent optoelectronic properties and high stability. In the present work, we have focused on the morphology control and photoluminescence characteristics of the Cs2SnCl6perovskite crystals. The synthesis process of the Cs2SnCl6crystals includes two stages composed of the formation of initial crystals and the growth of Cs2SnCl6; the later originated from the oxidization of CsSnCl3. This process has been confirmed by Scanning electron microscope (SEM) and X-rays diffraction (XRD). By controlling the concentration of the initial reactants and hydrochloric acid in the solution to change the supersaturation of the solution, different crystal morphologies, such as truncated octahedron, octahedron, hexapod, quasi-sphere, have been obtained. In relatively a low supersaturation solution, the amount of growth units dominates the crystal growth process to obtain the hexapod and self-assembly crystals. In contrast, in relatively high supersaturation solution, nucleation predominates to yield small size truncated octahedrons and near-spherical Cs2SnCl6crystals. The synthesized Cs2SnCl6crystals have shown a wide emission band peaking at 450 nm with full width at half maximum (FWHM) 63 nm due to the defects introduced by Sn2+. The photoluminescence intensities of crystals synthesized at various conditions exhibited considerable difference, which was about 60 times between the highest and the lowest.Keywords:lead-free perovskite;Cs2SnCl6;crystal growth;photoluminescence
研究领域:
材料科学
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光学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Mengyao Wang,Xiaofei Qing,Tianyun Du,Chuanli Wu,Xiuxun Han
The rising demand of X-ray imaging technologies in medical radiography and nondestructive detection calls for novel scintillator materials particularly with effective cost, high resolution, and low detection limit. Here we reported the investigations on the scintillating behavior of vacancy-ordered double perovskite Cs2SnCl6 fabricated via a simple co-precipitation process. By introducing Te4+ doping, an intense yellow emission was achieved upon X-ray radiation. Combined with PDMS, flexible imaging screens with tunable size and thickness could be obtained, and demonstrated a high resolution of 20 LP mm-1, low detection limit of 132 nGyair/s, and high X-ray radiation endurance. Its excellent flexibility enables clear and less vignetting X-ray imaging for nonplanar subjects. The findings open a new avenue towards versatile applications for Sn-based vacancy-ordered double perovskites other than visible and near-infrared emissions.
研究领域:
材料科学
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医学影像学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Chao-Jie Wang,Chen-Chen Guo,Le-Xi Zhang,Qi-Da Qiu,Quan-Wei Song,Yan-Yan Yin,Li-Jian Bie
Recently, lead-free halide perovskites have made outstanding achievements in gas/humidity sensors, yet their comprehensive performance still needs to be further optimized. Herein, CsCl@Cs 2 SnCl 6 composites with various CsCl contents were synthesized by in-situ pyrolysis of lead-free halide perovskite Cs 2 SnCl 6 micro-octahedra at different temperatures. After structural, morphological and optical characterization, CsCl@Cs 2 SnCl 6 composites were explored as humidity sensing materials for the first time. Compared with pristine and pyrolytic samples, Cs 2 SnCl 6 calcined at 300 °C (CSC-3) exhibited the best humidity sensing performance. The CSC-3 sensor has the characteristics of high response (1.6 × 10 5 ), small hysteresis (1.1 %), fast response speed (14 s) and good stability (30 d), enabling robust real-time touchless physiological humidity monitoring of human respiration and finger perspiration. In addition, the humidity sensing mechanism was discussed by complex impedance analysis, confirming the sensitization effect of CsCl on Cs 2 SnCl 6 perovskites. This study provides efficient CsCl@Cs 2 SnCl 6 composites for human body related humidity detection, moreover, gives new insights into electrolyte-sensitization strategy of lead-free halide perovskites for high-performance sensory devices.
研究领域:
材料科学
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传感技术
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生物医学工程
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DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 10
·1900139
·
IF 7.125
Jun Zhou,Jiajun Luo,Ximing Rong,Peijia Wei,Maxim S. Molokeev,Yang Huang,Jing Zhao,Quanlin Liu,Xiuwen Zhang,Jiang Tang,Zhiguo Xia
Lead-free and stable Sn halide perovskites demonstrate tremendous potential in the field of optoelectronic devices. Here, the structure and optical properties of the “defect” perovskites Cs 2 SnCl 6− x Br x are reported, as well as their use as photodetector materials. Millimeter-sized Cs 2 SnCl 6− x Br x single crystals are grown by the hydrothermal method, with the body color continuously changing from transparent to yellow and finally to dark red. Narrowband single-crystal photodetectors using Cs 2 SnCl 6− x Br x crystals are presented, which show a high detectivity of ≈2.71 × 10 10 Jones, with narrowband photodetection (full-width at half-maximum ≈45 nm) and high ion diffusion barriers. Moreover, the response spectra are continuously tuned from near violet to orange depending on the variation of the bandgap of the single crystals by changing the halide compositions. The strong surface charge recombination of the excess carriers near the crystal surfaces produced by short wavelength light elucidates the narrowband photodetection behavior. This work provides a new paradigm in the design of lead-free, stable, and high-performance perovskite derivatives for optoelectronics applications.
研究领域:
材料科学
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光学工程
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电子器件
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
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IF 5.7
Junnan Wang,Zeyu Wang,Nikolai V. Gaponenko,Jindou Shi,Zheyuan Da,Chen Zhang,Yongqiang Ji,Qing Yao,Youlong Xu,Minqiang Wang
X-ray imaging technology has been integral to numerous aspects of people's lives since its inception. With the growing demand for advanced imaging technologies, lead-free metal halide perovskites have received significant attention due to their non-toxicity, stability, and excellent optical properties. This paper investigates the scintillation behaviour of a Te doped Cs2SnCl6 scintillator composite film (CF) prepared through an innovative in situ growth strategy. This approach achieves the direct growth of Cs2SnCl6:Te micro-crystals within polymethyl methacrylate (PMMA), mitigating the issues of optical property degradation and inhomogeneous distribution that are inevitable in a conventional two-step mixing method. By controllable optimization of the doping ratio of Te, the Cs2SnCl6:Te/PMMA CFs exhibited exceptional scintillation properties under X-ray irradiation, with the detection limit reaching up to 112 nGyairs−1. In X-ray imaging applications, the Cs2SnCl6:Te 15%/PMMA CF demonstrated advanced sensitivity, producing high-resolution structural images of the target object. This advancement highlights the promising potential of lead-free metal halide perovskites in the development and application of X-ray imaging technology.
研究领域:
材料科学
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医学影像
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光学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Hezhen Wu,Huidong Tang,Qing Hu,Yanqiao Xu,Wentao Li,Xiaojun Zhang,Feng Jiang,Guo Feng,LianJun Wang,Wan Jiang
Recently, vacancy-ordered double perovskite phosphors have garnered significant attention due to their high quantum efficiency, elevated carrier mobility, and favorable fluorescence properties. Vacancy ordered double perovskite phosphors has poor fluorescence properties due to the high number of vacancies. The fluorescence characteristics and stability can be enhanced through strategic ion doping. This study synthesized Zr 4+ ion-doped Cs 2 SnCl 6 : 5 %Te using hydrochloric acid-assisted precipitation method. The inclusion of Zr 4+ ions in proper proportions facilitated Jahn-Teller structural distortion in Te 4+ , thereby enhancing the generation of bright yellow-green emission. The photoluminescence quantum yield (PLQY) achieved a peak of 70.9 % at a Zr 4+ ion doping level of 15 %. Furthermore, a water stability test was conducted on the phosphors. At 15 % doping with Zr ions, The Cs 2 Zr 0.15 Sn 0.8 Cl 6 : 5 %Te phosphors demonstrated a remarkable stability, which maintained 100 % of its initial fluorescence intensity after immersion in water for 14 h, proving the excellent stability of the phosphors against water exposure. A white light-emitting diode (WLED) with color coordinates of (0.3486, 0.364), a correlated color temperature of 4915 K, and a color-rendering index (Ra) of 86 was prepared using Cs 2 Zr 0.15 Sn 0.8 Cl 6 : 5 %Te phosphor. This development offers a novel and eco-friendly approach to solid state lighting.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Mingyu Pi,Daofu Wu,Jian Wang,Kai Chen,Jiao He,Jie Yang,Dingke Zhang,Shijian Chen,Xiaosheng Tang
Benefiting from the environmental sensitivity, perovskite materials show great potentials in sensor devices. Especially, humidity sensors are regarded as reversing disadvantage to advantage of the metal halide perovskites. However, the low stability and the toxicity of lead are the major impediment to practical applications for humidity sensors. Herein, in this work, we prepared Cs 2 SnCl 6 perovskites by a solution-phase synthesis method and demonstrated the excellent humidity sensing property of lead-free perovskite Cs 2 SnCl 6 -based sensors. The fabricated humidity sensors exhibit an ultrahigh impedance change of 2.2E6 from relative humidity (RH) of 11–95% and a short response time (0.8 s) and recovery time (5.4 s), which possesses great potentials in real-time moisture detection. Furthermore, it also presents a good capability of reversibility and an impressive stability. The underlying humidity sensing mechanism under different humidity conditions is also discussed in detail. Our results provide a simple, economic and environmental-friendly method for preparing superior-performance and real time humidity sensor.
研究领域:
材料科学
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传感器技术
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环境监测
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纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mengru Geng,Xiaosen Pan,Jiaqi Zhao,Xiaojuan Wang,Ruiming Liu,Zijun Xu,Ning Ma,Meng Gao,Mingzhe Shao,Jie Li
Perovskite is proven to promote the surface dissociation of water molecules that are therefore applied in humidity-responsive electronics. However, inherent defects in crystals severely hinder structural stability and charge transfer which decline the performance of the devices. For this, we design a strategy to introduce Cs 2 SnCl 6 perovskite into the graphene oxide reduction system, during which the growth and optimization of perovskite crystals are achieved, accompanied by the formation of interface coordination with semi-reduced graphene oxide, obtaining stability and durability humidity-sensitive non-contact sensors. The results prove that the sensor exhibits low latency in response (0.8 s) and recovery (1.9 s), excellent sensitivity (6.5 × 10 6 ), and long-term stability (over 240 days). Additionally, distinguishable signals can be output easily in multiple different non-contact sensing applications and gesture recognition applications can be successfully implemented, which provides a possibility of human–computer interaction.
研究领域:
材料科学
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电子工程
·
传感器技术
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产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Qiang Huang,Chengfan Fu,Yangyi Shen,Haowen Wang,Zhengben Wu,Zhiyu Liang,Changqing Tian,Daofu Wu,Fei Qi,Yayun Pu,Nan Zhang,Manjing Wang,Xiaosheng Tang
Although dielectric barrier discharge (DBD) plasma is a promising technique for CO2 conversion, realizing CO2-to-alcohol is still challenging via the use of H2O. Herein, for the first time, efficient CO2 conversion was achieved via the synergism between the Cs2SnCl6 photocatalyst and DBD plasma assisted by H2O. The CO2 conversion ratio of plasma photocatalysis was 6.5% higher than that of only the plasma and photocatalysis, implying that the synergism of plasma catalysis and photocatalysis was achieved. Furthermore, the DBD plasma assisted by the Cs2SnCl6 photocatalyst could convert CO2 and H2O to CO and a small amount of methanol and ethanol. The CO2 conversion ratio was enhanced by 50.6% in the presence of H2O, which was attributed to the improvement of charge transfer due to the increased electrical conductivity of the photocatalyst surface during plasma discharge. This work provides a new idea for developing an efficient system for CO2 utilization.
研究领域:
环境科学
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化学工程
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材料科学
·
等离子体物理
·
催化
✓ 已验证
DOI
高影响因子
Photonics Research
·
2021
·Vol. 9
·期 11
·2182-2189
·
IF 7.08
Shunfa Gong,Ruirui Wu,Sen Yang,Lifang Wu,Minmin Zhang,Qiuju Han,Wenzhi Wu
The toxicity and instability of lead halide perovskite seriously limit its commercial application in lighting, although it has high photoluminescence (PL) efficiency and adjustable emission. Here, lead-free bismuth (Bi) and antimony (Sb) codoped Cs2SnCl6 (BSCSC) microcrystals (MCs) are prepared successfully by a solvothermal method. The PL spectrum is composed of dual emission bands with the peak at 485 and 650 nm, of which relative intensity can be tunable through the change of Bi and Sb feeding contents, respectively. Because of the phonon–electron interaction, the PL intensity is enhanced as the temperature rises within the range of 80–260 K. Then, the nonradiative transition is intensified until 380 K, which results in decrease in PL intensity. Simultaneously, combining with time-resolved PL, it is concluded that the emission peak at 485 nm is attributed to the [BiSn+VCl] as the luminescent centers with the lifetime of hundreds of nanoseconds, and the emission peak at 650 nm is attributed to microsecond-timescale self-trapped excitons. The maximum values of relative sensitivity (SR) and absolute sensitivity (SA) values obtained are 3.82% K−1 and 5.11 ns ·K−1, which for the first time to our knowledge demonstrate that BSCSC MCs can be novel luminescent materials for developing better optical thermometry. White-light-emitting diodes (WLEDs) are constructed using BSCSC MCs only combined with an LED chip, the Commission Internationale de L’Eclairage color coordinates of which are (0.30, 0.37). It provides a novel scheme for the lighting field to realize WLEDs without adding additional commercial phosphors.
研究领域:
材料科学
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光学
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光子学
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纳米技术
✓ 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）