Chemistry-An Asian Journal
·
2024
·Vol. 19
·期 24
·e202400798
·
IF 3.5
Haiyun Zhou,Pingping Li,Tingting Zhong,Yunzhen Teng,Siqi Li,Xiaofeng Luo,Xinning Wang,Min Yang,Guowei Deng
Mn doping has been used to improve the physical chemistry of lead halide perovskite nanocrystals such as CsPbX 3 , where X is a halogen ion. In this paper, a two-phase method for Mn-doped CsPbX 3 nanosheets (where X=Br, Cl), namely water-hexane system, is reported. Compared to conventional catalyst arrays, the band gap of CsPbBr 3 nanocrystalline is easily tuned, the carrier diffusion distance is remote, the band edge position of the band structure is favorable for a wide range of electrocatalytic redox reactions, and the catalytic active site is maximally exposed, providing a larger electrolyte contact area. The porous hierarchical structure also accelerates the release of hydrogen bubbles. The results showed that the optimized Mn : CsPbBr 3 catalyst exhibited excellent electrolytic performance of aquatic hydrogen in alkaline electrolyte (1 mol/L KOH). The overpotentials of the oxygen evolution reaction (OER) at the current densities of 10 and 100 mA cm −2 are only 114.4 and 505.4 mV, respectively, with a Tafel slope of 43 mV dec −1 . At a current density of 10 mA cm −2 , the excess potential required for the hydrogen evolution reaction (HER) is 158.6 mV and it exhibits excellent electrochemical stability. The Mn : CsPbBr 3 nanocrystalline consists of two electrodes for hydrolysis of water, requiring only a voltage of 1.45 V. This provides implications for the optimization of electrocatalysts in alkaline electrolytes with the aim of developing next generation 2D electrocatalysts for overall water splitting.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Shi Ye,Jia-Yi Sun,Yu-Hong Han,Ya-Yun Zhou,Qin-Yuan Zhang
CsPbX3 (X = Cl, Br, I) perovskite quantum dots (QDs) have emerged as competitive candidate luminescent materials in the photoelectric fields due to their superior luminescence properties. However, the major drawback such as poor resistance to temperature, moisture, and irradiation of light, especially for the red QDs with I–, hinders their practical applications. Herein, we synthesized Mn2+-doped CsPbCl3 embedded in the cage of zeolite-Y as a new orange-red phosphor for the white light-emitting diode (WLED). The composites have significantly improved resistance to both elevated temperature and water over the bare Mn2+-doped QDs. The former exhibits little degradation whereas the latter shows apparent decline upon the irradiation of lights in the orange LED devices, which are fabricated by employing each material as a color-conversion phosphor coated on a 365 nm UV chip. A WLED is also achieved with a 365 nm UV chip coated with a CsPb(Cl0.5,Br0.5)3–Y blue phosphor and a CsPb0.75Mn0.25Cl3–Y orange phosphor. The device possesses a Commission Internationale de l’Éclairage coordinate of (0.34, 0.36), a correlated color temperature of 5336 K and a color rendering index of 81.
研究领域:
材料科学
·
光电领域
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 25
·7905-7909
·
IF 7.393
Heng Yang,Huihui Li,Rui Yuan,Junfeng Chen,Jingtai Zhao,Sheng Wang,Yufeng Liu,Qianli Li,Zhijun Zhang
Traditional inorganic scintillation crystals have a high stopping power to high-energy particles or rays; however, their wide applications are limited due to the fixed emission band. CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (CsPbX3 NCs) have been proved to achieve full-color emission and effective X-ray detection, but failed to detect γ-rays effectively due to their weak absorption ability. Therefore, based on the advantages of the tunable spectra for CsPbX3 NCs and the high stopping ability of a BaF2 single crystal, a novel CsPbX3 NCs@BaF2 scintillation screen is developed ingeniously for realizing fast and full-color emission under high-energy ray excitation. The CsPbX3 NCs@BaF2 scintillation screen exhibits a tunable emission ranging from 435 to 648 nm under hard X-ray excitation. It is of note that the light yield of the CsPbBr3 NCs@BaF2 scintillation screen can reach up to 6300 photons per MeV and it shows a fast decay time component (∼11 ns) under γ-ray excitation. The purpose of this contribution is to provide a new solution for guiding the perovskite materials as potential scintillators for fast and full-color emission expanding the application of high-energy radiation detection.
研究领域:
材料科学
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物理学
·
辐射检测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Lin Yuan,Yufeng Zhou,Ze Wang,Enrou Mei,Xiaojuan Liang,Weidong Xiang
Colloidal lead halide perovskite nanocrystals (NCs) have recently emerged as versatile photonic sources. However, their performance stability has been far from the requirements, and this type of material is toxic to the environment after degradation. In this paper, a hot injection strategy was used to prepare a CsPbX 3 perovskite NC solution, wherein the photoluminescence quantum yield (PLQY) of CsPbBrI 2 reached 78% and that of CsPbBr 3 was 63%. Then, CsPbX 3 NCs are successfully adsorbed on natural layered mineral pyrophyllite for improving heat, light, and water stability. Monodispersed CsPbX 3 NCs are evenly distributed on the surface of the pyrophyllite sheet in a high-density manner, which possibly originates from the electrostatic attraction effect of abundant anions on the surface of pyrophyllite to CsPbX 3 NCs. In a series of CsPbX 3 @pyrophyllite nanocomposites prepared, the PLQYs of green-emitting CsPbBr 3 and red-emitting CsPbBrI 2 were 47% and 29%, respectively. The materials were employed to fabricate white light-emitting diodes (WLEDs) with a wide color gamut of 117%. Importantly, because of the swelling and cation-adsorbent properties of pyrophyllite, the dissolution of lead in water was greatly reduced, which plays a certain role in ecological protection.
研究领域:
材料科学
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环境科学
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光学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiaobo Hu,Yanqiao Xu,Jiancheng Wang,Jiaxin Ma,Lianjun Wang,Wan Jiang
CsPbX 3 (X = Cl, Br, I) perovskite nanocrystals (NCs) are emerging as promising candidates for fluorescence sensors due to their superior optoelectronic properties. However, the poor stability restricts their practical applications in aqueous fluorescent detection. Herein, we report in-situ encapsulation of CsPbX 3 NCs into uniform PVDF-HFP/PS polymer nanofibers with fine diameter of only 49.9 ± 2.2 nm by one-step electrospinning process. The as-fabricated CsPbX 3 @PVDF-HFP/PS nanofibers exhibit high photoluminescence quantum yield (PLQY) of 90%, tunable emission wavelength covering the whole visible range of 451.5–650.8 nm. Most importantly, the water stability of nanofiber membranes can be significantly improved by introducing the 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PFDTMS) as hydrophobic additives, in which their PL intensity can retain 88% initial value after water immersion for up to 100 days. The universality of this fabrication strategy for the stable nanofibers is demonstrated by utilizing different types of polymers and perfluorosilanes (PFSs). Taking advantage of excellent optical properties, fine diameter and high hydrophobicity of PFDTMS-modified CsPbBr 3 @PVDF-HFP/PS nanofibers, the detection for rhodamine 6G (R6G) and rhodamine B (RhB) in aqueous solution with maximum fluorescence resonance energy transfer (FRET) efficiency up to 80.9% and 69.7% are realized, respectively. Notably, these electrospun nanofiber membranes possess outstanding durability and recyclability, indicating their great potential in multifunctional photoelectric applications.
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
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 21
·2300493
·
IF 19
Shuo Song,Yuchen Lv,Bingqiang Cao,Wenzhi Wang
The poor stability of CsPbX 3 (X = Cl, Br, I) perovskite quantum dots (PQDs) in polar solvents such as water, seriously hinders their practical application. Herein, 5-Bromovaleric acid (BVA) is used to replace oleic acid (OA), the most common surface ligand in CsPbX 3 PQDs synthesis. Under the synergic action of oleylamine (OLA), CsPbX 3 PQDs with high water stability can be synthesized directly in water. Because the carboxyl ligands provided by BVA, and the long chain amines provided by OLA formed hydrophobic shells on the surface of CsPbBr 3 PQDs, the obtained CsPbBr 3 PQDs still has high luminescence intensity and photoluminescence quantum yield after being dispersed in water for several days, and the luminescence peak is always maintained at 518 nm. In contrast, the luminescence intensity of CsPbBr 3 PQDs synthesized with OA and OLA is <1% of the initial intensity after only 30 min. CsPbCl 3 and CsPbI 3 PQDs synthesized directly in water by this method also show high water stability. In this study, for the first time the synthesis method of CsPbX 3 PQDs with high water stability using BVA/OLA as surface ligands is proposed, which provides an effective way to explore the synthesis of PQDs that can maintain stability in water.
研究领域:
纳米材料
·
钙钛矿量子点
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表面化学
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光电子学
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发光材料
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2020
·Vol. 10
·期 22
·2000691
·
IF 25.245
Chenyang Duan,Jian Cui,Miaomiao Zhang,Yu Han,Shaomin Yang,Huan Zhao,Hongtao Bian,Jianxi Yao,Kui Zhao,Zhike Liu,Shengzhong (Frank) Liu
High temperature stable inorganic CsPbX 3 (X: I, Br, or mixed halides) perovskites with their bandgap tailored by tuning the halide composition offer promising opportunities in the design of ideal top cells for high-efficiency tandem solar cells. Unfortunately, the current high-efficiency CsPbX 3 perovskite solar cells (PSCs) are prepared in vacuum, a moisture-free glovebox or other low-humidity conditions due to their poor moisture stability. Herein, a new precursor system (HCOOCs, HPbI 3 , and HPbBr 3 ) is developed to replace the traditional precursors (CsI, PbI 2 , and PbBr 2 ) commonly used for solar cells of this type. Both the experiments and calculations reveal that a new complex (HCOOH•Cs + ) is generated in this precursor system. The new complex is not only stable against aging in humid air ambient at 91% relative humidity, but also effectively slows the perovskite crystallization, making it possible to eliminate the popular antisolvent used in the perovskite CsPbI 2 Br film deposition. The CsPbI 2 Br PSCs based on the new precursor system achieve a champion efficiency of 16.14%, the highest for inorganic PSCs prepared in ambient air conditions. Meanwhile, high air stability is demonstrated for an unencapsulated CsPbI 2 Br PSC with 92% of the original efficiency remaining after more than 800 h aging in ambient air.
研究领域:
材料科学
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太阳能
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 22
·10505-10513
·
IF 7.233
Xu Chen,Dongyu Li,Gencai Pan,Donglei Zhou,Wen Xu,Jinyang Zhu,He Wang,Cong Chen,Hongwei Song
CsPbX3 (X = Cl, Br or I) perovskite quantum dots (PQDs) have attracted tremendous attention due to their extraordinarily excellent optical properties. However, there is still an obstacle for their bio-application, which is limited by their water-instability. In this work, we have designed a novel visible light triggered photoelectrochemical (PEC) sensor for dopamine (DA) based on CsPbBr1.5I1.5 PQD immobilized three-dimensional (3D) TiO2 inverse opal photonic crystals (IOPCs). Supported by the TiO2 IOPCs, the water-stability of the PQDs as well as that of the PEC sensor was considerably improved. Furthermore, employed as a photoactive material in PEC sensor, CsPbBr1.5I1.5 PQDs can expand the photocurrent response of the PEC sensor to the whole visible region. In addition, the modulation of the photonic stop band effect of TiO2 IOPCs on the incident light and the emission of PQDs could further enhance the photocurrent response. Such a PEC sensor demonstrates sensitive detection of DA in phosphate buffer saline solution and serum, with a good linear range from 0.1 μM to 250 μM and a low detection limit of approximately 0.012 μM. Our strategy opens an alternative horizon for PQD based PEC sensing, which could be more sensitive, convenient and inexpensive for clinical and biological analysis.
研究领域:
材料科学
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光化学
·
分析化学
·
生物传感器
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Zhang Wen,Zheng Wei,Huang Ping,Yang Dengfeng,Shao Zhiqing,Zhang Wei,Zhang Hao,Xie Zhi,Xu Jin,Chen Xueyuan
Yb 3+ /Er 3+ activated upconversion (UC) materials have been widely applied in many advanced technologies owing to their high UC efficiency in the visible region. However, it is challenging to achieve efficient ultraviolet (UV) UC luminescence (UCL) in Yb 3+ /Er 3+ system, due to the dense energy levels of Er 3+ that impose deleterious nonradiative relaxation. Herein, we report a strategy to liberate the UV-UCL of Er 3+ based on the confined energy transfer in Yb 3+ /Er 3+ co-doped 0D Rb 3 InCl 6 with a low phonon energy and a large interionic distance. This facilitates the population of Er 3+ at the 4 G 11/2 state, which yields intense upconverted UV emission at 384 nm, with a much higher UV-to-green ratio ( I 384 / I 554 = 0.864) than that of traditional UC materials ( < 0.1). By leveraging the intense upconverted UV emission of Er 3+ , we demonstrate the application of Rb 3 InCl 6 :Yb 3+ /Er 3+ nanocrystals as a NIR-to-UV transducer for NIR-triggered anion exchange of CsPbX 3 perovskite nanocrystals with high efficiency and good controllability. These findings offer an approach for the exploration of novel UC materials via energy transfer and crystal lattice engineering towards versatile applications.
研究领域:
材料科学
·
光学材料
·
光子学
·
纳米技术
·
固体物理
·
稀土材料
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能量传递
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Meng Cai,Wei Liu,Tiankai Zhang,Pengfei Yan,Yuxuan Li,Weiqian Kong,Hangjuan Wu,Zongwei Chen,Zhenkun Gu,Lin Dong,Qun Xu,Yanlin Song,Junjie Ma,Chongxin Shan,Feng Gao
All-inorganic CsPbX 3 (X = I, Br, Cl) perovskites emerged as a crucial material for addressing the stability bottleneck due to their exceptional resistance to both light-thermal stress. However, their performance is limited by adverse optoelectronic dissipation arising from inadequate photon conversion and chaotic carrier energetics. Herein, the mechanism of the unique nonlinear plasmonic effect in van der Waals 2D MoO 3-x is elucidated, which is mediated by electronic intermediate states. It demonstrates that the 2D MoO 3-x serves as a light-capture-antenna in heterodimensional CsPbX 3 -MoO 3-x optically coupled system, contributing to the accumulation the optical field energy on the nanoscale and resulting in a remarkable 59% increase in photon convergence. Additionally, facet-oriented carrier channels can be established through heteroepitaxy along matched Mo-O octahedron. This optoelectrical-bimodal-coupling engineering combined with a bifacial light-harvesting configuration yields a bifacial equivalent efficiency of 27.33%, which stands as the supreme performance in all-inorganic perovskite photovoltaics. Graphical This remarkable work combines supercritical CO 2 chemical engineering, two-dimension plasmon photophysical science, and perovskite photovoltaic technology. It introduces novel concepts like broad - spectrum coupled photon absorption, the intermediate - localized - states model, and optoelectrical - bimodal - coupling engineering. It aims to combat optoelectronic dissipation and enhance energy harvesting via a heterodimensional van der Waals optically coupled system.
研究领域:
光伏技术
·
等离激元学
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纳米光子学
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材料科学
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光电子学
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钙钛矿太阳能电池
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固体物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Jinxing He,Lu Yu,Yandu Jiang,Lei Lü,Zhonghui Han,Xiaolei Zhao,Zhixiang Xu
All-inorganic cesium lead halides (CsPbX 3 , X = Cl, Br, I) perovskite quantum dots (PQDs) have attracted extensive research attention due to their unique optical properties. However, their instability and sensitivity to air and moisture hinder further use in fluorescent sensing applications. In this work, the construction and application of PQDs encoded molecularly imprinted polymers (MIPs-CsPbX 3 ) for Sudan I detection were proposed. After being encoded the PQDs, the obtained MIPs-CsPbX 3 microspheres exhibited high stability for the external environment, remarkable bright fluorescence, and specific recognition for Sudan I. The fluorescent intensity of the MIPs-CsPbX 3 microspheres was obviously quenched upon loading Sudan I, and good linear responses in the range of 0.5–150 µg L −1 , limit of detection of 0.3 µg L −1 , and good recoveries of 95.27 % to 105.96 % in spiked samples were obtained. The developed fluorescent probe provided a selective and sensitive quantified method for Sudan I detection in food matrices.
研究领域:
材料科学
·
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2021
·Vol. 17
·期 46
·2103255
·
IF 13.281
Menglu Li,Yujing Zeng,Xinyu Qu,Mohammed Jalalah,Saeed A. Alsareii,Chao Li,Farid A. Harraz,Genxi Li
CsPbX 3 perovskite nanocrystals (NCs), with excellent optical properties, have drawn considerable attention in recent years. However, they also suffer from inherent vulnerability and hydrolysis, causing the new understanding or new applications to be difficultly explored. Herein, for the first time, it is discovered that the phospholipid membrane (PM)-coated CsPbX 3 NCs have intrinsic biocatalytic activity. Different from other peroxidase-like nanozymes relying on extra chromogenic reagents, the PM-CsPbX 3 NCs can be used as a self-reporting nanoprobe, allowing an “add-to-answer” detection model. Notably, the fluorescence of PM-CsPbX 3 NCs can be rapidly quenched by adding H 2 O 2 and then be restored by removing excess H 2 O 2 . Initiated from this unexpected observation, the PM-CsPbX 3 NCs can be explored to prepare multi-color bioinks and metabolite-responsive paper analytical devices, demonstrating the great potential of CsPbX 3 NCs in bioanalysis. This is the first report on the discovery of nanozyme-like property of all-inorganic CsPbX 3 perovskite NCs, which adds another piece to the nanozyme puzzle and opens new avenues for in vitro disease diagnostics.
研究领域:
纳米技术
·
生物化学
·
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
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