Small
·
2025
·
IF 12.1
Cheng-Xun Guo,Jing-Hua Chen,Zi-Lin He,Jun-Hua Wei,Dai-Bin Kuang
Methylammonium lead bromide perovskite (MAPbBr 3 ) quantum dots (QDs) have emerged as promising candidates for next-generation optoelectronic applications owing to their exceptional photoluminescent properties. However, their practical applications face significant challenges due to inherent instability issues. Herein, a solvent-induced in situ crystallization method is presented to encapsulate MAPbBr 3 QDs within a crosslinked (cl-) polymethyl methacrylate (PMMA) network. This innovative approach eliminates environmental concerns associated with traditional solvent evaporation methods while enabling uniform dispersion and stabilization of perovskite QDs within the crosslinked polymer matrix. The effects of preparation conditions are systematically investigated on the optical performance of the composite materials. Notably, UV irradiation is found to significantly enhance the luminescent performance. The optimized MAPbBr 3 @cl-PMMA exhibits outstanding optoelectronic performance, featuring a narrow emission profile (full width at half maximum: 24.6 nm), high optical transmittance (91%), and an impressive photoluminescence quantum yield of 98.3%. Benefiting from the protective crosslinked polymer matrix, the composite demonstrates exceptional stability. Furthermore, by integrating MAPbBr 3 @cl-PMMA film with commercial K 2 SiF 6 :Mn 4+ (KSF) red phosphor, a liquid crystal display (LCD) backlight device achieving a wide color gamut of 122.7% National Television System Committee (NTSC) 1953 standard is fabricated. This environmentally friendly and scalable synthesis method offers a promising pathway for large-area manufacturing and practical optoelectronic applications.
研究领域:
材料科学
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光学工程
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高分子化学
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纳米技术
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显示技术
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光电子学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Sihui Huang,Ting Zhang,Chunli Jiang,Chunhua Luo,Hechun Lin,Ye Chen,Ruijuan Qi,Wenlei Yu,Hui Peng
Organometal halide perovskite nanocrystals are very promising for optoelectronic applications due to their unique optical properties . However, the OHP nanocrystals generally suffer from problems such as nonuniform morphology and poor stability. This work reports the synthesis of MAPbBr 3 nanoplatelets through dilution of the irregular colloidal MAPbBr 3 nanocrystals prepared at 50 °C. The dilution followed by self-organization of the nanocrystals result in the production of uniform square nanoplatelets with long term stability up to 6 months and high photoluminescence quantum yield about 90%. Furthermore, by using bidentate coordination molecule pyrazole as co-ligand, regular 2D structural Nanocrystals with round edge and aggregation were produced. The aggregated nanoplatelets prepared at 50 °C show the same self-assembly process after dilution to form uniform square nanoplatelets.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yidi Wang,Yang Wang,Ziqi Wang,Liangfeng Luo,Benjamin Tawiah,Chang Liu,Jiachuan Hua,Yang Ming,John H. Xin,Wai-Yeung Wong,Bin Fei
While the metal halide perovskite materials are emerging as potentially promising photocatalysts, they still suffer from the intrinsic instability, seriously hampering their further practical applications. In this study, a perovskite-based composite with a sandwich structure is first established to realize the encapsulation of individual octylamine-capped MAPbBr 3 (OM-PE) quantum dots (QDs), and the Zeolitic Imidazolate Framework-67 (ZIF-67) isolates the individual OM-PE@PbBrOH QDs (2 nm) to preserve their unique optoelectronic properties while preventing degradation from environmental factors. The resulting sandwich composite was proved to be a staggered-gap heterostructure with a p–n junction, in which the PbBrOH layer acted as a water-resisting covering and ZIF-67 layer promoted the electron mobility. Benefiting from the chemical interactions and interfacial charge dynamics among the different layers, the OM-PE@PbBrOH ⊂ ZIF-67 composite exhibited the superior stability in water for two months, and presented an enhanced photodegradation efficiency of organic dyes (malachite green, methylene blue and rhodamine B), which is around 24 times higher than that of pristine perovskite. By integrating the respective merits of each component, this work unprecedentedly constructs the 2 nm sandwich-like OM-PE@PbBrOH ⊂ ZIF-67 composite, and opens new avenues for stable, efficient, and multifunctional photocatalytic systems, with potential applications beyond wastewater treatment.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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无机化学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Nan Li,Shuaishuai Yu,Yuliang Yi,Haipeng Di,Yehao Deng,Jingjing Zhao
Perovskite single crystals have been found to exhibit excellent X-ray detection and imaging performance. High-purity raw materials have generally been considered a prerequisite to guarantee crystal quality and device performance, which may lead to higher costs. However, we found that higher quality MAPbBr3 single crystals can be obtained from low-purity lead bromide (PbBr2). This is attributed to the presence of impurity lead carbonate (PbCO3) in the raw material. PbCO3 facilitates the suppression of crystal defects, leading to higher quality crystals. With the addition of a small amount of PbCO3 to high-purity PbBr2 raw material, MAPbBr3 single crystals grow with a smoother surface, improved uniformity, and lower defect concentrations. The single crystal becomes more intrinsic. The product of carrier mobility and lifetime increases to 1.3 × 10–2 cm2 V–1. With the addition of PbCO3, the detector sensitivity is about twice as high and the lowest detection limit is approximately 300 times lower, down to 20 nGyair/s. This work reveals the key factors for preparing high-quality perovskite single crystals using low-cost, low-purity raw materials, providing a new approach for producing high-yield perovskite single crystals.
研究领域:
材料科学
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半导体物理
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晶体生长
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辐射探测
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功能材料
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光电子学
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缺陷工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Youchao Kong,Pinsen Zhang,Donghua Fan,Xiaoshuang Li,Shanshan Yan
Assembling perovskites into heterojunctions enables multifunctional high-performance photodetectors. Compared with vertical heterojunctions, lateral heterojunctions enhance the optoelectronic performance of devices due to the direct contact between the photosensitive layer and light, reducing light reflection losses. However, the fabrication of all-perovskite lateral heterojunctions is challenging through a solution method. The first perovskites formed are easily dissolved by the solvent of the second precursor, hindering their further application in photodetectors. In this study, we have developed a preparation process for the lateral microwire (MW)/film heterojunction and the Ag/RbCu2I3 MW/MAPbBr3 film/indium tin oxide heterojunction photodetector by utilizing an optical fiber-based physical transfer step. Thanks to the high-quality RbCu2I3 MW/MAPbBr3 film lateral heterojunction, the device demonstrated excellent optoelectronic performance at 0 V bias voltage, with a responsivity of 0.79 mA·W–1 and a detectivity of 5.34 × 1012 Jones under 339 nm radiation. In addition, the device exhibited consistent and rapid response times under 355 and 450 nm irradiation. This optical fiber-based physical transfer method provides a self-powered light detection strategy for the preparation of all-perovskite lateral heterojunctions.
研究领域:
材料科学
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光子学
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纳米技术
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半导体器件
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yishan Li,Xiaohong Tan,Shaoru Wu,Wenping Hong,Jiamin Luo,Shanshan Zhao,Libo Sun,Jinming Lin,Qiang Chen,Maosheng Zhang
Organic-inorganic halide perovskite nanocrystals (PNCs) have been extensively utilized in the field of sensing, attributed to their superior optoelectronic properties, including high photoluminescence quantum yield, tunable band gap, and narrow full width at half maximum. However, the majority of sensors based on PNCs have traditionally relied on a single fluorescence signal emission and its intensity variations, leading to limitations in visualization resolutions. Hence, we developed a rapid, sensitive, and visually discernible dual-emission ratiometric fluorescence sensor for the detection of methylamine (MA) gas that based on the in situ formation of methylamine lead bromide (MAPbBr 3 ) PNCs within europium metal-organic frameworks (Eu-MOFs) in the ambient atmosphere. In this strategy, Eu-MOFs not only served as the protective matrices to enhance the stability of MAPbBr 3 PNCs but also as luminescent materials in ratiometric fluorescence sensing, owing to their exceptional luminescent properties. More importantly, benefiting from the excellent gas adsorption properties and protective abilities of MOFs, the proposed sensor demonstrates higher sensitivity, stability, and reproducibility. Experimental results indicated a good linear correlation with MA concentrations ranging from 9.0 to 90.0 ppm, achieving a limit of detection as low as 1.0 ppm. In comparison to other reported methodologies, this approach demonstrates a remarkably short response time of 20 seconds.
研究领域:
材料科学
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分析化学
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光电领域
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Hui Fu,Kai Wang,Hao Wu,Chris R. Bowen,Zhi Fang,Zebin Yan,Shuheng Jiang,Deliu Ou,Yang Yang,Jinju Zheng,Weiyou Yang
Currently, the intrinsic instability of organic–inorganic hybrid perovskite nanocrystals (PNCs) at high temperature and high humidity still stands as a big barrier to hinder their potential applications in optoelectronic devices. Herein, we report the controllable in-situ-grown PNCs in polyvinylidene fluoride (PVDF) polymer with profoundly enhanced hygrothermal stability. It is found that the introduced tetradecylphosphonic acid (TDPA) ligand enables significantly improved binding to the surface of PNCs via a strong covalently coordinated P–O–Pb bond, as evidenced by density functional theory calculations and X-ray photoelectron spectroscopy analyses. Accordingly, such enhanced binding could not only make efficient passivation of the surface defects of PNCs but also enable the remarkably suppressed desorption of the ligand from the PNCs under high-temperature environments. Consequently, the photoluminescence quantum yield (PL QY) of the as-fabricated MAPbBr3–PNCs@PVDF film exhibits almost no decay after exposure to air at 333 K over 1800 h. Once the temperatures are increased from 293 to 353 K, their PL intensity can be kept as 88.6% of the initial value, much higher than that without the TDPA ligand (i.e., 42.4%). Moreover, their PL QY can be maintained above 50% over 1560 h (65 days) under harsh working conditions of 333 K and 90% humidity. As a proof of concept, the as-assembled white light-emitting diodes display a large color gamut of 125% National Television System Committee standard, suggesting their promising applications in backlight devices.
研究领域:
材料科学
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纳米技术
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光电技术
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Guobin Huang,Yanmei Zhou,Feiming Li,Xiaohong Tan,Zhixiong Cai,Dengfeng Luo,Tianju Chen,Maosheng Zhang
The development of fluorescent sensor based on lead-based perovskite nanomaterials is of the most intriguing for the design of quick check with low concentration. In the present work, a rapid, stable, and sensitive fluorescent sensor for selective detection of methylamine (MA) gas is firstly constructed based on in-situ formation of MAPbBr 3 (methylamine lead bromide, that is CH 3 NH 3 PbBr 3 ) perovskite nanocrystals (PNCs) in electrospun fibers by reacting MA gas with DMAPbBr 3 @PVDF (dimethylammonium lead [email protected] (vinylidene fluoride), that is (CH 3 ) 2 NH 2 PbBr 3 @PVDF) fibers. In this strategy, not only is the stability of PNCs significantly enhanced, but also does it retain the sensing efficiency due to the excellent permeability of the membrane. The sensor can maintain its stability after storage for two months due to its superior resistance to moisture, which is highly important for real-world applications. Finally, the nanofibers show a dual-mode sensor response to 5–200 ppm MA gas with a limit of detection (LOD) of 0.8 ppm.
研究领域:
材料科学
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化学传感器
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纳米技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
Chengwei Wang,Rui Wang,Yanan Liao,Kai Liu,Qingyi Zhang,Lei Wang,Dawei Gu,Feifei Qin,Feng Chen
PbX(OH) (X=Cl, Br, I) is considered one of the effective encapsulation matrixes to improve the stability and luminescence efficiency of perovskite. Several strategies have been explored to construct perovskite@PbBr(OH) composites with high photoluminescence quantum yield. However, there is limited research on their precise growth kinetics mechanism and morphology control. Here, PbBr2 microwires (MWs) were applied to act as the lead source and serve as a skeleton frame for the growth of CH3NH3PbBr3 (MAPbBr3) MWs. The structures transition from MAPbBr3 to MAPbBr3@PbBr(OH) MWs were triggered by the synergistic effect of H2O and CH3NH3OOCCH3 (methylamine acetate, MAAc). All components and synthesis processes used in this system are explicit which allows a more in-depth exploration of the MAPbBr3@PbBr(OH) formation kinetics. The results indicate that the hydrolysis of MAAc provides OH- and partly replaces Br- ions in MAPbBr3 to form MAPbBrxAc3-x intermediate, which induces the transformation of MAPbBr3 into PbBr(OH) and until the stable MAPbBr3@PbBr(OH) microwires are formed. Based on this growth kinetics process, utilizing H2O-MAAc and extra sodium halide (NaCl, NaI) mixture can synthesize MAPbBrnX3-n@PbX(OH) (X=Cl, I) microwires successfully. Our study can open a new avenue for developing high-efficiency and high-stability fluorescent hybrid perovskites for three primary color detectors, lasing cavities, and sensors.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2026
·Vol. 16
·期 6
·361
·
IF 2.9
Jinting Wang,Panye Zhang,Yidong Zhang,Zeming Wang,Yuan Fang,Oleksandr Ivasenko
Patterned lead-halide perovskite microstructures are promising for integrated optoelectronics, photonics, and polarization-sensitive devices, but the practical growth behavior of compositionally tunable microcrystals under simple static confinement remains insufficiently understood. Here, we investigate template-assisted confined crystallization of MAPbBr3and MAPbBr3−xClxmicrostructures using patterned polydimethylsiloxane (PDMS) stamps. MAPbBr3was first examined as a reference system to evaluate pattern transfer, morphology, substrate compatibility, and characteristic growth imperfections. Periodic microstructures with template spacings from 0.8 to 10 μm were obtained on Si/SiO2, ITO, PDMS, and MAPbBr3macrocrystal substrates. Static stamping creates strong edge–center morphological divergence: thick patterned microcrystals and coalesced domains formed preferentially near the sample edges, whereas thinner isolated microcrystal arrays were more common in central regions. XRD, AFM, SEM, SAED, EDX, HRTEM, PL microscopy, and TRPL analyses show that the method can generate well-crystallized and optically active perovskite domains while also producing multidomain aggregates, incomplete pattern transfer, pressure-induced wrinkling, and nanoscale secondary crystallites. Extension to MAPbBr3−xClxdemonstrates that patterned mixed-halide microstructures can be obtained with composition-dependent structural and optical properties. Nevertheless, XRD, EDX, PL, and TRPL results indicate that Cl-rich samples are not fully described by a simple homogeneous solid-solution model, likely involving compositionally heterogeneous crystallization and a Br-rich emissive component. Preliminary MAPbCl3-on-MAPbBr3experiments further show that PDMS-confined patterning can be coupled with substrate-mediated halide exchange or interfacial recrystallization. Overall, static PDMS-confined crystallization is established as a simple exploratory platform for producing diverse patterned perovskite microstructures. This approach is well-suited for the manual selection of suitable crystals and the fabrication of individual microdevices; however, improved control over pressure, mass transport, nucleation localization, and composition will be required when the uniformity of produced patterned microcrystals is desired.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 8
·3880-3889
·
IF 3.9
Wang Haiping,An Xianhui,Qian Xueren
Fluorescent anti-counterfeiting paper was a very important kind of special paper, which played an important role in people’s life, such as paper money. In this work, fluorescent anti-counterfeiting paper was prepared by using lead-metal–organic framework (Pb-BTC) that was in situ formed on the surface of pulp fibers (PFs) with lead ions and pyromellitic acid (H 4 BTC), which served as template to in situ anchoring of CH 3 NH 3 PbBr 3 (MAPbBr 3 ) to achieve the controllable synthesis of MAPbBr 3 and reduce aggregate fluorescence quenching. The CH 3 NH 3 Br (MABr) as the anti-counterfeiting ink was applied on Pb-BTC@PFs to achieve security writing. MAPbBr 3 forming writing was invisible under sunlight but displayed green fluorescence under 365 nm ultraviolet lamp excitation. The writing with green fluorescence could be extinguished by water and reconstructed by forming new MAPbBr 3 . The Pb-BTC@PFs was as the precursor to product fluorescent anti-counterfeiting paper (MAPbBr 3 @Pb-BTC@PFs) reacted with MABr in ethanol solution, so that the green fluorescence of it was opened under 365 nm ultraviolet lamp. When it was exposed to polar solution, MAPbBr 3 structure collapsed. Since Pb-BTC was stably in paper and was not easy to lose in polar solution, it could be reused several times on the premise that the paper structure was not damaged, which demonstrated an advantage over using perovskite alone in paper. Consequently, the current study not only provided a new idea for controllable anchoring perovskite on support materials, but also offered a new method for producing fluorescent anti-counterfeiting paper.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xuyang Liu,Chao Shi,Dongxu Guang,Lijuan Yao,Bobo Li,Xuan Fang,Mingxia Qiu,Dan Wu,Peigang Han
Metal halide perovskites have triggered numerous studies in the application of optoelectronic devices. In this work, we incorporated Ce3+ ions into the MAPbBr3 perovskite to extend the photoluminescence spectrum from the green light region to red light region, which can be attributed to the dopant-induced self-trapped exciton (STE) emission. Furthermore, the non-equivalent substitution of Ce3+ ions for the Pb2+ ions can result in extra electrons, thus can change the type of dominant carriers and improve the carrier mobility. The MAPbBr3:Ce based photodetector exhibited a broadband photodetection capability over a wide range from 340 nm to 650 nm. In addition, after doping Ce3+ ions, the maximum device responsivity, detectivity and external quantum efficiency were efficiently improved. These results provide a new approach to highly-efficient and broadband-detecting photoconductive photodetectors.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）