LANGMUIR
·
2025
·
IF 3.9
Haochen Zhou,Mengbiao Liang,Ting Chen,Yiyuan Peng,Wenkui Wu,Youpeng Li,Mengdi Zhao,Chunxian Guo,Zhixiang Xie
All-inorganic perovskite nanocrystals (NCs) offer excellent optoelectronic properties but suffer from poor stability under environmental factors such as water, oxygen, and heat, which limits their broader applications. To address this, we developed a two-stage heating method to synthesize cruciform CsPbBr3 NCs, followed by embedding them in a silica matrix to enhance both fluorescence and stability. The CsPbBr3 NCs measured 30.5 nm in length and 28.5 nm in width. Coating with SiO2, derived from 3-aminopropyl triethoxysilane (APTES) with an APTES/Pb molar ratio of 2.0, increased the photoluminescent quantum yield (PLQY) from 65% to 87%. The CsPbBr3@SiO2 composite retained 27% of its fluorescence after 210 min in ethanol, while the pristine CsPbBr3 NCs were almost fully quenched. After storage in water for 24 h, the PL intensity was 43.5% for the CsPbBr3@SiO2 composite and 3.6% for uncoated NCs. At 398 K, the composite retained 31% of its PL while uncoated NCs were nearly fully quenched. The CsPbBr3@SiO2-based white-light-emitting diode (WLED) exhibited a color rendering index (CRI) of 40.4, a correlated color temperature (CCT) of 5218 K, and a luminous efficiency of 35 lm/W, covering 134.5% of the NTSC color gamut, demonstrating excellent potential in WLED applications.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Lan Ding,Burenbayaer Borjigin,Yuning Li,Xiaoxue Yang,Xiaojing Wang,Huiqin Li
Conversion of CO2 into valuable chemical feedstocks through artificial photosynthesis is an effective strategy to alleviate energy and environmental issues. Herein, we have developed a novel perovskite-based catalyst via in situ growing CsPbBr3 quantum dots (QDs) on the affinal 2D CsPb2Br5 nanosheets for CO2 photoconversion. CsPbBr3 QDs were generated by peeling off layers from their cubic counterpart; meanwhile, CsPb2Br5 nanosheets were formed by heaping up the peeled layers. The resultant dual-phase composite exhibited outstanding activity and selectivity for photocatalytic conversion of gaseous CO2 with a CO generation rate of 197.11 μmol g–1 h–1 under 300 W Xe lamp irradiation, which is 2.5 and 1.1 times higher than that of pure CsPb2Br5 or CsPbBr3. Importantly, the fabricated dual-phase material presented extremely high stability and was able to maintain an unchangeable CO2 conversion rate under wet air in the consecutive 10 h of recycling test. Furthermore, attributing to the in situ assembling strategy, the close contact allowed photo-generated electrons in CsPbBr3 QDs to transfer rapidly to CsPb2Br5, and the affluent active sites in such an architecture enabled achieving enhanced CO2 photoconversion activity. The present work provides an attractive approach for in situ constructing a consubstantial perovskite-based composite photocatalyst to ensure great stability and excellent activity for artificial photocatalytic CO2 conversion.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Tianqing Sheng,Shuqin Zhang,Xuguang Wei,Xinran Lv,Zhigang Yang
The porous Ti/perovskite composites were prepared successfully by ultrasound-assisted infiltration method. The Cs–Pb–Br perovskite materials were prepared on a larger scale by the mechanical ball-milling using the CsBr and PbBr 2 as the precursors. The Cs–Pb–Br perovskites had high PL intensity and excellent stability, meanwhile, the complex phase transformation between CsPbBr 3 and Cs 4 PbBr 6 occurred during the ball-milling process. The green fluorescence emission of composites might be attributed to CsPbBr 3 embedded within Cs 4 PbBr 6 perovskite. By the space occupying method, the porous Ti materials were prepared by using the acicular urea as the pore forming. The optimal young's modulus (1.0851 GPa) and porosity (38.27 %) were obtained. Finally, the prepared Ti/perovskite composites had outstanding fluorescence property and high stability, showing the wide application prospect in the fields of the bioflourescence imaging and nondestructive testing fields.
研究领域:
材料科学
·
光学
·
生物医学工程
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高影响因子
OPTICS EXPRESS
·
2025
·Vol. 33
·期 21
·45462-45473
·
IF 3.3
Liangjie Li,Liangjie Li,Liangjie Li,Qilin Wei,Ye Tian,Ye Tian,Ye Tian,Huan Fei Wen,Huan Fei Wen,Huan Fei Wen,Huizhen Yao,Le Zhang,Le Zhang,Zhenrong Zhang,Mengwei Li,Jun Tang,Jun Tang,Jun Tang,Jun Tang,Jun Liu,Jun Liu,Jun Liu,Jun Liu
The magneto-optical effect provides a means of optical manipulation for materials and plays a significant role in optical signal modulation. However, the regulation of magneto-optical anisotropy remains challenging. This study reports the impact of Cr3+ doping on the optical anisotropy of CsPbBr3 perovskite under a magnetic field. Experimental observations revealed that Cr3+ doping successfully induced dual emission peaks corresponding to the antiferromagnetic polaron (AMP) and the exciton magnetic polaron (EMP), resulting in a blue shift in the photoluminescence (PL) spectrum. Polarization-resolved PL measurements demonstrated that Cr3+ doping significantly enhanced the magnetic field sensitivity of CsPbBr3. The optical anisotropy progressively transitioned towards isotropy with increasing magnetic field strength, with the AMP exhibiting stronger magnetic field sensitivity than the EMP. Furthermore, density functional theory (DFT) calculations indicated that Cr3+ doping substantially modified the electronic band structure of the material. These findings provide a viable strategy for tuning the magneto-optical anisotropy of lead halide perovskites, demonstrating significant potential in applications such as magneto-optical modulators and quantum sensing devices.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Changbo Deng,Yu Zhang,Dachuan Zhang,Zhulu Xie,Qiuping Huang,Zhengping Fu,Yalin Lu
Direct optical patterning of perovskite colloidal quantum dots (QDs) mediated by surface chemistry has emerged as a critical focus for new display technologies. However, the instability of weakly bound ligands on QD surfaces significantly restricts their practical applications. To address this challenge, we propose a novel and straightforward strategy that utilizes the strongly binding zwitterionic photocrosslinkable ligand 2-methacryloyloxyethyl phosphorylcholine (MPC) via ligand exchange, enabling direct optical patterning of CsPbBr 3 QDs without requiring an inert environment or precise ultraviolet (UV) light intensity control. The MPC ligand exhibits dual functionality: it effectively passivates QD surface defects, achieving a photoluminescence quantum yield (PLQY) of 83.8 ± 1.4 % for CsPbBr 3 QD colloidal solutions, while simultaneously enabling direct optical patterning in ambient air. This patterning mechanism relies on methacrylate groups that initiate polymerization upon UV irradiation, forming a robust crosslinked network. The resulting patterns exhibit a high PLQY of 72.5 ± 5.9 %. Additionally, theoretical calculations reveal that the planar orientation of MPC ligands on the QD surface minimizes inter-QD spacing, promoting the formation of dense and smooth films. This innovative approach not only enhances the optical performance of CsPbBr 3 QDs but also paves the way for their practical implementation in high-quality, vivid image displays.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
显示技术
·
表面化学
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高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Jin-Feng Liao,Ya-Ting Cai,Jun-Yan Li,Yong Jiang,Xu-Dong Wang,Hong-Yan Chen,Dai-Bin Kuang
The optoelectronic performance of CsPbBr 3 nanocrystal (NC) has been dramatically limited by the severe charge carrier recombination and its narrow light absorption range, which are anticipated to be resolved via coupling with plasmonic Au nanoparticle (NP). In view of this, CsPbBr 3 –Au nanocomposite is fabricated and further employed as a concept model to study the electronic interaction between perovskite NC and Au NP for the first time. It has been found that the excitation-wavelength dependent carrier transfer behavior exists in CsPbBr 3 –Au nanocomposite. Upon illumination with visible light ( λ >420 nm), photo-generated electrons in CsPbBr 3 can inject into Au with an electron injection rate and efficiency of 2.84 × 10 9 s −1 and 78%, respectively. The boosted charge separation is further translated into a 3.2-fold enhancement in CO 2 photocatalytic reduction activity compared with pristine CsPbBr 3 . On the other hand, when solely exciting Au NP with longer wavelength light ( λ >580 nm), the localized surface plasmon resonance (LSPR) induced hot electrons in Au NPs can transfer to CsPbBr 3 NC and further participate in photocatalytic reaction towards CO 2 reduction. The present study provides new insights into preparing plasmonic nanostructure to enhance the performance of perovskite based optoelectronic devices.
研究领域:
材料科学
·
光化学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Yufeng Zhou,Yanxia Yu,Yaqian Zhang,Xiaodong Liu,Haisheng Yang,Xiaojuan Liang,Wei Xia,Weidong Xiang
All-inorganic halide perovskite (CsPb2Br5) nanocrystals (NCs) have received widespread attention owing to their unique photoelectric properties. This work reports a novel strategy to control the phase transition from CsPbBr3 to CsPb2Br5 and investigates the effects of different treatment times and treatment temperatures on perovskite NCs formation. By controlling the volume of tetraethoxysilane (TEOS) added, the formation of different phases of perovskite powder can be well controlled. In addition, a white light-emitting diode (WLED) device is designed by coupling the CsPbBr3/CsPbBr3–CsPb2Br5 NCs@TEOS nanocomposite and CaAlSiN3:Eu2+ commercial phosphor with a 460 nm InGaN blue chip, exhibiting a high luminous efficiency of 57.65 lm/W, color rendering index (CRI) of 91, and a low CCT of 5334 K. The CIE chromaticity coordinates are (0.3363, 0.3419). This work provides a new strategy for the synthesis of CsPbBr3/CsPbBr3–CsPb2Br5 NCs@TEOS nanocomposite, which can be applied to the field of WLEDs and display devices.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
发光二极管（LED）
·
光子学
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高影响因子
INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Song Wei,Yanchun Yang,Xiaojiao Kang,Lan Wang,Lijian Huang,Daocheng Pan
Highly luminescent CsPbBr3 perovskite nanocrystals (PNCs) are homogeneously synthesized by mixing toluene solutions of PbBr2 and cesium oleate at room temperature in open air. We found that PbBr2 can be easily dissolved in nonpolar toluene in the presence of tetraoctylammonium bromide, which allows us to homogeneously prepare CsPbBr3 perovskite quantum dots and prevents the use of harmful polar organic solvents, such as N,N-dimethylformamide, dimethyl sulfoxide, and N-methyl-2-pyrrolidone. Additionally, this method can be extended to synthesize highly luminescent CH3NH3PbBr3 perovskite quantum dots. An electroluminescence device with a maximal luminance of 110 cd/m2 has been fabricated by using high-quality CsPbBr3 PNCs as the emitting layer.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
钙钛矿量子点
·
发光二极管
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 25
·8431-8437
·
IF 6.4
Sixin Chen,Weiwei Liu,Meng Xu,Pan Shi,Menghua Zhu
CsPbBr3 perovskite materials have demonstrated excellent X-ray detection performance, including high sensitivity, owing to their high absorption coefficient, high carrier mobility, and long carrier lifetime. However, the large-scale preparation of CsPbBr3 perovskite films characterized by a flexible and large area can still hardly be accomplished, which impedes their application for X-ray imaging. Herein, an improved electrospray method is developed to successfully prepare a flexible CsPbBr3 film with an area of 5 × 5 cm2. By optimizing the solvent system and the temperature of crystal growth, a highly crystalline film is obtained without pinholes or microcracks. An assembled interdigital detector displays a resistivity of 1.14 × 109 Ω cm and outstanding performance with an X-ray sensitivity of 823.12 μC Gyair−1 cm−2 under a 20 kVp X-ray source. Furthermore, the X-ray detection limit of the flexible CsPbBr3 film is 14.61 nGyair s−1. The facile preparation of flexible CsPbBr3 films and their superior X-ray detection performance exhibit their huge potential applications in the areas of X-ray imaging, non-destructive inspection and other photoelectric devices.
研究领域:
材料科学
·
光电子学
·
辐射探测
·
钙钛矿电子学
·
纳米制造
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 29
·10971-10978
·
IF 5.7
Jiachen Zhang,Shuyue Feng,Qun Zhang
We present a mechanistic study of harnessing Auger suppression through a strategy of facet engineering on two contrasting perovskite systems of facet-controlled CsPbBr3 nanocrystals (CPB NCs), i.e., dodecahedron CPB (d-CPB) NCs vs. cubic CPB (c-CPB) NCs. It is found that d-CPB achieves a better suppression of Auger recombination than c-CPB. We employe ultrafast transient absorption spectroscopy, photoluminescence spectroscopy and spectroscopic ellipsometry to interrogate the underlying mechanisms from multiple perspectives, mainly addressing the volume scaling, dielectric screening and polaronic effects. The static dielectric screening effect is revealed to prevail over the dynamic polaronic screening effect. Compared to c-CPB NCs featuring nonpolar facets, d-CPB NCs featuring polar facets exhibit an elevated dielectric response (in the optical-frequency region) and strengthened screening of electron–hole Coulomb interaction, which accounts for the observed improvement in Auger suppression. As a proof of principle, the achieved modulation of Auger recombination via facet engineering is successfully materialized by a set of performance tests on c-CPB/d-CPB NC-based light-emitting diodes.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
钙钛矿光子学
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高影响因子
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2023
·Vol. 41
·期 1
·55-61
·
IF 1.9
Feng Hua,Xin Du,Zhenyu Huang,Yiting Gu,Jianfeng Wen,Fuchi Liu,Junxue Chen,Tao Tang
Self-powered photodetectors (SPPDs) are attracting considerable publicity due to their superiority over conventional photodetectors (PDs) in terms of high sensitivity, fast response, and no need for an external power supply. Halide perovskites are much anticipated in SPPDs for their unusual photoelectronic properties. This work developed a Schottky junction ${{\rm CsPbBr}_3}/{\rm n} \text{-} {\rm Si}$ SPPD by growing stable all-inorganic ${{\rm CsPbBr}_3}$ microcrystals on an n-Si substrate using a solution method. At zero bias, such Schottky SPPD has a very weak dark current (0.3 pA), a wide linear dynamic range (LDR, 110 dB), a sizeable on–off ratio (${\gt}{{10}^3}$), and high detectivity (${1.05} \times {{10}^{11}}\;{\rm Jones}$). Through the research of this project, it is expected to obtain a way to prepare Schottky photodiodes with high stability and self-driving capability.
研究领域:
材料科学
·
光电子学
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高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Song He,Mufan Zhu,Shixuan Dong,Juanjuan Wang,Liqiong Du,Wenkang Zhong,Wenju Xie,Zhiyong Ouyang,Baochang Cheng,Jie Zhao
Understanding the intricate interplay between electrode reactivity and interfacial chemistry is crucial for advancing halide perovskite memristors toward practical applications. Here, we systematically investigate how top electrode materials (Au, Ag, Cu, Al) influence the resistive switching behavior of quasi-2D CsPbBr 3 devices through controlled interfacial engineering. By introducing a novel bilayer electrode architecture, we successfully decouple electrode surface oxidation effects from perovskite/electrode interfacial oxidation reactions for the first time. In situ XRD, photoluminescence spectroscopy, and interfacial XPS analysis reveal that voltage-driven bromide ion migration coupled with electrode-dependent reactions governs the switching mechanisms. Chemically inert Au electrodes show no switching due to insufficient interfacial reactivity, while highly reactive Al electrodes cause irreversible degradation through excessive chemical interactions. In contrast, moderately active Ag and Cu electrodes enable stable bipolar switching with dual negative differential resistance characteristics. The optimal performance emerges from balanced electrode reactivity that facilitates reversible interfacial redox reactions without structural degradation. These findings establish fundamental design principles linking electrode chemical activity to device functionality, providing a rational framework for engineering robust perovskite memristors with enhanced stability and performance for next-generation memory and neuromorphic computing applications.
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