Nature Communications
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2020
·Vol. 11
·期 1
·1-10
·
IF 12.121
Yu Dejian,Wang Peng,Cao Fei,Gu Yu,Liu Jiaxin,Han Zeyao,Huang Bo,Zou Yousheng,Xu Xiaobao,Zeng Haibo
Ensuring nuclear safety has become of great significance as nuclear power is playing an increasingly important role in supplying worldwide electricity. β-ray monitoring is a crucial method, but commercial organic scintillators for β-ray detection suffer from high temperature failure and irradiation damage. Here, we report a type of β-ray scintillator with good thermotolerance and irradiation hardness based on a two-dimensional halide perovskite. Comprehensive composition engineering and doping are carried out with the rationale elaborated. Consequently, effective β-ray scintillation is obtained, the scintillator shows satisfactory thermal quenching and high decomposition temperature, no functionality decay or hysteresis is observed after an accumulated radiation dose of 10 kGy (dose rate 0.67 kGy h −1 ). Besides, the two-dimensional halide perovskite β-ray scintillator also overcomes the notorious intrinsic water instability, and benefits from low-cost aqueous synthesis along with superior waterproofness, thus paving the way towards practical application.
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RSC Sustainability
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2025
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IF 4.9
Lei Zhang,Donglin Tang
Suffered from the highly flexible structure, polymers based on epoxidized soybean oil (ESO) generally exhibit poor mechanical properties. This work aims at improving the mechanical properties by incorporating urea-bond into the backbone of such polymers. Polyureas (PUr) were designed and prepared successfully via a one-pot strategy, from urea, 1,10-decanediamine (DDA) and ESO. In this one-pot strategy, urea first reacted with DDA to form oligourea which would then polymerize with ESO. The content of urea function can be adjusted by simply changing the feeding ratio of urea/DDA and epoxy/ureido, which is to tune the mechanical properties of the obtained PUr. Compared with the two-pot synthetic method in which ESO was polymerized with 1,10-decylene bisurea (DBU), the thermal and mechanical properties of the one-pot PUr are comparable. When keeping the equal amount of ureido and epoxy groups but changing the feeding ratio of urea/DDA from 2:1 to 3:2 and even to 4:3, the glass transition temperature of PUr increases from 26.9 to 56.4 °C, as detected by dynamic mechanical thermal analysis. And the tensile strength increases from 8.2 to 17.7 MPa while the elongation at break declines from 430% to 180%. The one-pot synthetic strategy towards PUr, which is developed in this work, is promising in the construction of high performance vegetable oil-based sustainable polymers.
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Materials Horizons
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2025
·
IF 10.7
Hongfei Liang,Lu Chen,Yang Wu,Youwen Xue,Yuxuan Wang,Wenjie Ji,Huanqi Cao,Qian Zhao,Jian Song,Guoran Li
Luminescence down-shifting technology is increasingly recognized as a crucial option for enhancing the efficiency of silicon solar cells. However, high-quality down-shifting materials, such as perovskite quantum dots, face challenges related to poor thermal stability. These materials tend to agglomerate into larger sizes, leading to the deterioration of the luminescence films at high temperature. Unlike introducing a protecting layer on perovskite quantum dots, we applied 3-aminopropyltriethoxysilane (APTES) as a direct capping agent for perovskite quantum dots in this work to achieve both efficient and stable composite down-shifting films. The interaction between APTES and CsPbBr3 quantum dots is thoroughly analyzed using both experimental measurements and theoretical calculations. Due to the strong interaction between APTES and CsPbBr3, an optimal amount of APTES effectively stabilizes the quantum dots. When mixed with ethylene-vinyl acetate (EVA) copolymer, the strong interaction between APTES and polymer chains could suppress the aggregation of CsPbBr3 quantum dots and inhibit degradation of the composite film under heating. Upon coating on commercial crystalline silicon solar cells, the optimal CsPbBr3 quantum dot/EVA composite film achieves an absolute efficiency by 1.00%, maintaining a 0.81% efficiency improvement even after annealing at 90 °C for 3 hours. In contrast, while the film without APTES shows an efficiency improvement of 0.63% at room temperature but experiences a decrease of 0.23% under the same heating conditions. This work provides a feasible strategy to enhance the thermal stability of CsPbBr3 quantum dot/EVA composite films under high-temperature conditions, offering a promising path toward the commercial application of perovskite-based luminescence down-shifting films in silicon solar cells.
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Journal of Physical Chemistry C
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2025
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IF 3.2
Yi Wu,Zhangwei Guo,Zhuolu Li,Song Wang,Jiaxin Rui,Zhaogang Teng,Lihong Qi,Kai Pan
Metal halide perovskites (MHPs) have emerged as prominent materials in optoelectronics due to their exceptional photoelectric conversion efficiency and tunable band structures. Traditional perovskite nanocrystal synthesis systems often employ oleic acid (OA) to accelerate the crystallization kinetics, which inadvertently hinders nanowire growth and morphology control. In this study, we adopted a dual-ligand system using oleylamine (OAm) and octylamine (OctAm) without preadding OA. By postinjecting a cesium oleate solution, we achieved precise control over Pb2+ ion release, enabling the controllable synthesis of cesium lead halide (CsPbBr3) nanowires (NWs) across 100–160 °C. This strategy yielded micrometer-scale NWs with tunable diameters (8.3–12.6 nm) and lengths reaching the microscale. Temperature-dependent optical studies revealed that elevated synthesis temperatures weakened quantum confinement effects, leading to systematic red-shifts in ultraviolet–visible (UV–vis) absorption (505–507 nm) and photoluminescence (PL) emission (516–518 nm) peaks. Concurrently, time-resolved PL measurements revealed a significant enhancement in carrier lifetime (24.72–91.99 ns), reflecting reduced nonradiative recombination pathways. Variable-temperature PL spectroscopy (80–300 K) demonstrates that CsPbBr3 NWs synthesized at 140 °C exhibit higher exciton binding energy (Eb = 44.7 meV) and enhanced exciton–phonon coupling strength (ΓOP = 46.48 meV) compared to samples prepared at 120 °C. These findings demonstrate that high-temperature synthesis confers superior thermal stability on CsPbBr3 NWs. Our work not only clarifies the critical role of amine ligands in modulating NW growth dynamics but also provides a robust framework for designing stable, high-performance, one-dimensional perovskite optoelectronic materials.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Juan Gao,Qin Gao,Jiangshun Huang,Xueli Geng,Pengzhan Li,Yihang Liu,Qiaofeng Yang,Hao Zhang,Mei Wang,Zhisong Xiao,Paul K. Chu,Ruifeng Lu,Anping Huang
Low-power and color-sensitive neuromorphic vision systems are critical to the next generation of intelligent devices. Here, we report a coral-inspired, lead-free synaptic device based on Cs3Bi2Br9 perovskite nanocrystals prepared by centrifugal casting into a porous thin film. The device exhibits wavelength-dependent plasticity under 405, 520, and 635 nm illumination without an external bias. By modulating the light wavelength and intensity, short-term and long-term synaptic plasticity are achieved to mimic excitatory, inhibitory, and saturating biological responses. Structural and spectroscopic analyses reveal that bromine vacancies play a key role in the dynamic modulation of carrier transport and plasticity evolution. The efficient preprocessing of RGB visual information significantly enhances recognition accuracy in artificial neural network devices. This wavelength-specific modulation of synaptic plasticity, a novel approach for color image preprocessing and recognition, is very promising for the advancement of neuromorphic systems.
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Gels
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2025
·Vol. 12
·期 1
·27
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IF 5.3
Yuyao Wang,Dou Jin,Zichen Huang,Fan Chen,Kun Liu,Xiacong Zhang
Dynamic covalent hydrogels exhibiting multi-responsive and antibacterial properties offer significant potential for biomedical applications, including smart wound dressings and controlled drug delivery. Herein, a series of amphiphilic quaternized copolymers (Q-C8PEG-n) with tunable quaternization degrees was synthesized from C8PEG via iodomethane addition and characterized by1H NMR, COSY, FTIR, UV-vis spectroscopy, DLS, TEM, and zeta potential analyses, confirming successful quaternization and micelle formation. These copolymers displayed thermosensitive behavior, with cloud point temperatures increasing due to enhanced hydrophilicity. Q-C8PEG-3 micelles, incorporating diethanolamine units, were crosslinked with phenylboronic acid-grafted hyaluronic acid (HA-PBA) to yield dynamic covalent hydrogels (Gel) through reversible boronic ester bonds stabilized by B-N coordination. The Gel exhibited multi-responsiveness, undergoing degradation in acidic or alkaline conditions and exposure to glucose or H2O2. SEM confirmed a porous microstructure, enabling efficient drug encapsulation, as demonstrated by the release of Nile red (NR). In vitro antibacterial tests revealed enhanced post-quaternization efficacy, with the Gel showing strong activity againstS. aureus. This micelle-crosslinked platform synergistically combines tunable stimuli-responsiveness with inherent antibacterial properties, holding promise for applications in wound healing and tissue engineering.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Changbo Deng,Yu Zhang,Yuchen Zhou,Shulin Han,Lei Cai,Qiuping Huang,Zhengping Fu,Yalin Lu
Cesium lead halide perovskite quantum dots (CsPbX 3 QDs) exhibit outstanding optoelectronic properties but suffer from structural instability and luminescence degeneration. The long-chain ligands widely adopted to stabilize CsPbX 3 QDs exhibit poor charge transport due to their weak binding and insulating nature, which is unfavorable for optoelectronic applications. To address this, we developed a novel short-chain fluoroammonium ligand, octylammonium fluoride (OTAmF), for the post-treatment of CsPbX 3 QDs. The fluoride ions (F − ) in OTAmF effectively passivate bromine vacancies, whereas the short-chain ammonium cations enhance surface passivation and carrier transport. This strategy significantly improved the photoluminescence quantum yield (PLQY) of green-emitting CsPbBr 3 QDs from 56.8 % to 96.4 %, doubled their thin-film conductivity, and dramatically enhanced their photostability, thermal stability, and long-term storage stability. The approach was successfully extended to blue- (CsPbBr 1.8 Cl 1.2 ) and red-emitting (CsPbBr 0.8 I 2.2 ) QDs, universally increasing their PLQY and stability. Density functional theory (DFT) calculations revealed that, compared with OA (0.73 eV) and OAm (0.27 eV), OTAmF has a superior binding energy (1.74 eV) and enhanced charge transfer and defect passivation capabilities. This OTAmF post-treatment strategy provides a promising pathway for developing high-performance optoelectronic devices based on perovskite QDs.
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Laser & Photonics Reviews
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2025
·
IF 10
Yichuan Wang,Chengjie Deng,Jing Liu,Long Chen,Sen Li,Peiyan Zhang,Tianhao Cui,Yongshun Wang,Boxiang Song,Xing Zhou,Ying Zhou,Jianbing Zhang,Liang Gao,Jiang Tang
PbS colloidal quantum dots (CQDs) offer solution-processability, tunable bandgap, and monolithic integration with complementary metal oxide semiconductor (CMOS) readout circuit, making them highly adaptable for advanced infrared detection. However, optimizing interfacial quality remains critical for achieving high performance of PbS CQDs imager. In particular, the hydrophobicity of the C 60 sacrificial layer disrupts the atomic layer deposition of SnO 2 , leading to poor film uniformity, low density, and increased interfacial defects. To address this, a hydrophilic WO x interlayer atop C 60 is introduced, significantly improving SnO 2 deposition, reducing interfacial defects, and suppressing dark current density to 287 nA/cm 2 at −0.5 V. This strategy also mitigates halide ion migration from halide-passivated CQDs surface to SnO 2 layer, enhancing device stability. Consequently, this CQDs photodiodes achieve a high specific detectivity of 2.47 × 10 12 cm·Hz 1/2 ·W −1 . Furthermore, the monolithically integrated CQDs imager with CMOS readout circuit demonstrates advanced capabilities for material differentiation and penetration imaging.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Boying Ding,Xiaoming Wu,Jiongpeng Zhao,Wuyan Hou,Longni Chen,Jiahao Cui,Shiji Ma,Shougen Yin
Lead halide perovskite quantum dots (PeQDs) exhibit excellent optical properties and have garnered impressive attention in displays and lighting. However, the inherent aggregation and poor stability of PeQDs severely limit their practical applications in various fields. Herein, we report an ultrasound-assisted microemulsion (US-MEs) in situ synthesis to prepare highly bright, pure and stable CH 3 NH 3 PbBr 3 (MAPbBr 3 ) QDs encapsulated within the porous zeolitic imidazolate framework-11 (ZIF-11) for the first time. The MAPbBr 3 @ZIF-11 composites demonstrated distinctive narrow-band cyan emission at 505 nm with a full width at half maximum (FWHM) of 18 nm and an ultra-high fluorescence quantum yield exceeding 85 %. Notably, the composites also showed outstanding solvent, thermal, UV radiation and environmental stability. Thanks to the framework protection and inner passivation for uniformly dispersed MAPbBr 3 QDs, they present premium optical properties and superior stability, outperforming previously reported green emissive composites. Furthermore, we successfully demonstrated the feasible applications of MAPbBr 3 @ZIF-11 composites in fluorescent probes, information encryption and wearable sensors. The facile and effective synthetic strategy proposed in our work provides a guideline for achieving high quality PeQDs based on nanoconfined approach, thus unlocking their full potential in multifunctional applications.
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JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Hong Ma,Zhanying Yu,Aimin Zhang,Jihai Zhang
Lithium-metal batteries are ideal energy storage devices due to their potential and capacity expansion over conventional lithium-ion batteries. However, their problems in energy storage safety, such as inevitable electrolyte leakage, flammability, explosion risks, and vulnerability to external puncture, inhibit their application in energy storage, especially flexible energy storage. In this work, a grease quasi-solid electrolyte is designed, which effectively suppresses electrolyte leakage and spontaneous combustion. A network structure constructed by dimer small molecules is proposed for application in electrolyte materials. A unique quasi-solid electrolyte network structure is obtained, which effectively accommodates the electrolyte and inhibits combustion. In addition, the ion transfer of quasi-solid-state batteries is not significantly inhibited, and they can still maintain a relatively stable cycle. In the half-cell test, the overpotential remains at 1.294 mV, and the battery capacity reaches 187.26 mAh/g at a unit mass current density of 5.95 mA/g. This work provides an idea for quasi-solid electrolyte design and for improving the safety of lithium-metal batteries.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jialong Xu,Yiqing Chen,Shaoan Zhang,Hongqiang Zhu,Ziqing Mao,Ziyi Lin,Zhishan Chen,Huiwang Lian,Ling Gao,Yang Li
Phospholipase D (PLD) activity plays a critical role in tumor progression, yet its highly sensitive detection remains challenging. In this study, we developed metal halide perovskite nanoprobes via a dual-anchoring strategy that employed co-encapsulation of phospholipid and cholesteryl hemisuccinate (Chs) for the sensitive and selective monitoring of PLD activity. The Chs molecule not only enhances the stability of the phospholipid membrane via its cholesterol moiety but also passivates surface defects of the perovskite through the succinate group, endowing the nanoprobes with exceptional optical properties (PLQY >90 %) and long-term aqueous stability (> 7 days). The nanoprobe operates via a turn-off fluorescence response triggered by PLD-specific hydrolysis of the phospholipid layer, achieving a low detection limit of 0.51 U/L and a wide linear range (5–2000 U/L) with good anti-interference capability. Furthermore, the nanoprobes were successfully applied to in situ imaging of PLD activity in living cells, enabling discrimination between tumor cells with different PLD expression levels. This study not only paves the way for designing novel perovskite-based probes for biomedical applications but also offers a valuable fluorescent imaging tool to monitor tumor progression.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 45
·22850-22864
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IF 3.9
Wu Yang,Ding Tongshun,Liang Hongfei,Song Juan,Qu Suteng,Xu Yafei,Song Jian
Crystalline silicon solar cells (CSSCs) continue to dominate the photovoltaic market due to their decreasing costs and increasing efficiency. However, as CSSC efficiency approaches the Shockley–Queisser limit, conventional strategies for further performance improvement have become increasingly ineffective. The photon downconversion effect offers a promising solution. However, obtaining stable and efficient downconversion materials remains a significant challenge. This study proposes using trioctylphosphine (TOP) as a passivating ligand for CsPbBr 3 quantum dots, combined with a ZnO protective layer constructed using Zn(C 2 H 5 ) 2 , to enhance stability and performance. The use of 70 μL TOP and 30 μL Zn(C 2 H 5 ) 2 leads to the optimal downshifting film. The resulting CsPbBr 3 QD@TOP@ZnO/EVA composite film exhibits a significant 0.85% enhancement in CSSC efficiency. In addition, after an 18-day PCE stability test on the device, its PCE efficiency stability was comparable to that of EVA film, demonstrating its potential to enhance solar cell performance by downconverting.
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