ACS Photonics
·
2026
·
IF 6
Xiuting Wu,Tianjun Hu,Qingsong Shan,Hong Zhong,Yuqin Su,Linxiang Yang,Beichen Yuan,Junhui Dai,Yuhao Zhang,Qiangyu Dai,Xiaoming Li,Haibo Zeng
Deep-blue perovskite quantum dot (QD) emitters with narrow emission line widths are critical for next-generation wide-color-gamut QD displays. However, achieving narrow primary deep-blue emission perovskite QDs compliant with Rec. 2100 remains challenging. This difficulty mainly arises from the intrinsic phase segregation of mixed-halide perovskite QDs, the presence of defects, and the inhomogeneous distribution of halide ions among the particles. Herein, we develop a ligand-mediated strategy for the phase separation inhibition and surface reconstruction of CsPb(BrxCl1–x)3 QDs. Specifically, we implement a sequential ligand treatment protocol comprising ion exchange with methyltrioctylammonium chloride, surface cleaning using octylphosphonic acid, and defect passivation via CF3–PEABr. This approach effectively promotes a distinct intergrain isolation and facilitates the homogenized halide distribution throughout the QDs ensemble. The resulting deep-blue quantum dot light-emitting diode (QLED) exhibits stable electroluminescence emission with an ultranarrow full width at half-maximum (fwhm) of 13.4 nm. This achievement marks the narrowest fwhm record of primary deep-blue perovskite QLEDs to date, featuring a 99.1% gamut coverage of Rec. 2100 standard. This work proposes a feasible strategy for ultrahigh color purity deep-blue QLEDs tailored for Rec. 2100 wide-color-gamut displays.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Song Wang,Hongyan Li,Xiaohu Zhao,Jiaxin Rui,Zhaogang Teng,Lihong Qi,Kai Pan
One-dimensional (1D) CsPbI3 nanowires (NWs) are promising for nanoscale optoelectronic applications due to their strong quantum confinement and anisotropic charge-transport characteristics, yet their practical use is severely limited by high defect density and poor structural stability. Here, we report an intrinsic stabilization strategy for CsPbI3 NWs via controlled Y3+ doping. CsPbI3 nanocrystals with different Y3+ contents were synthesized by a hot-injection method and subsequently transformed into 1D NWs through a solvent-induced phase conversion process. Structural characterizations demonstrate that Y3+ ions substitutionally occupy Pb2+ sites, inducing slight lattice contraction without generating secondary phases. Importantly, Y3+ incorporation markedly suppresses nonradiative defect states and enhances optical performance. The CsPbI3 NWs with an optimal Y3+ doping level of 20% exhibit the highest photoluminescence (PL) intensity and a 3-fold increase in average exciton lifetime, from ∼35 ns for pristine NWs to ∼110 ns after doping. Temperature-dependent PL analysis reveals an increased exciton binding energy from 413.6 to 491.2 meV and an enhanced longitudinal optical phonon energy from 465.2 to 614.6 meV, indicating strengthened exciton confinement and improved thermal stability. Moreover, the 20% Y3+-doped CsPbI3 NWs retain approximately 90% of their initial PL intensity after 28 days of ambient exposure, whereas pristine NWs undergo rapid degradation. These results demonstrate that Y3+ doping enables effective lattice-level defect regulation and intrinsic stabilization of CsPbI3 NWs, providing a robust and quantitative design strategy for high-performance and long-lifetime perovskite optoelectronic devices.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Mengjiao Pang,Yanjie Wang,Zengcheng Du,Qiqing Chen,Wenhao Liu,Miaoduo Deng,Yuanyuan Xie,Mingfang Zhu
In this study, a water-soluble perovskite quantum dot (PQDs) based on CsPbI 3 "on-off-on" fluorescent probe was successfully constructed. The probe exhibits red fluorescence emission at 660 nm under 465 nm excitation, and the response mechanism of Cu 2+ -induced fluorescence quenching (OFF) and D-penicillamine (D-PA) triggered fluorescence recovery (ON) is realized. In addition, the dual target detection platform of both copper ions (Cu 2+ ) and D-PA was established. Quantitative analysis showed that the detection linearity range was 0.5–15 μM (LOD = 0.21 μM) for Cu 2+ and 0.4–60 μM (LOD = 16.7 nM) for D-PA. Meanwhile, D-PA can be semi-quantitatively measured based on the change in solution color. The fluorescent probe provides a fast response time, high sensitivity, and convenient solution for real-time detection of Cu 2+ and D-PA. And it was applied in the determination of D-PA in serum samples with satisfactory results. It is particularly noteworthy that the synthesized perovskite quantum dots exhibit excellent stability in the aqueous environment, which provides a new strategy for expanding the application of perovskite materials in the field of biomedical analysis.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Qi Qin,Cheng-Yi Huang,Zhi-Hua Xia,Wei-Qi Liu,Hong-Yan Chen,Dai-Bin Kuang
Rational modulation of interfacial electronic structure has been regarded as an appealing strategy to achieve effective charge separation and synergistic active-site cooperation in heterojunction photocatalysts, yet it remains a significant challenging. In this study, two-dimensional (2D) vinylene-linked conjugated covalent organic polymer (COP) functionalized with –F and –CN groups was designed through Knoevenagel condensation reaction. The influence of these groups on the interfacial properties and the photocatalytic performances of Cs 3 Sb 2 Br 9 /COP heterojunction were investigated systematically. Combined experimental and theoretical calculations revealed that introducing strong electron-withdrawing groups improves charge separation by inducing strong electron delocalization within the COP framework, enhances CO 2 adsorption and activation, and most importantly, significantly facilitates the interfacial growth of Cs 3 Sb 2 Br 9 nanocrystals. It was found that the strengthened interfacial interaction via Sb─N bonding effectively promoted a fast Z-scheme charge transfer and enabled effective spacial separation of photoelectron and holes, in contrast to the type II mechanism observed in the un-functionalized heterojunction. This enables effective multifunctional collaboration of Cs 3 Sb 2 Br 9 and FN-COP. Consequently, the optimized Cs 3 Sb 2 Br 9 /FN-COP heterojunction achieved a total electron rate of 135.42 µmol·g -1 ·h -1 for CO 2 reduction coupled with a benzaldehyde production rate of 179.73 µmol·g -1 ·h -1 , representing a 2.4 and 2.6-fold enhancement over the un-functionalized heterojunction. This work demonstrates a novel "molecular engineering–interface modulation–function cooperation" strategy to construct high-quality heterojunction precisely, providing valuable insights for the design of high-performance photocatalysts for next-generation energy conversion applications.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Jing Li,Xue Jiang,Lingfeng Qiu,Tianze Wen,Jinju Zheng,Jialong Zhao,Bingsuo Zou,Zhentao Du
All-inorganic perovskites hold great potential for applications in photodetectors due to their high absorption coefficient and excellent charge transport properties. However, they still face challenges such as high defect densities and insufficient stability. In this work, we successfully synthesized high-purity, high-crystallinity CsPbBr3 nanobelts via a hot-injection method with the introduction of the short-chain ligand octylamine. The as-prepared CsPbBr3 nanobelts can remain stable in air for more than 8 weeks. The photodetector constructed based on CsPbBr3 nanobelts exhibits excellent performance, with a responsivity, detectivity, and external quantum efficiency of 100.72 A W−1, 6.01 × 1013 Jones, and 3.34 × 104%, respectively, which are comparable to the best one-dimensional (1D) CsPbBr3 photodetectors reported to date. This study provides insights and guidance for the preparation of high-quality 1D CsPbBr3 nanomaterials and the development of high-performance ultraviolet devices.
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Science China-Materials
·
2026
·
IF 7.7
Li Mingxing,Fan Pingping,You Wenwu,Liu Shuanglai,Yan Shijia,Zhang Huimin,Zhang Huafang,Pan Gencai,Mao Yanli
Recent years have witnessed growing research interest in two distinctive optical phenomena, photochromism (PhCh) and persistent luminescence (PersL). However, effectively integrating both functionalities into a single host material remains a major challenge, primarily due to the complex role defects play in modulating the material’s optical properties. To address this fundamental issue, this study employs structurally simple CsX (X = Cl, Br) nanocrystals (NCs) as a model system to systematically elucidate the relationship between defects and optical behaviors. We propose for the first time that CsX NCs can accommodate two distinct types of chlorine vacancy defects upon X-ray irradiation—one intrinsic from synthesis and one induced by X-rays—enabling the integration of PhCh and PersL in a single matrix. Specifically, under X-ray irradiation at 20–70 kV, the material exhibits reversible blue coloration, which stems from recoverable chlorine vacancies that can be rapidly eliminated by visible light within 30 s. This PhCh behavior demonstrates excellent cycling stability, with a color difference (ΔRL 1 ) of 56.9% and a recovery rate (ΔRL 2 ) of 98.1%. Furthermore, the introduction of Br − effectively deepens the energy level of intrinsic chlorine vacancies from the range of 0.47 to 0.71 eV up to 0.83 eV, resulting in intense PersL that lasts for more than 30 min. Such dual-mode PhCh–PersL characteristics endow these NCs with considerable potential for practical applications, particularly in the field of X-ray colorimetric imaging and dynamic anti-counterfeiting.
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ACS Sensors
·
2026
·
IF 10.9
Zhefu Mu,Xianjie Xu,Jiaxin Sun,Guo Chen,Zijun Huang,Xinkai Qi,Hongwei Liu,Yanhong Wei,Jialiang Zhou,Peng Wang,Xiuquan Gu,Sheng Huang
Monitoring internal electrolyte decomposition byproducts is pivotal for the early warning of thermal runaway in lithium-ion batteries yet remains a formidable challenge due to the harsh chemical environment. Herein, we engineer a robust electrochemical sensor based on a CsPbBr3/Al2O3@EVA heterojunction architecture to achieve real-time, in situ tracking of lithium methoxide (CH3OLi) evolution. Through interface engineering, the synthesized quantum dot−Al2O3 composite (8.7at%Al) achieves exceptional stability in reducing electrolytes, attributed to the synergistic dual-passivation of Br−Al interfacial bonding and EVA encapsulation. The sensor exhibits superior sensitivity (0.3 at 10% CH3OLi) and rapid kinetics (response/recovery: 8.98 s/56.11 s), driven by the promoted molecular diffusion in mesoporous Al2O3 and polarized adsorption within the Pb+2−Br− framework. Density functional theory (DFT) calculations further corroborate this mechanism, revealing a strong Li+ binding energy of −1.54 eV at Al−O−Br active sites. Furthermore, by integrating the sensor signals with an XGBoost machine learning algorithm (accuracy >99%), we demonstrate a smart monitoring system capable of accurately predicting battery voltage variations and identifying potential safety hazards. This work establishes a new paradigm merging interface-stabilized materials with intelligent algorithms, transforming battery safety management from passive protection to active early warning.
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高影响因子
CHEMISTRY OF MATERIALS
·
2026
·Vol. 38
·期 17
·8816-8828
·
IF 7.1
Jiang Xinyu,Li Qiulei,Fernández-Carrión Alberto J.,Kuang Xiaojun,Yang Xiaoyan
Alkali-metal ion substitution has emerged as a promising
strategy
for engineering advanced solid-state ionic conductors. In this work,
a series of A-site-substituted CaWO 4 ceramics (A = Na,
K, Cs; 5% nominal substitution) was synthesized via solid-state reaction.
A systematic investigation of phase formation, structural stability,
and electrical properties reveals that partial substitution of Ca 2+ by alkali ions enhances the total conductivity by one to
2 orders of magnitude. Quantitative transference-number analysis demonstrates
that charge transport at 800 ° C is dominated by alkali-cation
migration in the Na- and K-substituted samples, with estimated cationic
contributions of approximately 87% and 83%, respectively, whereas
the Cs-substituted sample exhibits comparable cationic and electronic
contribution. Comparative defect-energy calculations indicate that
Na-related interstitial configurations are energetically more accessible
than the corresponding K- and Cs-related configurations among the
examined models. AIMD simulations further visualize a continuous Na + hopping pathway through the available interstitial space
of the scheelite framework. These results suggest that alkali-cation
migration, rather than oxygen-vacancy migration, is primarily responsible
for the enhanced conductivity in Na- and K-substituted CaWO 4 . These results indicate the size-dependent regulation of charge
carriers in alkali-metal-substituted CaWO 4 and provide
mechanistic insights for the rational design of tungstate-based mixed
ion–electron conductors.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zhen Peng,Zhiqing Wang,Yuqing Gan,Jie Shen,Keqiang Chen,Wen Chen,Jing Zhou
Ligand polarization effect directly targets the atomic origin of stochastic ion migration via surface rigid confinement. • Surface octahedra transition from disordered to ordered, rigid state, raising migration barrier from 0.28 eV to 0.42 eV • Two-order-of-magnitude enhancement in ON/OFF ratio with over 70% reduced voltage dispersion and stable operation beyond 10 4 s • Optimal polarization window enables four-level multilevel storage and boosts synaptic recognition accuracy from 71.8% to 90.6% Perovskite quantum dots (PQDs) memristors exhibit pronounced ion migration activity owing to their soft lattice nature. However, the surface octahedral disorder induced by this structural flexibility often leads to stochastic ion migration, limiting device reliability. Herein, we employ the ligand polarization effect to suppress this stochastic ion migration through surface rigid confinement. By anchoring a strong-dipole ligand onto the quantum dot surface, the electrostatic coupling between the molecular dipole field and surface defects reconstructs the surface coordination environment and stiffens the octahedral framework, elevating the vacancy migration activation energy from 0.28 eV to 0.42 eV and effectively suppressing ion migration at the quantum dot surface. Through this strategy, the memristors demonstrate a two-order-of-magnitude increase in on/off ratio (from 10 1 to 10 3 ), over 70% reduction in operating voltage dispersion, cycling endurance exceeding 2 × 10 3 cycles, and retention beyond 10 4 s, while maintaining stable resistance states for over 60 days under ambient conditions. Tuning the ligand polarization strength reveals an optimal polarization window, enabling four-level multilevel storage and elevating synaptic recognition accuracy from 71.8% to 90.6%. This work provides an effective ligand polarization-based strategy for suppressing ion migration at its origin in perovskite quantum dot memristors. A ligand polarization-assisted surface rigid confinement strategy is developed for suppressing stochastic ion migration in CsPbBr 3 quantum dot-based memristors. The strong-dipole ligand anchors onto the quantum dot surface, driving surface atom rearrangement through electrostatic coupling and forming a rigid confinement layer that stabilizes conductive filaments. The resulting memristors achieve a two-order-of-magnitude enhancement in ON/OFF ratio and stable resistive switching. As artificial synapses, these devices demonstrate improved synaptic plasticity and a recognition accuracy of 90.6%, outperforming the control device (71.8%). Download: Download high-res image (145KB) Download: Download full-size image
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shuo Wang,Shimin Liu,Jingyi He,Jiangwei Liang,Tianlin Chen,Xuemei Fan,Shiqing Xu
Spectroscopic screening of Mn:CsPbX 3 (X = Cl, Br, I) nanocrystals embedded in a B–Si–Zn–Al glass matrix identifies CsPbCl 3 as a suitable sensitizing host for Mn 2+ emission because of its favorable energy-level alignment. However, achieving efficient Mn 2+ luminescence in CsPbCl 3 -based microcrystalline glass remains challenging due to the intrinsically weak spin-forbidden d–d excitation of Mn 2+ and the difficulty of precipitating CsPbCl 3 nanocrystals within a rigid glass network. In this work, Mn 2+ incorporation is proposed as an effective strategy to facilitate the local crystallization of CsPbCl 3 nanocrystals, as supported by HRTEM lattice-fringe observations, XPS analysis, and photoluminescence evolution. Combined with non-equilibrium kinetic control, rapid water quenching helps preserve a larger population of small and dispersed Mn:CsPbCl 3 luminescent units, thereby enhancing the macroscopic orange-red emission. The corresponding spectral behavior is consistent with host-mediated sensitization of Mn 2+ . Compared with thermodynamic annealing, which improves intrinsic radiative efficiency through structural relaxation and defect reduction, the water-quenched sample exhibits stronger steady-state photoluminescence despite a lower absolute quantum efficiency. This contrast indicates that the enhanced brightness mainly originates from the increased population of active sensitized Mn 2+ -emitting centers rather than from improved intrinsic efficiency of individual centers. These results suggest that coupling Mn 2+ -assisted local crystallization with non-equilibrium water-quenching control provides a feasible route for designing high-brightness orange-red luminescent microcrystalline glasses.
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Communications Physics
·
2026
·
IF 5.5
Yuan Yu,Song Feilong,Qian Chenjiang,Yang Longlong,Yang Jingnan,Shi Shushu,Yan Sai,Zhang Qinggang,Zuo Zhanchun,Zhang Qinghua,Wang Can,Li Liang,Jin Kuijuan,Gong Qihuang,Xu Xiulai
Quantum emitters having non-trivial spin polarizations are highly demanded for chiral quantum devices and quantum photonic technologies. Here we investigate the magneto photoluminescence spectroscopy of perovskite quantum dots encapsulated in silica and report an observation of chiral magneto optoelectronic responses. The encapsulation stabilizes the emission and also increases the lattice distortion that alters the exciton properties. As a result, asymmetric behaviors for the degree of circular polarization to the positive and negative magnetic fields are observed from both bright and dark states in the quantum dot. The magneto optoelectronic responses further demonstrate the state mixture between bright and dark excitons, which well explains the chiral features of the quantum dot. The chirality and magnetic field manipulation in the encapsulation environment pave the way to apply them in chiral quantum photonic devices with operational stability.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Mingyang Zhao,Zhisen Feng,Yupeng Jiao,Xiao Chen,Linjue Xiao,Tao Hong,Zhenfeng Tong
Cr-substituted hollandite ceramics are promising crystalline waste forms for immobilizing radioactive cesium, yet achieving high densification is challenging within temperature windows that mitigate Cs loss. Here, we develop a practical, sintering-aid-assisted reactive sintering route to densify Ba 0.667 Cs 0.667 Cr 2 Ti 6 O 16 at relatively low temperature and to identify the key factors controlling densification. Nine commonly used sintering aids were screened individually, and CuO was found to be uniquely effective. Guided by this screening, we correlate thermal behavior, crystallographic evolution, and microstructural development to clarify the role of CuO. Thermal analysis shows that CuO shifts BaCO 3 -related mass-loss/endothermic events to a lower temperature, indicating earlier BaCO 3 decarbonation and CO 2 release. Rietveld refinement of the X-ray diffraction data further reveals systematic crystallographic evolution, consistent with limited Cu substitution and associated defect-compensation effects that may enhance mass transport. These effects coincide with a marked change in grain-growth behavior, where anisotropic growth is suppressed, and grains become more equiaxed, improving packing efficiency and enabling grain-growth-controlled densification. The resulting increase in relative density is accompanied by significantly reduced Cs release, indicating improved chemical durability. Overall, this work establishes CuO-enabled reactive sintering as a practical low-temperature processing strategy for refractory Cr-hollandite waste forms and highlights grain-growth control as a key microstructural mechanism linking processing, densification, and durability.
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