Advanced Optical Materials
·
2026
·
IF 7.2
Chengyang Liang,Lin Zhang,Delin Kong,Mengqi Zhang,Zhitao Xue,Jianjun Tian
The elimination of redundant surface organic ligands on perovskite quantum dots (PQDs) is a critical procedure for the construction of high-efficiency light-emitting diodes (LEDs). Nevertheless, such ligand removal readily induces undesirable phase transition owing to the intrinsically unstable surface configuration of PQDs, which severely hinders the large-scale manufacturing of high-performance LEDs. Herein, we develop tetrabutylammonium hexafluorophosphate (TBAPF 6 ) surface reconstruction of CsPbI 3 PQDs during di-isooctylphosphinic acid (DSPA) assisted synthesis and purification. The short chain DSPA has strong coordination with PQDs, while TBA + ions are compensated for Cs + surface vacancies, and PF 6 − ions combine onto Pb 2+ sites to stabilize the structure through filling I − vacancies. This strategy substantially suppressed phase transformation during synthesis and purification, thereby enhancing the moisture and oxygen stability of the PQDs to extend the processing window of device fabrication. LEDs fabricated using freshly stored PQD within 7 days showed negligible efficiency degradation, yielding a peak external quantum efficiency (EQE) over 25%. Notably, even after long-term storage for 30 days, the assembled LEDs still achieved a high EQE of more than 22%. Accordingly, this strategy provides a viable pathway for the scalable preparation of wide-processing-window LEDs.
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ACS Nano
·
2026
·Vol. 20
·期 34
·23716-23728
·
IF 17.3
Zeng Qing,Tamtaji Mohsen,Zhou Rui,Zhou Tao,Guo Zhengxiao,Chen GuanHua,Tse Edmund C. M.
Electrocatalytic oxidation of glycerol toward high-value
C3 products
on Pd-based catalysts presents a promising strategy for upgrading
and converting glycerol. However, C3 intermediates often adsorb too
tightly on Pd-based catalyst surfaces during glycerol oxidation, leading
to C–C bond cleavage. Herein, cubic-shaped PdBi nanoparticles
with tunable Ni doping levels are successfully synthesized through
a one-step solvothermal method. Owing to the downshift of d-band center
originating from the introduction of Bi and Ni as well as the cubic
shape, the PdBiNi ternary nanocubes (NCs) exhibit excellent electrocatalytic
performance for the glycerol oxidation reaction (GOR). Specifically,
Pd 83 Bi 12 Ni 5 NCs with the lowest d-band
center exhibit a specific activity of 61.12 mA cm geo –2 and a mass activity of 5.34 A mg Pd –1 . Notably, the Faradaic efficiency (FE) toward C3
products exceeds 97%. In situ Fourier transform infrared spectroscopy
and density functional theory calculations show that key C3 intermediates
are easily desorbed from the catalyst surface, thereby suppressing
C–C bond cleavage and thus preventing overoxidation into low-value
products. In addition, Pd 83 Bi 12 Ni 5 NCs possess long-term durability over the course of 16 cycles (1
h/cycle) with an FE for C3 products between 92.5% and 97.6% upon scale-up
deployment in a flow electrolyzer, validating its feasibility in practical
operations.
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ACS Catalysis
·
2026
·Vol. 16
·期 17
·17145-17155
·
IF 13.6
He Ye,Liu Huiyu,Sheng Jianping,Du Chenyu,Moghadam Majid,Sun Yanjuan,Dong Fan
Halide perovskite nanocrystals are promising photocatalysts for CO 2 reduction due to their strong light absorption, defect tolerance, and tunable excited-state properties, but their practical performance remains limited by tightly bound excitons, rapid charge recombination, and inefficient interfacial electron delivery. Here, we report an anthraquinone (AQ)-modified CsPbBr 3 nanocrystal photocatalyst (CPB/AQ) in which the redox-active π-conjugated AQ ligand functions as an interfacial electron relay and molecular electric-field modulator. Experimental and theoretical analyses collectively reveal that AQ creates an additional interfacial charge-transfer pathway, strengthens the light-induced surface potential difference from 170 to 270 mV, and decreases the exciton binding energy from 44.05 to 40.74 meV. Consequently, CPB/AQ achieves a CO yield of 433.50 μmol g –1 within 3 h under AM 1.5G irradiation, 4.54 times that of pristine CPB, and maintains stable CO evolution during a 25 h test. Isotopic 13 CO 2 tracing verifies that CO originates from CO 2 reduction, while in situ FTIR spectroscopy demonstrates enhanced CO 2 adsorption/activation and accelerated formation of *COOH and *CO intermediates on CPB/AQ. This work highlights molecularly gated interfacial electric-field regulation as an effective strategy for overcoming charge-transfer bottlenecks in perovskite nanocrystal photocatalysis.
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BMEMat
·
2025
·
IF 15.5
Wenkui Mo,Zeyu Liang,Bo Zhang,Lin Xiao,Xun Liu,Zhigao Yi,Shangzhi Xie,Qiyue Wang,Liang Shi,Taobo Luo,Feng Li,Leilei Wu,Yuanzhe Piao,Fangyuan Li,Jian Zeng,Daishun Ling
Early, non-invasive detection of esophageal cancer at sub-millimeter resolution is critical for tailoring precise therapeutic strategies. While ultra-high-field (UHF) magnetic resonance imaging (MRI) offers exceptional spatial resolution, the lack of optimized contrast agents capable of enhancing sensitivity for detecting microscopic tumors remains a significant challenge. Here, we report a cyclo-RGD peptide-conjugated antiferromagnetic nanoparticle (RANP) as a novel targeted T 1 contrast agent, specifically designed to improve in vivo imaging of esophageal tumors at the micrometer scale. The RANP integrates an antiferromagnetic core with low magnetization, minimizing T 2 decaying effects, while the cyclo-RGD peptide enhances its targeting ability by specifically binding to integrin α v β 3 , a biomarker highly expressed on tumor vasculature. This targeted conjugation improves the probe's selective accumulation at the tumor site and facilitates superior T 1 relaxation of water protons. Under 9 T MRI conditions, the RANP exhibits an r 1 value of 1.88 mM −1 s −1 and a low r 2/ r 1 ratio of 1.84, enabling the detection of primary esophageal tumors as small as 0.8 mm. This study significantly advances the sensitivity of current imaging techniques, pushing the detection limit of in vivo esophageal cancer diagnosis into the sub-millimeter range. Our results demonstrate the promising potential of RANP-enhanced UHF MRI for early detection, monitoring, and therapeutic intervention in esophageal cancer, offering a powerful tool for more effective clinical management.
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Advanced Optical Materials
·
2025
·
IF 7.2
Jiale Chao,Boyang Deng,Chuanxue Huang,Wenhao Lyu,Zhihong Sun,Jingjing Guo,Yuzheng Guo,Bo Fu,Haichang Lu,Wei Zhou
Metallic nanomaterials serve as compact integrated modulators in ultrafast multiwavelength photonics. Engineered bimetallic alloy nanoparticles exhibit enhanced and tunable optical properties that surpass those of single-component systems by alloying. Here, bimetallic PtNi octahedral alloy nanoparticles are demonstrated as a promising material platform for ultrafast multiwavelength lasers, exhibiting exceptional nonlinear optical responses across the entire near-infrared spectrum. Q-switched laser operations were successfully achieved at 1028.5, 1561.2, and 1911.2 nm, utilizing PtNi octahedral alloy nanoparticles. Furthermore, utilizing the four-wave mixing effect induced by PtNi alloys, simultaneous five-wavelength lasers were realized with channel spacings of 1.7 and 2.2 nm in the 1- and 2-µm bands, respectively. It is found that PtNi alloys are comparable nonlinear optical modulators with other typical nanomaterials in ultrafast multiwavelength photonics. Moreover, first-principles calculations reveal that substantial 3D states of the Ni concentrated near the Fermi level are the major cause of the enhanced optical absorption, where the surface Ni plays an important role. This work establishes a novel paradigm for developing advanced material platforms for nonlinear optical modulation, paving the way toward breakthroughs in ultrafast multiwavelength photonic systems.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Dong Han,Yulu Hua,Shuo Li,Changhao Li,Wenxu Yin,Xiaoyu Zhang
To optimize charge carrier injection and reduce interfacial losses in perovskite light-emitting diodes (PeLEDs), we introduced a thin interfacial layer of CsPbCl3 quantum dots (QDs) between the red quasi-two-dimensional (PEA5NMA5)0.2CsPb2I7 emitting layer and the electron transport layer (ETL). This interlayer markedly enhances the device performance, which we attribute to multiple synergistic effects. First, the structural compatibility between CsPbCl3 QDs and emitters enables a seamless interface, improving film morphology and interfacial contact. Second, the CsPbCl3 QDs serve as a passivation layer that mitigates surface trap states and suppresses iodine ions diffusion and halide vacancy-induced nonradiative recombination in emitter. Additionally, the wide bandgap and suitable conduction band position of CsPbCl3 QDs create a favorable energy-level cascade, facilitating efficient electron injection from ETL into the emitting layer while simultaneously blocking holes. These combined effects result in enhanced electroluminescence efficiency and improved operational stability. As a result, pure red PeLEDs achieve an impressive external quantum efficiency of 23.7% as well as a 15-fold increase in operational life.
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COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Jing Li,Yu Zhang,Hui Wei,Tao Ma,Fanfan Liu,Feng Hu,Wei Xu,Zhiyu Tao,Simin Xia,Qiang Cui,Nannan Wang,Hehe Wei
Developing electrocatalysts with ultrahigh activity and industrial-grade durability is critical for advancing green hydrogen production. This study develops a facile oil-phase method to synthesize PtPdRuNiMo HEA nanoparticles that are simultaneously nucleated, alloyed and immobilized on one-dimensional carbon nanotubes (CNTs). The unique 0D/1D architecture simultaneously prevents nanoparticle aggregation and maximizes active site exposure, while the CNT network enhances charge/mass transfer. The optimized catalyst delivers record-low overpotentials of 6.7 mV (10 mA cm −2 ) and 202.0 mV (800 mA cm −2 ) in alkaline media, with exceptional stability exceeding 500 h. Density functional theory calculations reveal that the multi-metallic synergy in PtPdRuNiMo optimally tunes the electronic structure, accelerating both water dissociation and hydrogen adsorption kinetics. This work establishes new standards for designing next-generation electrocatalysts that combine atomic-level precision with industrial-scale performance, representing a significant leap forward in sustainable hydrogen production technologies.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Zhuolu Li,Yi Wu,Zhangwei Guo,Jiaxin Rui,Zhaogang Teng,Song Wang,Kai Pan
Double perovskite materials are promising lead-free alternatives due to their low toxicity and high stability. However, their large indirect bandgap limits optical performance. Morphology control offers an effective enhancement strategy. Here, cesium oleate (Cs-OA) and bromotrimethylsilane (TMS-Br) were injected into an oleic acid-free precursor. The OA present reacts with oleylamine (OAm) to form oleylammonium oleate (OAmH+·OA–), which, synergistically with OAm, enhances Ag+ and Bi3+ solubility. TMS-Br then provides bromide, triggering rapid nucleation of Cs2AgBiBr6 nanoclusters. Under thermodynamic control, these grow into uniform nanocrystals. Over time, multiple nanowires self-assemble and fuse into one-dimensional structures. Time-resolved photoluminescence shows a prolonged exciton lifetime of 19.0 ns, indicating low defect density. Temperature-dependent PL confirms a large exciton binding energy (61.1 meV), weak nonradiative recombination, and strong luminescence potential. The nanowires also exhibit excellent stability, retaining over 90% of their PL intensity after 90 days at room temperature.
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PROGRESS IN SOLID STATE CHEMISTRY
·
2026
·
IF 9.7
Mengping Wang,Shiyu Wang,Xinxin Liu,Zhenyi Yu,Guangjiu Zhao
Green antisolvents and ligands synergistically direct perovskite phase evolution. • Spectroscopic analyses reveal solvent-dependent ligand dissociation mechanisms. • Distinct phases enable antibacterial and dynamic anti-counterfeiting applications. In this work, we propose a ligand–antisolvent synergistic regulation strategy to synthesize Cs–Pb–Br materials with dual antibacterial and encryption functions. An amphiphilic ligand derived from 5-bromovaleric acid (5-BVA) and oleamide (OAm) is employed with two green antisolvents (water and ethanol). The use of water as an antisolvent yields high-purity CsPbBr 3 quantum dots (QDs) with water stability exceeding 50 days. These QDs exhibit potent antibacterial activity through electrostatic interactions with bacterial cell membranes achieving up to 99.8% inhibition at a low concentration of 120 μg/ml. In contrast, ethanol as the antisolvent leads to a mixed CsPbBr 3 /CsPb 2 Br 5 phase. This mixed phase exhibits water-triggered fluorescence activation originating from CsPbBr 3 recrystallization alongside a thermal quenching effect that enables reversible on–off fluorescence switching upon cooling–heating cycles. This water-induced fluorescence activation effect combined with reversible thermal quenching properties enables multi-level encryption. Ultimately this ligand-antisolvent synergistic regulation strategy not only offers theoretical guidance for the rational and tailored design of multifunctional perovskites but also establishes a foundation for their practical applications in complex optoelectronic and biological environments.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
C.C. Wang,Y. Zhu,Y.M. Hu,M.R. Dong,J.K. Liu
In this paper, Ag 8 SnS 6 powder was synthesized by the one-pot method, then prepared into Ag 8 SnS 6 and Selenization treated Ag 8 SnS x Se 6-x thin films. The effects brought by the amounts of added Se powder during the annealing process on the product phases, structures, and morphologies are characterized, and the electrochemical property and the cell efficiency as assembled into the counter electrode (CEs) for dye-sensitized solar cells (DSSCs) were investigated. It showed Se into the Ag 8 SnS 6 lattice occupied the site of S to transform into Ag 8 SnS x Se 6-x . And the thin film also became unflatten since the particles became larger after Se doping. The cell efficiency of Ag 8 SnS x Se 6-x CEs reached 4.26%, which was increased by 28.31% compared to that of Ag 8 SnS 6 CEs. Ag 8 SnS x Se 6-x CEs performed lower charge transfer resistance (Rct) and (△EPP), and an increased△E value between the conduction band level of CEs and the redox potential of electrolyte. After 10 cycles, the almost unchanged cathode/anode current density implied the Ag 8 SnS x Se 6-x CEs received good structure stability. Selenization treatment was able to facilitate electron transport and enhance the electrocatalytic activity, and as expected to be a promising method in improving the performance of the DSSCs.
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JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Min Ye,Fangyuan Lin,Lingou Yang,Jingwen Jin,Xuelian Liu,Yiru Wang,Xi Chen
In this study, a kind of lead-free Cu(I) halide perovskites , Cs 3 Cu 2 I 5 , is synthesized and applied for temperature sensing. A composite thin film combining Cs 3 Cu 2 I 5 with polymethyl methacrylate (PMMA) is developed for optical temperature sensing under different environmental conditions. The Cs 3 Cu 2 I 5 -PMMA films immersed in aqueous solutions exhibit stable sensing ability for at least 24 h, and show fully reversible sensing responses for the temperature change in the range from 30 °C to 80 °C with a temperature sensitivity up to 2.3% K −1 . The sensing performance and stability of the Cs 3 Cu 2 I 5 -PMMA film show that it can be a type of temperature sensing materials with great potential. This work opens up a new use of lead-free copper-based halide perovskites and provides a new temperature sensing material.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Haobing Zhao,Hailong Hu,Jinping Zheng,Yuan Qie,Kuibao Yu,Yangbin Zhu,Zhiqi Luo,Lihua Lin,Kaiyu Yang,Tailiang Guo,Fushan Li
With tunable emission in the full visible region, the ecofriendly InP quantum dots (QDs) show unique application prospects in light-emitting devices. At present, InP QDs suffer from wide-bandwidth emission, especially for electroluminescence (EL), which hinders their applications in high-performance display devices. Here, we report a facile one-pot synthesis of narrow-bandwidth InP/ZnSeS/ZnS QDs using a safe phosphorus source of tris(dimethylamino)phosphine, in which the ZnSeS inner-shell layer is formed via temperature-gradient solution growth from 240 to 280 °C. The synthesized green QDs have a high photoluminescence quantum yield (PLQY) of 91% and full width at half-maximum (fwhm) of 36 nm. Moreover, the resultant quantum dot light-emitting devices (QLEDs) also show a narrow fwhm of 42 nm, which is the narrowest emission of green InP QLEDs based on a safe phosphorus source reported so far. Further modulation of the electron injection into the device by inserting a thin layer of lithium fluoride results in a peak external quantum efficiency of 5.56%.
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