JOURNAL OF MATERIALS SCIENCE
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2026
·
IF 3.9
Feng Min,Bai Zhongchen,Chen Qixin,Peng Xishun,Li Xinghua,Zhang Zhengping
In this study, we selected CsPbBr 3 quantum dots (QDs) as a modification layer of CsPbBr 3 /Carbon interface to facilitate their charge transfer for enhancing the photoelectronic conversion efficiency of ZnO/CsPbBr 3 /carbon solar cell. The results demonstrated that CsPbBr 3 QDs layer simultaneously improved film morphology, composition, and optoelectronic properties. This was achieved by filling pinholes, enlarging grain size, suppressing secondary phases, tuning elemental stoichiometry, enhancing electron transport, and reducing non-radiative recombination. The optimized device achieved an increase in PCE from 5.46% to 7.27%. This method and structure of solar cell we proposed in this paper provides a novel strategy for improving high-performance and high-stability PSCs.
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高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·294
·
IF 38.5
Yao Zhiwei,Liang Changsheng,Bi Chenghao,Zhou Wenyuan,Ren Ke,Deng Ming,Ding Shuo,Xiang Chaoyu
A new quantum dot (QD) films with negligible redshift of photoluminescence spectra after film fabrication from QD solution.
An electron barrier around QDs realized by adopting ligands with concentrated electron distribution.
Record external quantum efficiency of light-emitting diodes based on CsPbI 3 QDs (28.9% at 640 nm and 32.0% at 657 nm).
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Du Yuxiang,Xiu Yueyue,Yang Xin,Fu Rui,Liu Dan,Liu Lipeng,Sai Huazheng
Aerogels exhibit excellent properties owing to their nano-sized building blocks and unique structures. With increasing application demands, traditional nanoscale building blocks have limitations in further optimizing the performance of aerogels; therefore, the development of novel, high-performance building blocks has become an urgent challenge in the field. Sub-1 nm nanowires (SNWs) exhibit polymer-like properties that make them superior to nanoscale nanowires, and are well-suited as new building blocks for aerogels. In this study, we achieved precise control over the aggregation state of GdOOH SNWs (Gd–SNWs) in three-dimensional space by regulating the interactions between SNWs as well as between SNWs and solvents, thereby obtaining SNW aerogels (SNWAs) with low density ( ~ 0.024 g cm −3 ) and high specific surface area (505 m 2 g −1 ). After silanization, the superhydrophobic SNWAs exhibited excellent fatigue resistance (50 cycles with a set strain of 50%). This innovative approach enriches the types of aerogels building blocks and opens up new avenues for high-performance aerogels.
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Matter
·
2026
·
IF 15.7
Pengbo Ding,Pui Kei Ko,Mi Gu,Aleksandr A. Sergeev,Mohsen Tamtaji,Yichi Zhang,Yuling Huang,Hang Lyu,Hoi Lam Tammy Tsang,Dezhang Chen,Xihan Chen,Liang Guo,Kam Sing Wong,GuanHua Chen,Xiao Wei Sun,Jonathan E. Halpert
High-entropy alloying (HEA) has been shown to enhance stability and optoelectronic properties in various materials, including recent demonstrations in perovskite nanocrystals (PNCs). However, the use of HEA-PNCs outside traditional optoelectronics, specifically as single-photon sources (SPSs) for quantum information science, remains largely unexplored. Here, we demonstrate that HEA intrinsically improves the room temperature performance of PNC-based SPSs. By introducing multiple divalent cations at the Pb site, we create a high-entropy crystal lattice that facilitates exciton localization, enhancing radiative recombination while suppressing trap-assisted and phonon-mediated losses. Ab initio molecular dynamics simulations corroborate exciton localization and reveal that reduced electron-phonon coupling in HEA-PNCs diminishes exciton dephasing. Consequently, our HEA-PNCs exhibit a high single-photon emission purity of 96%, with nearly non-blinking emission at room temperature, marking the first intrinsic materials-based solution to achieve such performance. These results establish HEA as a robust design principle for next-generation room temperature PNC-based quantum emitters.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 7
·495
·
IF 3.2
Xie Yaochen,Liu Guangli,Wu Shiqi,Xu Zicong,Ye Jianheng,Qian Yannan
The development of deep-blue emitting perovskite quantum dots (PeQDs) has been significantly hindered by the surface defects and halide migration. To overcome these problems, a synergistic strategy combining strong quantum confinement and mixed-halide engineering was proposed to achieve highly efficient deep-blue emission. An excellent multidentate ligand 1-carboxymethyl-3-methylim-idazolium chloride (HOOCMIMCl) was introduced into CsPbBr 3 QDs, resulting in ultra-small monodisperse particles with an average diameter of 4.2 nm. The ultra-small CsPbBr 3 QDs exhibited deep-blue emission at 457 nm with a high photoluminescence quantum yield (PLQY) of 77%. Based on density functional theory (DFT) calculations and experimental results, HOOCMIMCl ligand also passivated uncoordinated Pb 2+ by C = O and reduced bromine vacancies (V Br ) through C = N in imidazole ring, improving the PLQY and stability of CsPbBr₃ QDs. It opens a new pathway for realizing highly efficient deep-blue emitting PeQDs with a tunable emission wavelength and offers a research basis for advancing high-performance PeLEDs in the deep-blue region.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Zeyi Wang,Linqi Chen,Jingzhou Li,Xuting Chen,Xinjie Li,Beier Zhou,Hongxing Dong,Long Zhang
Lead sulfide quantum dots (PbS QDs) offer significant potential for near-infrared (NIR) free-space optical communication (FSOC) due to tunable bandgaps and broad spectral response. However, their microsecond-scale photoluminescence (PL) lifetimes and pronounced Auger recombination critically limit modulation bandwidth and signal-to-noise ratios. Plasmonic nanostructures can address these limitations via the Purcell effect, but the involved lithographic fabrication compromises scalability and precise sub-wavelength structuring. This work presents a facile, lithography-free methodology for dense, vertically aligned gold nanorod (Au NR) arrays with strong localized surface plasmon resonance (LSPR) across the NIR. By combining seed-mediated synthesis of high-aspect-ratio Au NRs (>8) with precise solvent evaporation-induced self-assembly (EISA) on functionalized substrates, vertically oriented arrays are achieved. The integration of vertical and well-aligned Au NR arrays with PbS QD photoconversion layer induces a 769% peak PL intensity enhancement at resonance. Moreover, the Purcell effect from strong near-field confinement accelerates spontaneous emission, reducing the ensemble-average PL lifetime from 860 ns to 279 ns – a critical advance for bandwidth. Within a representative FSOC link employing intensity modulation, the optimized plasmon-enhanced PbS QD photoconversion material achieves a −3 dB bandwidth of 930 kHz and supports 2.0 Mbps on–off keying (OOK) with a bit error rate (BER) of 3.8 × 10⁻ 3 under ambient conditions. This demonstrates a promising improvement over baseline QD devices and validates the efficacy of the EISA-fabricated plasmonic array for high-speed NIR FSOC.
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Materials Today Chemistry
·
2026
·
IF 7.4
Aolin Li,Yi Ouyang,Huichao Zhang,Bo Huang,Bin Liu,Tsutomu Muranaka,Qingming Yang
Ion migration poses a critical impediment to perovskite commercialization by directly degrading device performance and stability, driving intense scientific scrutiny into suppression strategies. However, existing studies predominantly focus on crystal modifications while overlooking the role of substrates in contact with perovskite materials. Here, we select quartz, indium tin oxide (ITO), Ga:ZnO (GZO), ZnO, NiO x and Ag substrates to study light-induced ion migration kinetics in all-inorganic mixed-halide perovskite nanocrystals. ITO and GZO substrates can effectively suppress ion migration, indicating that these conductive substrates provide transfer channels for photogenerated charge carriers and thus weaken the local electric field caused by charge accumulation. Furthermore, electrons are inferred to be the dominant carriers in this process. While the ZnO nanoparticle substrate exhibits weak suppression, the NiO x nanoparticle substrate with hole conductivity shows a negligible effect, underscoring the critical role of electron transport. Surprisingly, the nanocrystals film on the Ag substrate exhibits an irreversible spectral shift, suggesting a possible photoinduced chemical reaction between Ag and iodide ions. Overall, substrates can regulate the ion migration behavior of perovskite nanocrystals, providing an alternative approach to improving perovskite device stability.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Longyun Liu,Xiaohui Li,Jiejun Ren,Liangjun Chen,Si Chen,Guoping Yan,Fan Liu,Jun Huang
Lead halide perovskite quantum dots (PQDs) exhibit outstanding optical properties, including high photoluminescence quantum yield, narrow emission bandwidth, and tunable emission wavelengths. However, structural instability and susceptibility to degradation in aqueous environments significantly limit their applicability in biological imaging systems. Therefore, the development of PQD-based imaging platforms with excellent optical performance and enhanced aqueous stability remains a critical challenge. Herein, a water-dispersible nanocomposite nanoimaging platform CsPbBr3–Fe3O4@SA@DSPE-mPEG (CPB–Fe@SA@DSPE) was successfully synthesized by employing stearic acid (SA) as a hydrophobic shell and amphiphilic molecule DSPE-mPEG as a hydrophilic layer, enabling dual-modal fluorescence and magnetic resonance imaging (MRI) for tumor diagnostics. This platform demonstrates remarkable water dispersibility and stability, retaining 42.8% of its initial fluorescence intensity after 37 days in an aqueous medium. In addition, it exhibits superparamagnetic behavior with a saturation magnetization of 0.96 emu/g. In vitro experiments further confirmed its dual-mode imaging capability in tumor models, underscoring its potential in precision diagnostics. Therefore, this study provides a promising strategy to overcome the intrinsic limitation of PQDs in biomedical imaging and broadens the scope of PQD-based applications.
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Materials Today Bio
·
2026
·
IF 11
Longqing Hu,Zhongyuan Yin,Songwei Tan,Yu Deng,Xincai Qu,Ting Hu,Qiong Wang
Triple-negative breast cancer (TNBC) derives only limited clinical benefit from radiotherapy (RT), partly due to abnormalities in the tumor microenvironment and dysregulated signaling pathways. By integrating TNBC cases from the METABRIC and TCGA cohorts, we implemented an analysis framework centered on RT-by-gene interaction terms, implicating TNF-α–NF-κB signaling and inflammatory response as potential effect modifiers of RT benefit. Based on a pathway-guided polyphenol–gene interaction screen, curcumin (Cur) was prioritized as a modulator of TNF-α–NF-κB/inflammation-related programs. We then engineered a multifunctional nanoplatform (TCC) that couples catalytic modulation of the tumor microenvironment with suppression of adaptive pro-survival programs. TCC was built on pH-responsive nanoceria (CeO 2 nanozymes) to modulate redox homeostasis and alleviate hypoxia, loaded with Cur, and coated with D-α-tocopherol polyethylene glycol succinate (TPGS) to improve stability and cellular uptake; cRGD was further introduced to generate cRGD-TCC for enhanced tumor targeting. In vitro and in vivo, TCC promoted G 2 /M-phase arrest, amplified RT-induced reactive oxygen species generation and DNA damage, and attenuated TNF-α–NF-κB/inflammatory programs and markers of inflammation, survival, and invasion. Collectively, TCC provides an integrated radiosensitization strategy that addresses microenvironmental barriers and adaptive tumor signaling, thereby potentially enhancing RT response in TNBC.
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PubMed
高影响因子
Communications Materials
·
2026
·
IF 9.1
Zhang Yuan,Pan Yong,Wu Lijie,Cao Jianguo,Su Xueqiong,Xu Jie,Xie Haixia,Gao Dongwen
This paper presents a method for enhancing the environmental stability of all-inorganic perovskite quantum dots (CsPbBr₃) through ligand engineering. To address the challenge of insufficient stability when directly exposed to the natural environment, the study employed trioctylphosphine, lead stearate, and chlorobenzene as solvents. The results indicate that the modified quantum dots exhibited self-healing behavior after 30 days of exposure to corrosive solutions used in LED fabrication processes, with a significant recovery in photoluminescence intensity. Compared to CsPbBr₃, the intensity increased by 29-fold, 104-fold, 250-fold, and 65-fold after exposure to water, ZnO, TiO₂, and Poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) solutions, respectively. Additionally, their luminescence intensity at 100 °C increased by 116%. Stability tests under various natural atmospheric conditions confirmed that the time to complete failure reached 1900 h, 5950 h, approximately 3 years, and approximately 24.5 years in humid-hot, forest, laboratory, and low-temperature environments, respectively. These self-healing quantum dots provide valuable insights for quantum dot stability research and the outdoor application of devices.
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Advanced Optical Materials
·
2026
·Vol. 14
·期 34
·e71656
·
IF 7.2
Ke Wang,Ziyang Zhao,Aidi Zhang,Jicun Ren
InP quantum dots (QDs) are promising for next-generation displays due to their superior color purity, high quantum yield, tunable emission, and non-toxicity. However, their practical application is limited by instability under heat, oxygen, and intense illumination. To address this critical issue of stability, we proposed a dual-layer encapsulation strategy. Firstly, InP/ZnSe/ZnS QDs are synthesized via a “one-pot” approach. Then, mZIF-8@QDs materials are prepared by embedding QDs into a mesoporous zeolite imidazolate framework (mZIF) formed after pore structure modification and surface modification. Finally, a novel vacuum-assisted deposition method is employed to uniformly polymerize polymethyl methacrylate (PMMA) on the surface of mZIF-8@QDs, thereby achieving a secondary coating and obtaining the mZIF-8@QDs@PMMA composite material. The QDs loading capacity was significantly enhanced by modification of the saturated fatty acid for mesoZIF-8. The synthesized fluorescent composite material exhibits high quantum yield, long fluorescence lifetime, good photostability and thermostability. Furthermore, this composite material is used as a color conversion layer in liquid crystal displays (LCDs). The experimental results indicate that the composite material has exceptional durability, and retains over 95% of its initial luminance after 1000 h of accelerated aging under continuous high-temperature and high-intensity blue light irradiation.
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高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Wanling Mao,Siyong Wang,Li Zhang,Yujia Luo,Yuyao Feng,Yunhai Xiong,Yixuan He,Yuhui Dong,Yousheng Zou,Haibo Zeng
Low-toxicity quantum dots (QDs) based on group I-III-VI elements have attracted significant interest due to their color-tunability for wide-gamut displays. Nevertheless, the width of the blue-emitting peak remains considerably broader than those of the green and red counterparts, resulting in degraded color purity, restricted gamut coverage, and diminished energy efficiency in blue-emitting devices. Here, we report spectroscopically pure blue QDs (λ = 465 nm) with an ultranarrow FWHM of 36 nm, achieving excellent color purity for blue-emitting I-III-VI QDs. Employing a two-step hot-injection method with precise thickness control, this approach enables epitaxial growth of an atomically thin 0.35 nm thick AgGaS 2 (AGS) shell on Ag-In-Zn-Ga-S cores. Using in situ HRTEM on systematically synthesized AIZGS@AGS architectures, we directly captured the controlled epitaxial growth of this shell, revealing a clean core–shell interface. The high-crystallinity AGS shell passivates surface defects, narrowing the PL spectrum from 103 to 36 nm. Moreover, systematic In:Zn ratio tuning further affords AIZGS@AGS QDs that exhibit narrow linewidths and continuous spectral coverage across the blue region (465–509 nm). Our study provides an effective approach for high-quality I-III-VI blue QDs, demonstrating significant potential for advanced display applications.
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