ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Wang Lei,Shao Meiyu,Wang Huizhi,Han Chunlei,Ma Nan,Qu Wei,Liu Jun,Lin Xiangyun,Jiang Mai,Xu Xiangmei,Meng Fangang,Tang Yan,Zhang Wei
Neural electrodes capable of precise interrogation and biofunctional regulation—encompassing both long-term electrophysiological signal recording and tunable control of neuronal or pathological cell behavior via surface biofunctionalization—hold significant promise for advancing the diagnosis and treatment of neurological disorders. A critical challenge lies in mitigating the immune-mediated foreign body response, which often leads to glial scar formation that encapsulates implants like “cement,” severely compromising functionality. To address this, we develop a benzyloxycarbonyl (Cbz)-substituted poly(ornithine-alt-glycine) (OG Cbz ) interface, which inherently resists biofouling and immunogenic rejection without degrading electrical performance. Notably, substituting the Cbz group with various functional moieties not only maintains these excellent antifouling and biocompatibility properties but also imparts corresponding functionalities. As a proof-of-concept, replacing Cbz with the peptide sequence IKVAV and the antibody cetuximab successfully endows the interface with neuron-affinity and tumor cell proliferation inhibition, while retaining its inherent antifouling and anti-foreign-body reaction properties. During a six-month in vivo implantation period, the IKVAV-functionalized electrodes exhibit a significantly enhanced operational lifetime with improved electrophysiological signal fidelity. This work presents a reliable and versatile interfacial strategy for developing durable and multifunctional neural interfaces.
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高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Lili Gao,Ping Hu,Yingzhen Hu,Yingjie Hu,Jing Zhang
Here, the crystal synthesis, crystal structures, optical band gaps and application in devices of (C 4 N 2 H 6 )PbI 3 and (C 4 N 2 H 6 )PbBr 3 are researched and discussed. Novel hybrid 1D perovskite single crystals based on pyrazine were obtained by reacting the organic cation C 4 N 2 H 6 with lead iodide and bromide. The band gaps of (C 4 N 2 H 6 )PbI 3 and (C 4 N 2 H 6 )PbBr 3 compounds are 2.71 and 2.82 eV, respectively, which consistent with the structure distortion. The 1D crystals of (Py)PbI 3 and (Py)PbBr 3 assisted the device efficiency from 20.15% to 22.12 and 22.38%, respectively.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Ji'an Song,Yan Gao,Zhichao Meng,Zelong Jiang,Xiaobing Cao,Qingguang Zeng,Tao Hu
All-inorganic metal halide perovskites have attracted extensively attentions because of superior optoelectronic properties. Presently, tremendous progress is reached in green and red emitting perovskites , while the explorations of blue emitting perovskites are lag behind, and it also faces low emission efficiency and long-term stability issues. In this work, nickel-bromide passivation strategy was proposed to improve optical properties and chemical stability of blue emitting CsPbBr 3 nanoplatelets (NPLs) with strong quantum-confinement effects. As a result of the repaired Br − vacancy on the surface of the NPLs and enhanced structural stability of CsPbBr 3 lattice by Ni 2+ doping, the emission efficiency of the NPLs is increased from 33.2% to 78%, and it can be stored up to 30 days without significant PL loss. Benefiting from the excellent overall performance, a liquid-type monochrome LED device fabricated by using the passivated CsPbBr 3 NPLs as blue color convector exhibits no emission saturation even the driving current reaches as high level as 190 mA. This work paves a new way for fabricating high-quality blue emitting NPLs with extraordinary properties.
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Inorganics
·
2023
·Vol. 11
·期 4
·168
·
IF 2.9
Chongzhu Hu,Zhuangzhuang Zhang,Jun Chen,Peng Gao
Organic-inorganic hybrid perovskites are highly efficient in photovoltaic applications, making the commercialization of perovskite solar cells (PSCs) possible. However, the high density of defects on the surface significantly affects the performance of PSCs. To address this issue, we have demonstrated a facile post-treatment strategy utilizing methylhydrazine iodide (MHyI) to passivate the surface of the perovskite film. MHyI could co-ordinate with the dangling bonds on the surface of perovskite films, effectively passivating defects in the film and suppressing carrier non-radiative recombination. As a result, PSCs with MHyI modification exhibit a champion power conversion efficiency (PCE) of 23.19% and a high open-circuit voltage (VOC) of 1.14 V (0.43 V voltage deficit). Moreover, unencapsulated solar cells maintain their initial efficiency of 88% after 30 days of exposure to ambient air with 30% humidity, and the devices with encapsulation retained 57% of their initial efficiency after 200 h of maximum power point (MPP) loading under constant light irradiation in ambient air. Overall, our results provide a facile method for improving the performance and stability of PSCs.Keywords:post-treatment;surface defect passivation;methylhydrazine iodide;high performance;perovskite solar cell
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Fengling Wang,Sen Jin,Yaqiong Du,Qixun Xia,Libo Wang,Aiguo Zhou
Mo 2 C T x is a novel co-catalyst to enhance the photocatalytic performance of CdS for H 2 production. The surface of Mo 2 C T x is usually terminated by fluorine anion because it is generally made by the etching of fluoride-containing solution. Here we report, a novel method to prepare highly pure MXene with Br termination by the etching of pure HBr at 220 °C for 3 d, or the HBr solution mixed with LiBr, NaBr, KBr or NH 4 Br at 180 °C for 24 h. The pure HBr etching needs higher temperature and longer time to make pure Mo 2 C T x , however, which result lager interlayer space and more active sites. All the Mo 2 C T x samples show high co-catalytic performance to enhance the photocatalytic performance of CdS for H 2 production. The H 2 production rate of CdS combined with HBr etched sample was 17,566 μmol g −1 h −1 , similar with the sampled combined with traditionally HF etched sample. This is the first report to prepare MXene by etching of Br containing solution. The Mo 2 C T x made by this method is terminated by Br/O without F, and show excellent co-catalytic properties.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Fan Chen,Xiao-Jun Wang,Xuehu Zhang,Changhua Zhang
Compositional tune and doping/alloying routes have become the research focus for tailoring optical features of lead-free metal halide double perovskites to advance the development of solid-state lighting and display applications. Cs 2 NaInCl 6 double perovskite is receiving tremendous attention owing to its excellent optical properties . In this paper, we have successfully obtained the lead-free Cs 2 NaInCl 6-x Br x :Sb 3+ perovskites using the hydrothermal method . Via the substitution of bromine ions for chloride ions in Cs 2 NaInCl 6 :Sb 3+ , a tunable emission from 445 nm to 480 nm was realized. The X-ray diffraction, scanning electron microscope , UV–vis absorption spectra , PL spectra, TRPL spectra, air stability and thermal stability were investigated in detail. The sample shows an admirable air stability and excellent thermal stability. The results demonstrate that the cyan-emitting Cs 2 NaInCl 6-x Br x :Sb 3+ perovskites can be applied to white LEDs, especially for the full-spectrum LED illumination.
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ADVANCED MATERIALS
·
2023
·Vol. 35
·期 25
·2209452
·
IF 29.4
Pei Li,Wei Cheng,Yifan Zhou,Dong Zhao,Jun Liu,Lingxi Li,Xiaoping Ouyang,Bo Liu,Wenbao Jia,Qiang Xu,Kostya (Ken) Ostrikov
State-of-the-art thermal neutron scintillation detectors rely on rare isotopes for neutron capture, lack stability and scalability of solid-state scintillation devices, and poorly discriminate between the neutron and gamma rays. The boron nitride (BN)-CsPbBr 3 perovskite nanocomposite aerogel scintillator enables discriminative detection of thermal neutrons, features the largest known size (9 cm across), the lowest density (0.17 g cm −3 ) among the existing scintillation materials, high BN (50%) perovskite (1%) contents, high optical transparency (85%), and excellent radiation stability. The new detection mechanism relies on thermal neutron capture by 10 B and effective energy transfer from the charged particles to visible-range scintillation photons between the densely packed BN and CsPbBr 3 nanocrystals. Low density minimizes the gamma ray response. The neutrons and gamma rays are discriminated by complete decoupling of the respective single pulses in time and intensity. These outcomes open new avenues for neutron detection in resource exploration, clean energy, environmental, aerospace, and homeland security applications.
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Small
·
2023
·Vol. 19
·期 27
·2207915
·
IF 13.3
Jinchen Zhou,Daofu Wu,Changqing Tian,Zhiyu Liang,Hongmei Ran,Bo Gao,Zhongtao Luo,Qiang Huang,Xiaosheng Tang
Lead halide perovskite materials have great potential for photocatalytic reaction due to their low fabrication cost, unique optical absorption coefficient, and suitable band structures. However, the main problems are the toxicity and instability of the lead halide perovskite materials. Therefore, a facile synthetic method is used to prepare lead-free environmentally friendly Cs 2 TiX 6 (X = Cl, Cl 0.5 Br 0.5 , Br) perovskite materials. Their structural and optical characteristics are systematically investigated. The band gaps of the produced samples are illustrated to be from 1.87 to 2.73 eV. Moreover, these materials can keep high stability in harsh environments such as illumination and heating, and the Cs 2 Ti(Cl 0.5 Br 0.5 ) 6 microcrystals demonstrate the yields of 176 µmol g −1 for CO and 78.9 µmol g −1 for CH 4 after light irradiation for 3 h, which is of the first report of Ti-based perovskite photocatalysts. This finding demonstrates that the Ti-based perovskites will create opportunities for photocatalytic applications, which may offer a new idea to construct low-cost, eco-friendly, and bio-friendly photocatalysts.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 14
·4946-4952
·
IF 6.4
Tong Tong,Chang Liu,Jing Xu,Huihua Min,Su Chen,Yinong Lyu,Chongguang Lyu
Resistive random-access memories (ReRAMs) are considered as promising candidates for novel information storage techniques owing to their fast operation speed, simple structure and high integration density. Halide perovskites, with fast ion migration and facile fabrication, have been widely investigated as active layers for nonvolatile ReRAM devices. However, the ambient instability and toxicity of lead halide perovskites limit their further commercial application. In this work, for the first time, we report the ReRAM devices based on environmentally friendly and air-stable lead-free double perovskite Cs2AgEuBr6. We used a facile solution process method and vacuum sublimation to obtain Cs2AgEuBr6 crystals and fabricated a memory device based on high quality Cs2AgEuBr6 films. The memory device of the Au/Cs2AgEuBr6/ITO structure was designed in a cross-bar array architecture with the aim of simple operation and high integration. The resistive memory devices exhibited robust and reproducible bipolar switching behavior with a large ON/OFF ratio up to 104 and long retention time of 12 000 s. This study will inspire the further design of nonvolatile memory devices and other electronics using the novel lead-free halide perovskite.
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CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Dongying Fu,Wenjuan Jia,Shichao Wu,Junli Chang,Zhuo Chen,Junhua Luo
Two-dimensional (2D) Dion–Jacobson (DJ) hybrid perovskites (HPs) are widely used in the photodetection field due to their high stability and excellent carrier transport performance. However, current photodetectors based on DJ HPs can work only in the ultraviolet and visible wavebands, which limits their application in near-infrared (NIR) photodetection. Herein, for the first time, ultraviolet–visible–NIR photodetection is realized in the bulk single crystal of 2D bilayered DJ HP (3AMPY)(EA)Pb2Br7 (3AMPY = 3-(aminomethyl)pyridinium, EA = ethylamine). Structurally, the introduction of aromatic diammonium makes (3AMPY)(EA)Pb2Br7 have a shorter layer spacing (3.561 Å) and a more rigid structure. In addition, benefiting from the strong quantum and dielectric confinements of 2D HPs, (3AMPY)(EA)Pb2Br7 shows an excellent two-photon absorption (TPA) coefficient of up to 61.1 cm/MW under the excitation of an 800 nm femtosecond laser. Notably, (3AMPY)(EA)Pb2Br7 exhibits efficient photodetection from ultraviolet (377 nm) and visible (405 nm) to NIR (800 nm) wavebands, with on/off ratios of current higher than 103.
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Nano Research
·
2023
·Vol. 16
·期 7
·9344-9351
·
IF 9.9
Zeng Zhichao,Shi Xiaomeng,Sun Mingzi,Zhang Hongtu,Luo Wei,Huang Yunhui,Huang Bolong,Du Yaping,Yan Chun-Hua
Rare-earth (RE) halide solid electrolytes (HSEs) have been an emerging research area due to their good electrochemical and mechanical properties for all-solid-state lithium batteries (ASSBs). However, only very limited types of HSEs have been reported with high performance. In this work, tens of grams of RE-HSE Li 3 TbBr 6 (LTbB) was synthesized by a vacuum evaporation-assisted method. The as-prepared LTbB displays a high ionic conductivity of 1.7 mS·cm −1 , a wide electrochemical window, and good formability. Accordingly, the assembled solid lithium-tellurium (Li-Te) battery based on the LTbB HSE exhibits excellent cycling stability up to 600 cycles, which is superior to most previous reports. The processes and the chemicals during the discharge/charge of Li-Te batteries have been studied by various in situ and ex situ characterizations. Theoretical calculations have demonstrated the dominant conductivity contributions of the direct [octahedral]-[octahedral] ([Oct]–[Oct]) pathway for Li ion migrations in the electrolyte. The Tb sites guarantee efficient electron transfer while the Li 2s orbitals are not affected during migration, leading to a low activation barrier. Therefore, this successful fabrication and application of LTbB have offered a highly competitive solution for solid electrolytes in ASSBs, indicating the great potential of RE-based HSEs in energy devices.
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JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Fan Chen,Xiao-Jun Wang,Xuehu Zhang,Changhua Zhang
Lead-free halide perovskites have recently evoked considerable interest in illumination and display, due to their intriguing optical properties . Herein, we present an efficient and facile strategy to prepare Cs 2 InCl 5-x Br x ·H 2 O (x = 0–5) perovskites . The preparation was performed at a low temperature of 80 °C under atmospheric pressure, and required no complex technological process. Comparing with that prepared by the traditional hydrothermal method , the emission intensity of the prepared Cs 2 InX 5 ·H 2 O (X = Cl/Br) perovskites were increased by two times. Besides, Sb 3+ ions were successfully doped into the matrix of Cs 2 InX 5 ·H 2 O (X = Cl/Br) by our method. After doping with Sb 3+ , the emission intensities of Cs 2 InX 5 ·H 2 O were greatly enhanced, with enhanced by a factor of ∼187 and ∼102, respectively. Importantly, the PLQYs were greatly improved, reaching 79.6% and 42.7%, respectively. Additionally, the effects of Br − on luminescent properties of Cs 2 InCl 5-x Br x ·H 2 O:Sb 3+ (x = 0–5) were also investigated in this work. Though the control of the Br − content, tunable emissions from 575 nm to 630 nm were achieved. These results indicate the prepared samples could be promising environmentally-friendly materials for lightings. Furthermore, this work presents a reliable and simple method for preparing high-quality perovskites.
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