PHYSICA SCRIPTA
·
2023
·Vol. 99
·期 1
·015526
·
IF 2.9
Tao Zhang,Siyu Cai,Nina Liang,Yalei Gao,Yuanpeng Li,Fuchi Liu,Lizhen long,Jun Liu
Zero-dimensional (0D) and one-dimensional (1D) mixed heterostructure semiconductors can bring superior electrical and optoelectronic performances due to the synergistic advantages of different dimensionalities. Here, a metal-semiconductor–metal (MSM) ultraviolet (UV) photodetector based on 1D-0D TiO2/CsPbBr3 heterostructure semiconductor is constructed, which exhibits excellent photodetection performance. A back-to-back Schottky contact is formed in the MSM (Au/TiO2/Au) structure due to the large band-energy bending resulted from the abundant surface-states at 1D-TiO2 surface. Under an applied voltage, a small saturation current flows through the device. Benefiting from the decoration of CsPbBr3 QDs, the dark current of MSM photodetectors can be further suppressed, and producing the improved on/off ratio (Ilight/Idark), photoresponsivity (Rλ), and detectivity (D*). PL properties study suggested that an energy transfer is occurred between the 0D-CsPbBr3 and 1D-TiO2. The TiO2/CsPbBr3 heterojunctions are beneficial for photo-induced charge transfer in hetero-interface because of the type-II energy-band alignment, but not non-radiative energy transfer from 0D-CsPbBr3 to 1D-TiO2. On the whole, this study depicts a fascinating coupling architecture of mixed-dimensional materials toward implementing low-cost and high-performance optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 12
·2200452
·
IF 4.402
Yongqi Zhu,Yuxue Liu,Bowen Jin,Yang Shi,Zixin Wu,Jinguo Cao,Haijin Li,Congcong Wu
Metal halide perovskites (MHPs) emerging as a promising semiconducting material have shown superiority in optoelectronic applications. Currently, polycrystalline perovskite thin films are dominantly employed; while owing to the existence of grain boundary, the polycrystalline films typically have charge transport issues. To overcome these limitations, a perovskite single crystal (SC) is synthesized and applied owing to the more superior bulk charge transport properties compared with its polycrystalline counterpart. Nevertheless, due to the defective nature of the crystal surface, the surfaces of single crystals remain the bottleneck that not only induces stability issues but also causes interfacial charge carrier recombination. In this work, triple cation perovskite single crystals, FA 0.8 MA 0.15 Cs 0.05 PbI 3 (denoted as FAMACs) are synthesized, and a facile surface modification strategy is reported for single crystals by polymer monolayer coupling, which shows high effectiveness for improving stability and reducing surface trap state density for single crystals. The polymer-wrapped single crystals exhibit robust stability and a well-passivated surface, which shows an order of magnitude lower trap density compared with those of unmodified single crystals and achieves a high responsivity of 5.069 A W −1 when used in photodetector applications.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Sheng’an Yang,Qingming Chen,Yunrui Yang,Yan Gao,Ruidong Xu,Hui Zhang,Ji Ma
Perovskite manganite La 1− y Ca y MnO 3 has giant and tunable magnetoresistance ( MR ) and anisotropic magnetoresistance ( AMR ), still the following two challenges are of great concern: (i) large magnetic field is required for achieving excellent electromagnetic performance; and (ii) metal–insulator (M–I) transition temperature ( T MI ) significantly different from room temperature; both these factors limit its practical applications. In this study, polycrystalline La 0.7 Ca 0.3 MnO 3 :Ag x composites were fabricated by sol–gel and solid–phase addition methods, and large MR and AMR (84.1% and 32%, respectively) were obtained at near room temperature in 1 T magnetic field when x = 0.2. Evidently, it was found that the grain boundary scattering effects were weakened due to Ag−addition, which resulted in an enhancement of MR . The tremendously high AMR value was attributed to the anisotropic spin–orbit coupling (SOC) effect. The electron–scattering and small–polaron hopping models were used to successfully fit the resistivity data, which support the SOC effect under different magnetic fields that enhance the AMR . These results support further development of the perovskite manganese oxide with potential applications in manganite devices.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 14
·期 6
·e202101539
·
IF 5.686
Siwei Zhao,Shaohua Jin,Huanmin Liu,Youxin Su,Wei Liu,Shengfu Li,Chongchong She,Haonan Li,Kun Chen
Graphical A series of all-inorganic lead-free halide perovskite inverse opals were prepared and furtherly used as the photocatalysts to promote the polymerization of EDOT under the irradiation of visible light. All the samples exhibited the nice replica of the artificial template and high crystallinity. The bandgap of the catalysts was adjusted by screening the ratios of bromide to iodide and antinomy to bismuth. Cs 3 Bi 0.5 Sb 1.5 Br 9 showed the highest performance of the photocatalytic polymerization for EDOT, indicating the dual halide perovskites are more flexible than single halide perovskite in terms of bandgap engineering. A series of all-inorganic lead-free halide perovskite inverse opals were prepared and furtherly used as the photocatalysts to promote the polymerization of 3, 4-ethylenedioxythiophene (EDOT) under the irradiation of visible light. All the samples exhibited the nice replica of the artificial template and high crystallinity. The bandgap of the catalysts was adjusted by screening the ratios of bromide to iodide and antinomy to bismuth, respectively. Among all the samples, Cs 3 Bi 0.5 Sb 1.5 Br 9 inverse opal showed the best catalytic performance and the excellent stability in terms of the morphology and the crystalline phase after four cycles of photocatalytic polymerization. Since EDOT is commercially available, the present observation suggested a convenient protocol of preparing the composited materials or optoelectronic devices based on the lead-free halide perovskites and the conductive poly(3, 4-ethylenedioxythiophene).
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 3
·036201
·
IF 1.929
Hui Yu,Xinan Shi,Lijian Huang,Xiaojiao Kang,Daocheng Pan
A series of Eu3+ and Tb3+ co-doped CaMoO4/SrMoO4 luminescent thin films were prepared by a facile solution method, and they were annealed at 550 °C for 2 h. The luminescent properties of the thin films were studied, which involve the energy transfer from Tb3+ to Eu3+. The emission color can be changed from green to red, with increasing Eu3+ doping concentration in Tb3+-doped CaMoO4/SrMoO4 thin films. In addition, it was observed that the PL intensity of Eu3+ will enhance when Tb3+ ions are incorporated into Eu3+-doped CaMoO4/SrMoO4 thin films. The optical band gaps of the luminescent thin films are found to be in the range of 4.49 to 4.72 eV. These results revealed that Eu3+ and Tb3+ co-doped CaMoO4/SrMoO4 luminescent thin films have a significantly potential application in electroluminescent devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2021
·Vol. 42
·期 7
·2000701
·
IF 5.734
Shijun Long,Zhihua Ye,Yiqi Jin,Jiacheng Huang,Yiwan Huang,Yonggui Liao,Xuefeng Li
Rewritable information record materials usually demand not only reversibly stimuli-responsive ability, but also strong mechanical properties. To achieve one photochromic hydrogel with super-strong mechanical strength, hydrophobic molecule spiropyran (SP) has been introduced into a copolymer based on ion-hybrid crosslink. The hydrogels exhibit both photoinduced reversible color changes and excellent mechanical properties, i.e., the tensile stress of 3.22 MPa, work of tension of 12.8 MJ m −3 , and modulus of elasticity of 8.6 MPa. Moreover, the SP-based Ca 2+ crosslinked hydrogels can be enhanced further when exposed to UV-light via ionic interaction coordination between Ca 2+ , merocyanine (MC) with polar copolymer chain. In particular, hydrogels have excellent reversible conversion behavior, which can be used to realize repeatable writing of optical information. Thus, the novel design is demonstrated to support future applications in writing repeatable optical information, optical displays, information storage, artificial intelligence systems, and flexible wearable devices.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Applied Catalysis O: Open
·
2024
·
IF 0
Ximu Li,Haibo Yao,Jie Miao,Wei Zhou,Zongping Shao
This study aimed to construct a perovskite LaMnO 3+δ (LMO) with abundant oxygen vacancies (OVs) by an electrochemical approach at different potentials and figure out the role of OVs in peroxymonosulfate (PMS) activation. All modified samples achieved superior PMS activation activity than LMO (0.49 min −1 ) towards Rhodamine B (RhB) removal, LMO + 2 with more OVs showed the best performance (1.21 min −1 ). OVs regulated the Mn 3+ /Mn 4+ redox cycle and increased active sites, triggering RhB oxidation in LMO + 2/PMS system via a 1 O 2 -dominated nonradical pathway. These results suggest that perovskites efficiently enriched OVs through an electrochemical strategy and regulated activating PMS towards 1 O 2 -dominated oxidation.
研究领域:
环境科学
·
材料科学
·
电化学
·
催化化学
✓ 已验证
DOI
Exploration
·
2024
·
IF 0
Xue Bai,Jun Kang,Silong Wei,Yun Wang,Yangsui Liu,Bo Yuan,Qian Lu,Huansong Li,Jun Yan,Xi Yang,Jin Chang
Sonodynamic therapy offers a non-invasive approach to induce the death of tumor cells. By harnessing ultrasound waves in tandem with sonosensitizers, this method produces reactive oxygen species (ROS) that inflict oxidative damage upon tumor cells, subsequently causing their demise. Ferroptosis is a regulatory form of cell death that differs from other forms, characterized by iron accumulation, ROS accumulation, and lipid peroxidation. In the presented research, a nanoparticle formulation, parthenolide/ICG-CaCO 3 @lipid (PTL/ICG-CaCO 3 @Lip), has been engineered to amplify ferroptosis in tumor cells, positioning it as a potent agent for sonodynamic cancer immunotherapy. This nanoparticle significantly augments ROS levels within tumor cells, inducing oxidative stress that leads to cell death. The therapeutic potential of PTL/ICG-CaCO 3 @Lip, both in vivo and in vitro, has been convincingly demonstrated. Furthermore, RNA-seq analysis insights revealed that PTL/ICG-CaCO 3 @Lip facilitates tumor cell ferroptosis by regulating P53 to downregulate SLC7A11 protein expression, thereby inhibiting the glutamate-cystine antiporter system Xc − and stimulating ACSL4/LPCAT3 pathways. This pioneering work uncovers an innovative strategy for combatting tumors, leveraging enhanced oxidative stress to promote cell ferroptosis, and paves the way for groundbreaking cancer immunotherapeutic interventions.
研究领域:
肿瘤学
·
生物医学工程
·
药理学
·
分子生物学
✓ 已验证
DOI
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 18
·11020-11027
·
IF 10.7
Wenhao Zheng,Xiao Peng,Wenjing Zhai,Lin Huang,Peizhuo Chen,Penghui Shi,Xiaohui Zhou,Jianguo Wan,Zhibo Yan,J.-M. Liu
Tin-based halide perovskites have become the prospective photoelectric materials due to their remarkable optoelectronic properties and relatively low toxicity. However, the rapid crystallization and easy oxidation of Sn2+ to Sn4+ made it challenging to fabricate efficient photoelectric devices. Herein, benzylamine boron trifluoride (BBF) was introduced into the FASnI3 precursor solution to tune the crystal quality and photoelectric properties of FASnI3 films. It was demonstrated that the BBF passivates the film defects, reduces the content of Sn4+, enhances the PL intensity and stability, and improves the responsivity at wavelengths from 415 to 980 nm. The treatment of BBF with an optimal concentration of 1.5 mg mL−1 improves the responsivity of the device from 0.89 to 2.6 A W−1. The coordination of BBF with the anions/cations in the perovskite precursor is suggested to account for the improvement of crystal quality and the photoelectric properties of FASnI3 films.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yuzhu Li,Zongbao Zhang,Yang Zhou,Lai Xie,Naitao Gao,Xubing Lu,Xingsen Gao,Jinwei Gao,Lingling Shui,Sujuan Wu,Junming Liu
Metal halide perovskite solar cells have drawn a lot of attention due to their excellent photovoltaic properties. However, a simple method to prepare perovskite films with high quality in ambient air remains a big challenge, which has become an obstacle for the commercialization of PSCs. Here we propose a facile method to prepare efficient CH 3 NH 3 PbI 3-x (SCN) x -based planar PSCs in ambient conditions and ammonium salts (NH 4 Cl, NH 4 SCN) are used to regulate the microstructure of CH 3 NH 3 PbI 3-x (SCN) x perovskite film prepared in ambient air. At the optimal concentration, the devices with NH 4 Cl or NH 4 SCN additives achieve the champion efficiency of 14.71% and 16.61% respectively, which are much higher than the 12.97% of the reference device. The stability of the unsealed devices with additives in ambient air has also been significantly improved. The modified devices without any encapsulation still retain about 80% of initial efficiency after 30 days in ambient air. The conductive atomic force microscopy and photoluminescence measurement are used to characterize photoelectric properties of perovskite film. The trap-state density and charge recombination of the devices have been investigated. The results suggest that the improved photovoltaic characteristics and stability may be attributed to the improved quality of perovskite films, the reduced trap states and the suppressed charge recombination.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF IMMUNOPATHOLOGY AND PHARMACOLOGY
·
2025
·
IF 2.6
Jie-Fang Gao,Tong-Xuan Li,Guo-Qiang Zhang
The skin serves as the primary defensive barrier of the human body against external stimuli and damage. Keratinocytes, which are the predominant cell type in the human epidermis, undergo a differentiation process that is crucial for the formation of the skin barrier. Myricetin, a dietary flavonoid present in various fruits and vegetables, is known to play a significant role in maintaining intestinal barrier function; however, its impact on the skin barrier remains inadequately understood. Consequently, this study investigates the effects of myricetin on the differentiation of epidermal keratinocytes and the integrity of the skin barrier. Differentiation of primary mouse keratinocytes was induced using 1.8 mM CaCl2. tudy demonstrated that myricetin effectively suppresses cell proliferation and induces both cell cycle arrest and calcium ion (Ca2+) influx, without influencing apoptosis. Concurrently, myricetin enhances the expression of differentiation markers, including K10, TGase1, Filaggrin, and Involucrin, and facilitates the formation of tight junctions. Upon examining the underlying mechanisms, we discovered that myricetin activates the TRPV4 channel, and the promotion of keratinocyte differentiation by myricetin is contingent upon the activation of this channel. In summary, these findings suggested that myricetin could promote keratinocytes differentiation and have well-established skin barrier protective function.
研究领域:
细胞生物学
·
皮肤病学
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 16
·165402
·
IF 3.399
Xiaojie Ni,Lei Lei,Yu Yu,Junjie Xie,Ming Li,Songwang Yang,Mei Wang,Jiandang Liu,Hongjun Zhang,Bangjiao Ye
Pristine and Br-doped H2N = CHNH2Pb(I1−xBrx)3 (FAPb(I1−xBrx)3, Br content x = 0, 0.05, 0.15, 0.2, 0.3, and 0.4) films were prepared. The effect of Br-doping on phase stability, defect density, and performance of FAPb(I1−xBrx)3 was investigated by x-ray diffraction (XRD), scanning electron microscopy, ultraviolet–visible–near infrared absorbance spectroscopy, x-ray photoemission spectroscopy (XPS), Kelvin probe force microscopy (KPFM), positron annihilation spectroscopy, and current density–voltage (J–V) characteristics. The XRD measurements exhibit the enhancement of perovskite phase stability at x = 0.05. However, the phase stability decreases gradually with Br content (x) over 0.05. The increase of Br-doping content leads to the downshifting of both valence band (VB) position (indicated by XPS) and Fermi level (illustrated by KPFM). The energy level shifts are most probably due to the increase of Br 4p orbital content in VB and the change of self-doping levels. Doppler broadening spectra of positron annihilation radiation of the samples reveal that, the defect densities of Br-doped samples are much lower than that of pristine FAPbI3. For FAPb(I0.95Br0.05)3 sample, a high photoelectric conversion efficiency of 17.12% (25.7% higher than that of undoped sample) is successfully achieved. The significant enhancement of photoelectric conversion efficiency realized by Br-doping is attributed to the improvement of morphology, high phase stability, and low defect densities.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）