JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Aiqing Zhao,Jinlei Zhang,Yunsong Di,Yajie Guo,Xiaoli Shan,Weiping Zhou,Zhixing Gan
The lead halide perovskite is chemical unstable toward water or other polar solvents because of its ionic nature, which hinders the applications in high-performance and reliable devices. One of the main instabilities is phase conversion among different dimensions of Cs–Pb–Br compounds. In this work, hydration induced phase conversion of Cs–Pb–Br compounds is investigated. There are two anomalous fluorescent variations during the phase conversion: (1) the hydration-induced fluorescence quenching is irreversible; (2) the conversion from Cs 4 PbBr 6 to CsPbBr 3 leads to the weakening of green fluorescence. With our study, we found out: first, the hydration-induced conversion is mainly caused by the precipitation of CsBr. The extracted CsBr is spatially separated from the Cs–Pb–Br compounds, thus breaking the back conversion from CsPbBr 3 to Cs 4 PbBr 6 ; second, for the as-prepared Cs–Pb–Br compounds, the CsPbBr 3 nanodomains are well passivated by wide bandgap Cs 4 PbBr 6 , thus exhibiting a strong green emission. Whereas, after hydration, the passivation by Cs 4 PbBr 6 disappears and a large number of defects and traps appear. Consequently, the green fluorescence intensity decreases although the content of CsPbBr 3 increases.
研究领域:
材料科学
·
光电子学
·
钙钛矿化学
·
纳米材料
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Jiakun An,Gaoyu Chen,Xia Zhu,Xin Lv,Jianchun Bao,Xiangxing Xu
All-inorganic perovskite CsPbX3 (X = Cl, Br, and I) quantum dots (QDs) are emerging as attractive materials for photodetectors due to their prominent positive photoresponse. In this work, ambipolar photodetectors were constructed based on heterojunctions of CsPbX3 QDs and ZnO nanocrystals (NCs). The transition between the positive photoconductivity (PPC) and negative photoconductivity (NPC) was successfully controlled not only by the drain-source voltage (VDS) but also by the excitation wavelength and CsPbX3 crystal size. A high responsivity (R), on–off ratio (η), and detectivity (D*) were achieved for NPC (R = 1046 mA/W, η = 281, and D* = 1.65 × 1011 Jones), with PPC (R = 146 mA/W, η = 64, and D* = 1.54 × 1011 Jones) simultaneously revealed in the same device. A general mechanism combining the type-II heterojunction, the component and size-related band structure, and most critically the in-band trap states of the perovskites was established for understanding the unique ambipolar property. It exhibits application potential in developing functional photodetectors, memristors, and optical logic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·
IF 4.5
Wang Ying,Ye Qiufeng,Hang Pengjie,Yao Yuxin,Li Biao,Kan Chenxia,Zhang Daoyong,Yu Xuegong,Yang Deren
Full-inorganic CsPb(I x Br 1- x ) 3 (0 < x < 1) optoelectronic devices have given rise to widespread interest of researchers owing to their excellent photovoltaic properties and promising thermal stability. However, defects at the interface between the electron transport layer (ETL) and the perovskite layer cause the open-circuit voltage ( V OC ) deficiency for inorganic perovskite solar cells (PSC). In this work, Baclofen (BCF), with carboxy group, amidogen group, and Cl in its molecule, is used as an interlayer between SnO 2 and CsPb(I x Br 1- x ) 3 inorganic perovskite. It is proved that the BCF can not only be beneficial for the growth of perovskite film but also act as a passivation layer for the SnO 2 /perovskite (PSK) interface, which significantly improves the open-circuit voltage of PSCs. Finally, a high V OC of 1.31 V and a power conversion efficiency (PCE) of 15.36% are realized for our BCF-treated PSCs.
研究领域:
材料科学
·
光伏技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Lu Liu,Qinghua Di,Kunhao Xie,Xiaoqin Wang,Xianchang Yu,Yan Yan,Chaoxing He,Jun Wang,Mintao Sun,Yansu Li
The hydrogen peroxide (H 2 O 2 ) plays diverse roles in physiological processes in plants. However, whether and how H 2 O 2 regulates the opening and expansion of cotyledons in plants remains unknown. We demonstrated that CsRBOH5.1 -encoded NADPH oxidase controls diurnal cotyledon opening/closure and expansion. Csrboh5.1 mutants exhibited defective cotyledon movements and reduced brassinosteroids (BR) levels, particularly 28-norbrassinolide and typhasterol. Both exogenous H 2 O 2 and 24- epi brassinolide (EBR) treatments rescued these phenotypic defects. Molecular analyses revealed BR biosynthesis promotion by H 2 O 2 and reciprocal regulation through CsBZR4 transcription factor. EBR upregulated CsBZR4 expression, which directly bound to and activated the CsRBOH5.1 promoter, as confirmed by yeast one-hybrid and dual-luciferase assays. This establishes a self-reinforcing regulatory module: CsRBOH5.1 -derived H 2 O 2 enhances BR synthesis, while BR-induced CsBZR4 transcriptionally activates CsRBOH5.1 expression. Transient overexpression assays in Csrboh5.1 mutants demonstrated that CsBZR4 did not directly regulate cotyledon opening. Our findings revealed the first plant RBOH -mediated H 2 O 2 regulation of cotyledon development and elucidate a novel ‘CsBZR4- CsRBOH5.1 -BR’ feedback mechanism coordinating redox signaling and phytohormone pathways. This module ensures precise control of cotyledon growth dynamics through reciprocal modulation of oxidative metabolism and brassinosteroids synthesis, providing new insights into the integration of redox biology and hormonal regulation in plant organogenesis.
研究领域:
植物生物学
·
分子遗传学
·
氧化还原信号
·
植物激素调控
·
发育生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 20
·14046-14054
·
IF 4.449
Qingxin Zeng,Tingting Yan,Kai Wang,Yinyan Gong,Yong Zhou,Yongli Huang,Chang Q. Sun,Bo Zou
In situ Raman spectroscopy revealed that transiting H2O/NaX (∼64) solutions into an ice VI phase and then into an ice VII phase at a temperature of 298 K requires excessive pressures with respect to pure water. The increase of the critical pressures varies with the solute type in the Hofmeister series order: X = I > Br > Cl > F ∼ 0. The results suggest that the solute hydration creates electric fields that lengthen and soften the O:H nonbond and meanwhile shorten and stiffen the H–O bond through O–O Coulomb repulsion. Compression, however, does the opposite to solute electrification upon the O:H–O bond relaxation. Therefore, compression of the aqueous solutions recovers the electrification-deformed O:H–O bond first and then proceeds to the phase transitions, which requires excessive energy for the same sequence of phase transitions. Ice exclusion of solute disperses the frequencies of characteristic phonons and the critical pressures with unlikely new bond formation.
研究领域:
物理化学
·
高压科学
·
材料科学
·
光谱学
·
水溶液物理
✓ 已验证
DOI
高影响因子
Energy Materials
·
2026
·Vol. 6
·期 8
·N
·
IF 11.9
Leyan She\u003Csup\u003E1\u003C\u002Fsup\u003E,Jiaxin Meng\u003Csup\u003E1\u003C\u002Fsup\u003E,Lide Li\u003Csup\u003E1\u003C\u002Fsup\u003E,Litao Liang\u003Csup\u003E1\u003C\u002Fsup\u003E,Routong Chen\u003Csup\u003E1\u003C\u002Fsup\u003E,Shiyi Tan\u003Csup\u003E1\u003C\u002Fsup\u003E,Guozhen Zhang\u003Csup\u003E1\u003C\u002Fsup\u003E,He Liu\u003Csup\u003E1\u003C\u002Fsup\u003E,Cong Guo\u003Csup\u003E1\u003C\u002Fsup\u003E,Weizhai Bao\u003Csup\u003E1\u003C\u002Fsup\u003E,Jingfa Li\u003Csup\u003E1\u003C\u002Fsup\u003E,Qian Liu\u003Csup\u003E2\u003C\u002Fsup\u003E,Feng Yu\u003Csup\u003E1,\u003C\u002Fsup\u003E,Hongxia Wang\u003Csup\u003E2,\u003C\u002Fsup\u003E
Aqueous bromine batteries hold promise for safe and low-cost large-scale energy storage, but their practical energy density is limited by the restricted voltage of conventional single-electrolyte systems. Herein, we develop a pH-asymmetric aqueous Sn-Br battery by decoupling an acidic bromine catholyte from an alkaline Sn anolyte using a bipolar membrane. The acidic catholyte maintains reversible Br-/Br3- conversion, whereas the alkaline anolyte enables low-potential Sn hydroxo-complex redox chemistry. This acid-alkaline configuration converts the pH-dependent redox asymmetry of Sn into an enlarged full-cell voltage window. A surface-regulated Sn anode is further employed to improve interfacial stability and redox reversibility, while the voltage enhancement primarily originates from pH-decoupled Sn-Br redox chemistry. Potential-alignment analysis shows that switching Sn from acidic Sn/Sn2+ redox to alkaline hydroxo-complex redox increases the theoretical Sn-Br potential gap from approximately 1.2 V to above 2.0 V. In situ Ultraviolet-Visible (UV-vis) Absorption spectroscopy confirms reversible bromine-species evolution during charge/discharge, demonstrating the compatibility of bromine redox chemistry with high-voltage operation. The resulting pH-asymmetric Sn-Br full cell achieves a voltage window of up to 2.3 V, delivers a specific capacity of approximately 172.2 mAh g-1 at 3 A g-1, and maintains 98% capacity retention over 6,000 cycles with Coulombic efficiency above 97%. This study highlights pH decoupling as a powerful strategy for designing high-voltage aqueous conversion batteries based on pH-dependent metal redox chemistry.
✓ 已验证
DOI
高影响因子
Small Methods
·
2024
·Vol. 8
·期 12
·2400143
·
IF 10.7
Shouying Mu,Ye He,YueLi Wang,Wei Chen,Chunyan Lv,Xiaojuan Liang,Weidong Xiang,Zhaopin Chen
Perovskite quantum dots can form various forms such as nanowires, nanorods, and nanosheets through self-assembly. Nanoscale self-assembly can be used to fabricate materials with excellent device properties. This study introduces AuBr 3 into CsPb(Br/I) 3 quantum dots, causing them to assemble into nanowires. The nanowires form because part of Au 3+ is surface-doped to replace Pb 2+ , and the [PbX6] 4− octahedral structure is distorted. The symmetry of the structural surface is broken, and a dipole-moment-induced field is generated, thus promoting self-assembly. Moreover, the presence of Au nanoparticles (NPs) causes a localized surface plasmon resonance and generates strong van der Waals forces that promote self-assembly. Finally, to test other applications of perovskite nanowires, the solution method is used to prepare films by compounding the sample solution and polystyrene (PS) for backlighted displays.
研究领域:
材料科学
·
纳米技术
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 25
·e202104463
·
IF 5.02
Yue Liu,Yuxiang Wang,Haoran Cheng,Zheng Ma,Qian Li,Gang Wang,Daocheng Pan,Limin Wang,Jun Ming
Graphical A new soluble CsPbX 3 precursor to in-situ prepare luminescent CsPbX 3 nanocrystal film in the air readily was designed. The composition of the CsPbX 3 NCs films can be tuned by changing the solution precursors, allowing obtaining a high color purity and a narrow emission width. Inorganic cesium lead halide perovskite nanocrystals are candidates for lighting and display materials due to their outstanding optoelectronic properties. However, the dissolution issue of perovskite nanocrystals in polar solvents remains a challenge for practical applications. Herein, we present a newly designed one-step spin-coating strategy to prepare a novel multicolor-tunable CsPbX 3 (X=Cl, Br, I) nanocrystal film, where the CsPbX 3 precursor solution was formed by dissolving PbO, Cs 2 CO 3 , and CH 3 NH 3 X into the ionic liquid n-butylammonium butyrate. The as-designed CsPbX 3 nanocrystal films show high color purity with a narrow emission width. Also, the blue CsPb(Cl/Br) 3 film demonstrates an absolute photoluminescence quantum yields (PLQY) of 15.6 %, which is higher than 11.7 % of green CsPbBr 3 and 8.3 % of red CsPb(Br/I) 3 film. This study develops an effective approach to preparing CsPbX 3 nanocrystal thin films, opening a new avenue to design perovskite nanocrystals-based devices for lighting and display applications.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2013
·
IF 2.04
Lingyun Dong,Shilie Pan,Hongping Wu,Xin Su,Hongwei Yu,Ying Wang,Zhaohui Chen,Zhenjun Huang,Zhihua Yang
A series of lead-containing halogen oxyborates, Pb 6 B 3 O 10 X ( X =F, Cl, Br), have been grown by high-temperature solution method and their crystal structures were determined by single-crystal X-ray diffraction. They are isostructural and crystallize in the space group Pbcm of the orthorhombic crystal system . The crystal structures are dominated by one-dimensional ∞ [(Pb 4 O)(BO 3 ) 3 ] “ Zig-Zag ”-chains, while the remaining Pb atoms and X ( X =F, Cl, Br) atoms are filled to balance the charge. Compared with the previously reported compound Pb 4 O(BO 3 ) 2 (the molecular formula Pb 4 O(BO 3 ) 2 can be regarded as Pb 6 B 3 O 10.5 ) with the space group Aba 2, the structures of Pb 6 B 3 O 10 X ( X =F, Cl, Br) are completely different from that of Pb 4 O(BO 3 ) 2 . IR spectroscopy , UV–vis-NIR diffuse reflectance spectroscopy , thermal analysis, and theoretical calculations were also performed on the reported materials.
研究领域:
材料科学
·
晶体学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 19
·56188-56197
·
IF 5.8
Chen Jingwen,Wu Menglin,Ni Jiupai,Ni Chengsheng
Photocatalysis using the visible light of the sun is an environmentally friendly method of eliminating the NOx pollutant from the ambient air. Although Cs 3 Bi 2 Br 9 , a semiconductor with a band gap of 2.54 eV, may be a strong absorber of visible light, its photocatalysis towards the abatement of NOx is unknown. In this study, Cs 3 Bi 2-x Pb x Br 9-x (0 ≤ x ≤ 0.0789) are used for the photocatalytic oxidation of NOx. A significant NO oxidation efficiency (80%) is observed over Cs 3 Bi 2-x Pb x Br 9-x (x = 0.0443) under visible light, which is attributable to the Br vacancy ( V Br ) brought about by Pb 2+ doping. The presence of V Br increased the ionic selectivity of in the oxidized NO. At higher Pb doping level, two HONOs adsorbed on the V Br , linked, and then reduced by hot electrons to produce N 2 O 2 2− . The di-azo coupling could passivate the activation of NO on the V Br . This work advances the defect engineering of halide for the photo-driving solid–gas reaction in air.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Yuanjian Chen,Zhengli Zhang,Ruirui Cui,Yi Wang,Ting Yang,Yong Deng,Shaolu Chen,Junli Li
The appearance of the cathode interlayer (CIL), a transition bridge between the cathode and the organic photoactive layer (OPL), provides a new pathway for the performance improvement of organic solar cells (OSCs). PFN-Br is widely employed in many optoelectronic devices, including nonfullerene OSCs, to transport electrons and improve charge injection at the interface. However, due to the relatively low conductivity of PFN-Br, the thickness of the CIL prepared with PFN-Br is usually less than 10 nm, which evidently contradicts the requirements for large-scale roll-to-roll manufacturing. Herein, a strategy using N-α-carbobenzyloxy-d-Arginine (NA) as the doping material is proposed to improve the performance of PFN-Br. The homogeneous distribution of NA in PFN-Br can modify the work function (WF) of PFN-Br and facilitate an interface dipole arrangement that is favorable for charge transfer, resulting in binary CILs with a tunable WF and increased conductivity. To verify this method, a series of devices were prepared with PBDB-T:IT-M or PM6:Y6 as the OPL and different proportions of NA in the CIL. The use of PFN-Br:NA (0.75:0.06, in weight%) in devices helps to improve the OPL morphology, making it exhibit a trend of fiber network structure, leading to a higher fill factor and short circuit current density. Consequently, the optimal power conversion efficiency (PCE) based on the PBDB-T:IT-M and PM6:Y6 is increased from 10.5% to 11.1% and from 15.4% to 16.0%, respectively. In addition, the NA-doped device exhibits better nitrogen stability after 360 h of dark storage compared to the control. The discovery of these modification approaches provides insight into the hybrid cathode interlayers required for efficient and reliable nonfullerene OSCs.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Plant Communications
·
2024
·
IF 9.4
Hong Wei,Heyuan Zhu,Wei Ying,Hilde Janssens,Miroslav Kvasnica,Johan M. Winne,Yongxiang Gao,Jiří Friml,Qian Ma,Shutang Tan,Xin Liu,Eugenia Russinova,Linfeng Sun
Brassinosteroids (BRs) are steroidal phytohormones indispensable for plant growth, development, and responses to environmental stresses. The export of bioactive BRs to the apoplast is essential for BR signalling initiation, which requires binding of BR molecule to the extracellular domains of the plasma membrane-localized receptor complex. We have previously shown that the Arabidopsis thaliana ATP-binding cassette (ABC) transporter, ABCB19, functions as a BR exporter, and together with its close homologue, ABCB1, positively regulate BR signalling. Here, we demonstrate that ABCB1 is another BR transporter. The ATP hydrolysis activity of ABCB1 was stimulated by bioactive BRs, and its transport activity was confirmed in proteoliposomes and protoplasts. Structures of ABCB1 in substrate-unbound (apo), brassinolide (BL)-bound, and ATP plus BL-bound states were determined. In the BL-bound structure, BL was bound to the hydrophobic cavity formed by the transmembrane domain, and triggered local conformational changes. Together, our data provide additional insights into the ABC transporter-mediated BR export.
研究领域:
植物生物学
·
分子生物学
·
结构生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）