Solar RRL
·
2021
·Vol. 5
·期 5
·2100102
·
IF 8.582
Cheng Niu,Chang Wang,Gaojie Zhang,Qianqian Zhao,Cheng Fang,Wangnan Li,Fuzhi Huang,Zhiliang Ku,Yi-bing Cheng
Despite tremendous progress in efficiency and stability, perovskite solar cells are still facing the challenge of scalability and reproducibility. Vapor–solid reaction methods that derived from the chemical vapor deposition have been regarded as facile approaches to prepare perovskite films with large size. However, different from the precise control of compounding ratio by weighting in the solution process, the perovskite films deposited by vapor–solid reaction methods always suffer from undesired I − /Br − ratio, leading to poor performance of the solar device. Thus, controllable halogen exchange in the vapor–solid reaction process is significant for the further development of this technique. Herein, different alkali-metal ions (such as Na + , K + , and Rb + ) are added into the inorganic CsBr/PbI 2 framework, and it is found that the halogen exchange in the vapor–solid reaction process can be regulated by these ions. After optimization, high-quality Rb-Cs 0.14 FA 0.86 Pb(Br x I 1- x ) 3 films with proper I − /Br − ratio are successfully obtained. Perovskite solar cells based on the as-prepared perovskite films exhibit a significant enhancement on V oc and the champion power conversion efficiency reaches 19.6% with a V oc of 1.13 V.
研究领域:
材料科学
·
光伏技术
·
半导体器件
·
无机化学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Zhongnan Guo,Fan Sun,Danilo Puggioni,Yubo Luo,Xiaotong Li,Xiuquan Zhou,Duck Young Chung,Erjian Cheng,Shiyan Li,James M. Rondinelli,Wenxia Yuan,Mercouri G. Kanatzidis
Metal cluster compounds have garnered renewed interest in the search for novel superconductors and topological semimetals owing to structural instabilities of metal-cluster geometries and broken symmetries. Here we synthesized needle-like crystals of the V-cluster-based quasi-one-dimensional (Q1D) materials AV3Q3Oδ (A = K, Rb, Cs, Q = Se, Te) which can also be viewed as being composed of parallel nanowires. We examine how changes in their average and local structure control their electronic properties. All compounds crystallize in the TlFe3Te3-type structure (P63/m space group) with infinite (V3Q3)− double-walled columnar chains separated by A+ cations. Our single-crystal and synchrotron powder diffraction studies indicate oxygen atoms partially occupy the center site of the V6 octahedral metal cluster cages in KV3Te3O0.33, RbV3Te3O0.32, and CsV3Te3O0.35, whereas KV3Se3 is structurally oxygen-free. Our synchrotron X-ray pair distribution function (PDF) analyses indicate that the oxygen-free V6 cluster octahedra in KV3Se3 are highly distorted perpendicular to the chain direction even at room temperature, reducing the symmetry of the average structure from hexagonal P63/m to monoclinic P21/m. Our theoretical calculation supports this P21/m distortion and suggests the structure further distorts to P21 or P21/c at lower temperatures. In contrast, the oxygen-centered V-cluster in KV3Te3O0.33 exhibits a V3-triangle-trimerization along the chain direction. This feature is discernible from the local PDF and is consistent with lattice dynamical calculations based on density functional theory. Resistivity measurements indicate that KV3Se3 exhibits metallic behavior, whereas a dramatic metal–semiconductor–metal transition emerges in KV3Te3O0.33, RbV3Te3O0.32, and CsV3Te3O0.35 because of oxygen disorder and changes in local structure captured from our electronic structure analyses of the Fermi surface. Our investigation of the AV3Q3Oδ family demonstrates the importance of understanding local changes in structure driven by electronic instabilities, which can guide the search for new quantum materials in other low-dimensional cluster-compound materials.
研究领域:
材料科学
·
凝聚态物理
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Hussin Elkik,Muhammad Mujahid Iqbal,Aqsa Munawar,Zhihua Yang,Fangfang Zhang,Shilie Pan
The development of robust strategies for designing high-performance ultraviolet (UV) birefringent materials has become a critical challenge. The combination of alkali metal and Ca2+ cations, which do not exhibit d–d or f–f transitions, with [NO3]− anions that possess high polarizability anisotropy results in the synthesis of three hydrated alkali metal calcium nitrates, ACa(NO3)3·2H2O (A = NH4, Rb, Cs). The title compounds were synthesized at room temperature using the water solution–evaporation technique, featuring a unique chain-like structure composed of [CaO9] polyhedra and [NO3]− units. The compounds exhibit notable optical properties, including short UV absorption edges (220–235 nm) and moderate birefringence (0.077–0.086 at 546 nm). Detailed structural investigation and theoretical analyses reveal that the birefringence is primarily due to the planar triangular arrangement of the [NO3]− groups. This research not only increases the structural diversity within inorganic materials but also provides a key approach for further studies of all-inorganic birefringent optical materials in the UV region.
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Wenhao Xing,Chunlan Tang,Pifu Gong,Jieyun Wu,Zheshuai Lin,Jiyong Yao,Wenlong Yin,Bin Kang
The continuous exploration of multinary chalcogenide semiconductors has provided a variety of new functional materials. In this paper, four new quaternary chalcogenides AHgPS4 (A+ = Na+, K+, Rb+, Cs+) have been prepared by solid-state syntheses. These findings complement the lack of research on this quaternary system. Influenced by the size effect of cations and the coordination mode of Hg, the four compounds crystallize in four different space groups [NaHgPS4, P4̅n2; KHgPS4, Pnn2; RbHgPS4, P21/n; CsHgPS4, P212121] and show an interesting evolution from a 3D framework structure to a 1D chain structure. Moreover, all of these compounds feature noncentrosymmetric (NCS) structures except for RbHgPS4. The materials exhibit wide band gaps of 2.7 eV < Eg < 3.0 eV. The NCS- related second-harmonic-generation (SHG) property of NaHgPS4 and KHgPS4 was also studied. They display strong powder SHG responses (3.14 × AgGaS2 for NaHgPS4; 4.15 × AgGaS2 for KHgPS4), which indicate their intriguing potential as IR nonlinear-optical materials. Moreover, first-principles theoretical calculations were performed to understand the structure–property relationships of these materials.
研究领域:
材料科学
·
无机化学
·
非线性光学
·
固态化学
·
晶体学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2016
·Vol. 27
·期 23
·235601
·
IF 3.573
Fang Zhou,Bin Zheng,Ying Zhang,Yudong Wu,Hanjie Wang,Jin Chang
Combined therapy now plays a major role in cancer therapy due to the outcome of huge amounts of scientific experiments in recent years. However, all systems designed previously have been unable to simultaneously deliver therapy effects using several methods to produce a greater overall therapeutic effect. To solve the problem, we constructed a delivery system of near-infrared light (NIR)-triggered reactive oxygen species (ROS)-sensitive nanoparticles (NPs) for simultaneous chemotherapy and photodynamic therapy (PDT). The inner NP was assembled from a hydrophobic upconverting nanoparticle (UCN) core, with a thin silica shell linked with rose bengal (RB). Finally, a type of ROS-induced biodegradable polymer named poly-(1, 4-phenyleneacetone dimethylenethioketal) (PPADT) was self-assembled to form the NP as an outer shell to load the inner NP and doxorubicin (DOX). As the results show, the UCN core works as a transducer to convert deeply penetrating NIR to visible light for activating the photosensitizer RB for PDT under NIR excitation. In the meantime, the redundant ROS caused PPADT to biodegrade to release the loaded DOX, realizing simultaneous chemotherapy and PDT. Properties such as structure, size distribution, morphology, Fourier transform infrared spectroscopy, ROS production test, cell uptake test and combined therapy treatment effect in vitro were evaluated to prove NIR triggered ROS-sensitive (UCN/SiO2-RB + DOX)@PPADT NPs. Based on our data, this delivery system could provide an effective means to realize simultaneous chemotherapy and PDT through external NIR-triggered ROS sensitivity.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Runqing Liu,Hongping Wu,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu
Four new Bi(III) phosphates, K 6 Bi 13 (PO 4 ) 15 , K 5 Bi(P 2 O 7 ) 2 , and A 5 Bi 5 (PO 4 ) 4 (P 2 O 7 ) 2 (A= K, Rb) with the different condensed P-O groups have been successfully synthesized via the solid-state reactions. The single crystals X-ray diffractions show that they crystallize in the different space groups (K 6 Bi 13 (PO 4 ) 15 : C 2; K 5 Bi(P 2 O 7 ) 2 : P 1 ¯ ; K 5 Bi 5 (PO 4 ) 4 (P 2 O 7 ) 2 and Rb 5 Bi 5 (PO 4 ) 4 (P 2 O 7 ) 2 : P 2 1 / c ). The structure of K 6 Bi 13 (PO 4 ) 15 can be described as a three-dimensional (3D) network composed of the Bi-O polyhedra and PO 4 tetrahedra with K atoms filling in the space to balance the residual charges. K 5 Bi(P 2 O 7 ) 2 features 2D [BiP 4 O 14 ] ∞ layers built by the BiO 6 octahedra and P 2 O 7 dimers and the adjacent [BiP 4 O 14 ] ∞ layers are bridged by the K atoms. A 5 Bi 5 (PO 4 ) 4 (P 2 O 7 ) 2 (A = K, Rb) contain two different condensed P-O groups, PO 4 tetrahedra and P 2 O 7 dimers, which are connected by Bi-O polyhedra to construct the complicated 3D framework with K/Rb atoms located in the tunnels. Note that, the compounds that simultaneously contain two different types of P-O groups are still rare in phosphates. Detailed structural comparisons of Bi 3+ -containing phosphates indicate that the Bi/P ratios have a significant effect on the condensed degrees of PO 4 groups. Furthermore, TG-DSC, IR, UV-Vis-NIR diffuse reflectance spectra and SHG test for title compounds have also been reported.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2017
·
IF 9.466
Bin-Wen Liu,Min-Yi Zhang,Xiao-Ming Jiang,Shu-Fang Li,Hui-Yi Zeng,Guo-Qiang Wang,Yu-Hang Fan,Yong-Fei Su,Chunsen Li,Guo-Cong Guo,Jin-Shun Huang
Two new polar polyselenides Rb4Ge4Se12 (1) and Cs4Ge4Se12 (2) with rarely reported dimeric [Ge2Se4(μ-Se2)]4– units were synthesized. They present large second-harmonic generation (SHG) intensities of 7.5 and 6.5 times that of the benchmark AgGaS2 with type I phase-matching behavior, high laser-induced damaged thresholds, a wide transmission region and congruently melting behavior, making them excellent candidates for IR nonlinear optical (NLO) applications. The SHG functional motifs of both compounds are determined to be [Ge2Se4(μ-Se2)]4– unit by time-dependent density functional theory calculation, which further reveals that charge transfers from the lone pairs of terminal Se atoms to the five σ* orbitals of five-membered ring Ge2Se3 have a predominant contribution to the total SHG effect.
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产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Tong Yu,Lin Xiong,Xiaomeng Liu,Yi-Chang Yang,Zheshuai Lin,Li-Ming Wu,Ling Chen
Deep-ultraviolet (deep-UV) nonlinear optical (NLO) phosphates have become a continuing hot spot since the discovery of Ba3P3O10X. Herein, we report two new deep-UV NLO phosphates, KZn(PO3)3 and RbZn(PO3)3, crystallizing in the asymmetric R3 (No. 146) space group with a three-dimensional (3D) network constructed by [PO3]∞ chains and distorted C3v [ZnO6] octahedra. Both compounds exhibit phase-matchable behaviors with relatively strong powder SHG intensities (about 0.6× and 0.7× those of the benchmark KDP) and short deep-UV cutoff edges (<200 nm). First-principles calculations reveal the synergy of the distorted [ZnO6] octahedron and the flexible [PO3]∞ chain that contribute respectively to the d16 value by 14 and 84% in KZn(PO3)3 or 6 and 93% in RbZn(PO3)3. Remarkably, the SHG-active [ZnO6] herein is pointed out for the first time, which offers an unconventional access to the design and searches for deep-UV NLO material candidates.
研究领域:
材料科学
·
晶体化学
✓ 已验证
DOI
高影响因子
ORAL DISEASES
·
2026
·
IF 3.1
Jiaying Shi,Shuxian Lin,Jiayu Yan,Wanyi Tang,Xiaohua Wu,Shuwen Ding,Siyi Chen,Ruowen Zhao,Junhua Wu
Background Osteoradionecrosis of the jaw (ORNJ) is a severe radiotherapy complication with unclear molecular drivers. CDKN1A/p21 is upregulated by radiation-induced DNA damage, but its role in ORNJ remains unknown. Methods An ORNJ mouse model was established. Single-cell RNA-sequencing of irradiated mandibles was analyzed and validated in vivo. Irradiated jaw bone marrow mesenchymal stem cells (JBMMSCs) were characterized. p21 was inhibited using UC2288 and siRNA. A UC2288-loaded AlgMA hydrogel was developed for local delivery. Results Bone healing was compromised in ORNJ. Radiation induced p21 upregulation in osteogenic lineage cells, which promoted Rb dephosphorylation and aberrant Smad2/3 phosphorylation, thereby suppressing Runx2-mediated osteogenesis. p21 inhibition reversed this cascade and restored osteogenic differentiation. Local delivery of UC2288@AlgMA significantly enhanced bone regeneration. Conclusion p21-related signaling impairs bone healing after irradiation, and local UC2288 delivery via AlgMA hydrogels represents a viable strategy to enhance ORNJ regeneration.
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产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Jinhui Wang,Xinyuan Zhang,Fei Liang,Zhanggui Hu,Yicheng Wu
Recently, neutral cyanurate acid and negative (iso-)cyanurates (HxC3N3O3)(3–x)– (x = 0–2) with strong conjugated π-bonds have been proposed as a new possible type of structural motifs for exploring high-performance birefringent materials. Especially, ionic cocrystals (ICCs) with neutral H3C3N3O3 molecules have attracted much attention due to their extended ultraviolet transparent range and concurrently improved birefringence. Herein, three ICC single crystals, RbCl·(H3C3N3O3)2 (I), CsCl·(H3C3N3O3)2 (II), and RbBr·(H3C3N3O3)2 (III), combining cyanurate acid and alkali halides have been designed and synthesized in ethanol solution. They simultaneously exhibit wide band gaps more than 5.4 eV, large birefringence (Δnexp ≈ 0.096–0.115, Δncal ≈ 0.071–0.105 at 800 nm), and high thermal stability above 325 °C. In addition, theoretical calculations have also been performed to evaluate the relationship of the molecular arrangement and their anisotropic optical properties. This work suggests that cyanurate-based cocrystals could be a promising structural family for the discovery of ultraviolet birefringent crystals.
研究领域:
材料化学
·
光学材料
·
晶体工程
·
无机化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Man-Man Chen,Sheng-Hua Zhou,Wenbo Wei,Xin-Tao Wu,Hua Lin,Qi-Long Zhu
Despite the fact that nonlinear optical (NLO) crystals such as AgGaS2 and AgGaSe2 have been widely used in the infrared (IR) range due to their large second harmonic generation (SHG) coefficients and wide range of IR transparency windows, the small laser-induced damage threshold (LIDT) remains a great issue hindering their high-power applications. Herein, three noncentrosymmetric (NCS) chalcogenides AZn4Ga5Se12 (A = K, Rb, or Cs) are successfully obtained through an appropriate flux method after the extensive design and synthesis of the A/Zn/Ga/Q system. Single-crystal X-ray diffraction data demonstrate that they adopt trigonal space group R3 (No. 146) with three-dimensional diamond-like frameworks composed of [M9Se24] layers (M = Zn or Ga) stacking in the same direction and filled by charge-balancing A+ cations. Noticeably, they all exhibit strong powder SHG responses (2.8–3.7 × AgGaS2) and amazing LIDTs (19.2–23.4 × AgGaS2). In addition, theoretical calculations are performed to further determine the relationship between NCS structures and NLO properties. This work provides effective solutions for overcoming the trade-off between strong SHG and high LIDT in IR-NLO materials.
研究领域:
材料科学
·
光学材料
·
非线性光学
·
红外光子学
·
晶体化学
✓ 已验证
DOI
高影响因子
TOXICOLOGY
·
2023
·
IF 4.5
Miao Zhang,Xiaowen Bi,Shuai Liu,Yu Liu,Qiyu Wang
Sodium p -perfluorous nonenoxybenzene sulfonate (OBS), an economical alternative to perfluorooctane sulfonate (PFOS) in multiple industrial fields, is widely detected in the environment. The toxicity of OBS has received increasing attention. Pituitary cells are components of the endocrine system and act as vital regulators of homeostatic endocrine balance. However, the effects of OBS on pituitary cells remain unknown. The present study explores the effects of OBS (0.5, 5, and 50 μM) on GH3 rat pituitary cells after treatment for 24, 48, and 72 h. We found that OBS significantly inhibited cell proliferation in GH3 cells with remarkable senescent phenotypes, including enhanced SA-β-gal activity and expression of senescence-associated secretory phenotype (SASP)-related genes, cell cycle arrest, and upregulation of the senescence-related proteins γ-H2A.X and Bcl-2. OBS caused significant cell cycle arrest of GH3 cells at the G1-phase and concomitantly downregulated the expression of some key proteins for the G1/S transition, including cyclin D1 and cyclin E1. Consistently, the phosphorylation of retinoblastoma (RB), which plays a central role in regulating the cell cycle, was prominently reduced after OBS exposure. Furthermore, OBS notably activated the p53-p21 signalling pathway in GH3 cells, as evidenced by increased p53 and p21 expressions, enhanced p53 phosphorylation, and augmented p53 nuclear import. To our knowledge, this study is the first to reveal that OBS triggers senescence in pituitary cells via the p53-p21-RB signalling pathway. Our study demonstrates a novel toxic effect of OBS in vitro, and provides new perspectives for understanding the potential toxicity of OBS.
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产品关联
DOI
PubMed
高影响因子
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