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Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

Journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao Shi Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University key laboratory of Photoelectronic Thin Film devices and Technology of Tianjin Haihe laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Inverted inorganic perovskite solar cells Flexible molecules Strain release Crystallization Energy barrier High PCE

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In situ polymerization of poly(3,4-ethylenedioxythiophene)protective layer towards stable zinc anode

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Nano Research 2025年第1期18卷 382-394页

作者： Debin Luo Peng Zhou Xiaowei Lv Panpan Sun Xiaohua Sun Hewei Zhao College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Hubei Three Gorges laboratory Yichang 443007China School of Chemistry Beihang UniversityBeijing 100191China

Aqueous zinc-ion devices are considered promising candidates for energy storage due to their high safety,low cost and relatively high energy ***,the dendrite growth,hydrogen evolution reaction(HER)and corrosion of the zinc anode significantly limit the development of Zn-ion ***,an inexpensive poly(3,4-ethylenedioxythiophene)(PEDOT)protective layer was constructed in situ on the Zn surface using electropolymerization to suppress dendrite growth and side reactions,thereby enhancing the reversibility of *** and theoretical calculations revealed that this hydrophilic protective layer promotes the desolvation process of hydrated Zn^(2+)and facilitates the transport of zinc ions,thus improving the thermodynamic and kinetic properties of Zn^(2+)deposition and inhibiting interfacial side ***,the optimized PEDOT@Zn symmetric battery exhibited a cycling stability exceeding 1250 h at 0.5 mA·cm^(-2)and 0.25 mAh·cm^(-2),with a significantly reduced overpotential(from 91.8 to 35 mV).With the assistance of the PEDOT protective layer,the PEDOT@Zn//Cu battery maintained approximately 99.5%Coulombic efficiency after 450 ***-situ scanning electron microscopy(SEM)and in situ optical microscopy characterizations further confirmed that the PEDOT protective layer can effectively suppress the growth of zinc ***,the Zn-ion capacitors assembled by the PEDOT@Zn and activated carbon also demonstrated outstanding cycling stability.

关键词： zinc-ion devices zinc anode poly(3 4-ethylenedioxythiophene)(PEDOT) dendrite desolvation process

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Surfing the nano-wave:Emerging trends in cancer diagnostics and therapy

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Nano Research 2025年第1期18卷 520-544页

作者： Genping Fu Yuting Weng Yunfan Li Carl Ho Yiyu Fu Wenxuan Wang Songbin Fu Wenjing Sun Jie Lin Xiaoyu Fan Binbin Jia Mengdi Cai Linlin Li laboratory of Medical Genetics Harbin Medical UniversityHarbin 150081China key laboratory of Preservation of Human Genetics Resources and Disease Control in China(Harbin Medical University) Ministry of EducationHarbin 150081China Beijing key laboratory for Optical Materials and Photonic devices Department of ChemistryCapital Normal UniversityBeijing 100048China College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Washington University School of Medicine in St.Louis St.LouisMO 63110USA Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Aix-Marseille College Wuhan University of TechnologyWuhan 430070China

Facing the growing global challenge posed by cancer,the quest for more accurate and potent cancer diagnostic and therapeutic strategies continues to require a multidisciplinary integration *** review firstly summarizes various types of nanoparticles in cancer ***,it offers a comprehensive overview of signalenhancing techniques for visualizing in situ tumors,along with multimodal diagnostic methods for detecting *** for tumor therapy,cutting-edge drug delivery methods that can cross biological barriers and the pinpoint targeting of tumor lesions for precise medical intervention are *** the domain of therapeutic diagnostics,we elucidate the theoretical underpinnings and structural paradigms that underlie a spectrum of advanced diagnostic and therapeutic ***,we present a compendium of publications delineating the clinical applications of each nano-based theragnostic integration ***,this comprehensive review discusses the safety concerns pertaining to the clinical application of nanoparticles and proposes some strategic recommendations to enhance the precision and safety of theragnostic-guided,nanotechnology-based clinical practices.A deeper understanding of nanomaterials,together with intimate interdisciplinary collaborations,nano-wave will most probably guide human beings to win the battle against cancers.

关键词： nanoparticles drug delivery gastric cancer glioma glioblastoma

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Accelerated design of lead-free high-performance piezoelectric ceramics with high accuracy via machine learning

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Journal of Advanced Ceramics 2023年第7期12卷 1389-1405页

作者： Wei Gu Bin Yang Dengfeng Li Xunzhong Shang Zhiyong Zhou Jinming Guo key laboratory of Green Preparation and Application for functional Materials Ministry of EducationSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China key laboratory of inorganic functional Materials and devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China

The piezoelectric performance serves as the basis for the applications of piezoelectric *** ability to rapidly and accurately predict the piezoelectric coefficient(d_(33))is of much practical importance for exploring high-performance piezoelectric *** this work,a data-driven approach combining feature engineering,statistical learning,machine learning(ML),experimental design,and synthesis is trialed to investigate its accuracy in predicting d_(33) of potassium-sodium-niobate(K,Na)NbO_(3),KNN)-based *** atomic radius(AR),valence electron distance(DV)(Schubert),Martynov-Batsanov electronegativity(EN-MB),and absolute electronegativity(EN)are summarized as the four most representative features in describing d_(33) out of all 27 possible features for the piezoelectric *** four features contribute greatly to regression learning for predicting d_(33) and classification learning for distinguishing polymorphic phase boundary(PPB).The ML method developed in this work exhibits a high accuracy in predicting d_(33) of the piezoelectric *** example of KNN combined with 6 mo1%LiNbO_(3)demonstrates d_(33)3 of 184 pC/N,which is highly consistent with the predicted *** work proposes a novel feature-oriented guideline for accelerating the design of piezoelectric ceramic systems with large d_(33),which is expected to be widely used in other functional materials.

关键词： machine learning(ML) piezoelectric ceramics piezoelectric properties perovskite regression learning

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The Observation of Martensite and Magnetic Domain Structures in Ni_(53)Mn_(24)Ga_(23) Shape Memory Alloys by Scanning Electron Acoustic Microscopy and Scanning Thermal Microscopy

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Chinese Physics Letters 2012年第5期29卷 70-73页

作者： ZHAO Kun-Yu ZENG Hua-Rong SONG Hong-Zhang HUI Sen-Xing LI Guo-Rong YIN Qing-Rui key laboratory of inorganic functional Materials and devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050 School of Physical Engineering and Material Physics laboratory Zhengzhou UniversityZhengzhou 450052

We present observations of martensite variants and ferromagnetic domain structures of Ni_(53)Mn_(24)Ga_(23) ferromagnetic shape memory alloys with a pure tetragonal martensitic phase by using scanning electron aconstic microscopy (SEAM) and scanning thermal microscopy (SThM).Electron acoustic images show a polycrystalline morphology with martensite *** coincidence between crystallographic martensitic twin variants and magnetic domains is found.A domain-like structure,obtained by SThM,is firstly reported,and then confirmed by magnetic force microscopy (MFM).The experimental results will be helpful for investigating the local thermal properties of ferromagnets and understanding the relationship between martensite variants and magnetic domains.

关键词： martensite martensitic Electron

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SrGa_(12)O_(19):The first low-ε_(r) Ga-based microwave dielectric ceramic with anomalous positiveτ_(f)

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Journal of Advanced Ceramics 2024年第9期13卷 1432-1441页

作者： Yang Yang Weishuang Fang Huixing Lin Jie Li Huaicheng Xiang Ying Tang Lei Li Liang Fang Guangxi Universities key laboratory of Non-ferrous Metal Oxide Electronic functional Materials and devices and Guangxi Key Laboratory of Optical and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China key laboratory of inorganic functional Material and devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China laboratory of Dielectric Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310058China

Dielectric ceramics with low permittivity(ε_(r)),high quality factor(Q×f),and near-zero resonant frequency(τ_(f))in the microwave bands are key materials used in fifth/sixth-generation(5G/6G)telecommunication,whileτ_(f) of most low-εr microwave dielectric ceramics is relatively *** this work,the first low-εr Ga-based ceramic SrGa_(12_O_(19) with an anomalous positiveτ_(f) was reported,and the causes of the positiveτ_(f),intrinsic polarization,and loss mechanism were systematically studied.X-ray diffraction(XRD)and transmission electron microscopy(TEM)revealed that the SrGa_(12_O_(19) ceramic formed a pure hexagonal magnetoplumbite structure with spinel blocks and rock-salt blocks stacked along the crystallographic *** sintered at 1430℃,it possessed the optimal microwave dielectric properties of a lowεr of 14.46,high Q×f of 64,705 GHz,and exceptional positiveτ_(f) of+55.7 ppm/℃,along with a low linear thermal expansion coefficient(αL)of 11.617 ppm/℃.The large positive deviation betweenεr andεr(C–M)of 45.31%resulted from the rattling effect of atoms in the rock-salt *** unique positiveτ_(f)(+55.7 ppm/℃)was governed by the rattling effect,resulting in a positiveταm(the temperature coefficient of ion polarizability)of 8.489 ppm/℃ and a large negative temperature coefficient of permittivity(τε)of−132.864 ppm/℃.Phillips–Vechten–Levine(P–V–L)chemical bond theory revealed greater contributions of the spinel block to bond ionicity(fi,52.95%),permittivity(ε,55.15%),bond energy(E,56.87%),and lattice energy(U,74.88%)than those of the rock-salt *** intrinsic dielectric properties were analyzed using infrared(IR)reflectivity *** favorable performance of the SrGa_(12_O_(19) ceramic indicated that it is a novelτ_(f) *** selection of compounds with different structural layer combinations provides a new idea for exploring excellent microwave dielectric ceramics.

关键词： magnetoplumbite microwave dielectric properties rattling effect chemical bond theory

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Potential Barrier Behavior of BaTiO3-(Bi0.5Na0.5)TiO3 Positive Temperature Coefficient of Resistivity Ceramic

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Chinese Physics Letters 2015年第4期32卷 90-93页

作者：冷森林石维李国荣郑嘹赢 Institute of Physics and Electronics Engineering Tongren University Tongren 554300 key laboratory of inorganic functional Materials and devices Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050

High-Curie-temperature （Tc） lead-free Y-doped 90 mol%BaTiO3-1O mol%（Bi0.5Na0.5 ） TiO3 ceramic with positive temperature coefficient of resistivity （PTCR） is prepared by the conventional solid state reaction in nitrogen atmosphere. The PTCR ceramic exhibits a room-temperature resistivity （p25） of ~500Ω.cm and a high PTCR effect （maximum resistivity （ρmax）/minimum resistivity （ρmin）） of ~4.5 orders of magnitude. A capacitance- voltage approach is first employed to calculate the potential barrier （ Ф ） of the grain boundary of PTCR ceramic above Tc. It is found that the potential barrier changes from 0.17 to 0.77eV as the temperature increases from 180 to 220℃, which is very close to the predictions of the Heywang-Jonker model, suggesting that the capacitance-voltage method is valid to estimate the potential barrier of PTCR thermistor ceramics.

关键词： Potential Barrier Behavior of BaTiO3 Na Bi

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Optimizing structure for constructing a highly efficient inverted top-emitting organic light-emitting diode with stable electroluminescent spectra

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Journal of Semiconductors 2014年第2期35卷 24-27页

作者：张小文许积文王华魏斌曾华荣蒋雪茵张志林 Guangxi key laboratory of Information Materials Guilin University of Electronic Technology key laboratory of Advanced Display and System Applications Ministry of EducationShanghai University key laboratory of inorganic functional Materials and devices Shanghai Institute of CeramicsChinese Academy of Sciences

We demonstrate a highly efficient inverted top-emitting organic light-emitting diode （TOLED） having stable electroluminescent spectra and color coordination with variation of viewing angles by simply tuning the reso- nance wavelength corresponding to the free emission of the emitter. Using a doped fluorescent emitting system, the inverted TOLED exhibits an enhanced maximum current efficiency of 19 cd/A and a power efficiency of 17 lm/W, which are much higher than those （11 cd/A and 5 lm/W） of the counterpart with normal structure, although both TOLEDs behave with similar stable electroluminescent spectra characteristics. The results indicate that we provide a simple and effective method of constructing an excellent inverted TOLED for potentially practical applications.

关键词： OLED inverted structure stable electroluminescent spectrum microcavity effect

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Surface stabilized cubic phase of CsPbI_3 and CsPbBr_3 at room temperature

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Chinese Physics B 2019年第5期28卷 237-243页

作者： Feng Yang Cong Wang Yuhao Pan Xieyu Zhou Xianghua Kong Wei Ji Beijing key laboratory of Optoelectronic functional Materials & Micro-Nano devices Department of PhysicsRenmin University of China

inorganic halide perovskites CsPb X_3(X = I, Br) have attracted tremendous attention in solar cell applications. However, the bulk form of the cubic phase CsPb X_3, which offers moderate direct bandgaps, is metastable at room temperature and tends to transform into a tetragonal or orthorhombic phase. Here, our density functional theory calculation results found that the surface energies of the cubic phase are smaller than those of the orthorhombic phase, although the bulk counterpart of the cubic phase is less stable than that of the orthorhombic phase. These results suggest a surface stabilization strategy to maintain the stability of the cubic phase at room temperature that an enlarged portion of surfaces shall change the relative stability of the two phases in nanostructured CsPb X_3. This strategy, which may potentially solve the long-standing stability issue of cubic CsPb X_3, was demonstrated to be feasible by our calculations in zero-, one-, and two-dimensional nanostructures. In particular, confined sizes from few to tens of nanometers could keep the cubic phase as the most thermally favored form at room temperature. Our predicted values in particular cases, such as the zero-dimensional form of CsPbI_3,are highly consistent with experimental values, suggesting that our model is reasonable and our results are reliable. These predicted critical sizes give the upper and lower limits of the confined sizes, which may guide experimentalists to synthesize these nanostructures and promote likely practical applications such as solar cells and flexible displays using CsPb X_3 nanostructures.

关键词： inorganic perovskite solar cell thermal stability surface energy nanowire quantum dot nanoplate

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One-dimension carbon self-doping g-C3N4 nanotubes： Synthesis and application in dye-sensitized solar cells

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Nano Research 2018年第3期11卷 1322-1330页

作者： Xue Li Kai Pan Yang Qu Guofeng Wang key laboratory of functional inorganic Material Chemistry Ministry of Education School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China

One-dimensional carbon self-doping g-C3N4 nanotubes （CNT） with abundant communicating pores were synthesized via thermal polymerization of saturated or supersaturated urea inside the framework of a melamine sponge for the first time. A - 16% improvement in photoelectric conversion efficiency （η） is observed for the devices fabricated with a binary hybrid composite of the obtained CNT and TiO2 compared to pure TiO2 device. The result of EIS analysis reveals that the interfacial resistance of the TiO2-dye｜ I3^-/I- electrolyte interface of TiO2-CNT composite cell is much lower than that of pure TiO2 cell. In addition, the TiOa-CNT composite cell exhibits longer electron recombination time, shorter electron transport time, and higher charge collection efficiency than those of pure TiO2 cell. Systematic investigations reveal that the CNT boosts the light harvesting ability of the photovoltaic devices by enhancing not only the visible light absorption but also the charge separation and transfer.

关键词： g-C3N4 nanotube photoelectric conversion solar cells

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