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ion doping simultaneously increased the carrier density and modified the conduction type of Sb_(2)Se_(3) thin films towards quasi-homojunction solar cell

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Journal of Materiomics 2021年第6期7卷 1324-1334页

作者： Guangxing Liang Xingye Chen Donglou Ren Xiangxing Jiang Rong Tang Zhuanghao Zheng Zhenghua Su Ping Fan Xianghua Zhang Yi Zhang Shuo Chen Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China Univ Rennes CNRSISCR(Institut des Sciences Chimiques de Rennes)UMR 6226F-35000RennesFrance Tianjin Key Laboratory of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage CenterNankai UniversityTianjin300350China

Antimony selenide(Sb_(2)Se_(3))has drawn tremendous research attentions in recent years as an environment-friendly and cost-efficient photovoltaic material.However,the intrinsic low carrier density and electrical conductivity limited its scope of applications.In this work,an effective ion doping strategy was implemented to improve the electrical and photoelectrical performances of Sb_(2)Se_(3) thin films.The Sn-doped and I-doped Sb_(2)Se_(3) thin films with controllable chemical composition can be prepared by magnetron sputtering combined with post-selenization treatment based on homemade plasma sintered targets.As a result,the Sn-doped Sb_(2)Se_(3) thin film exhibited a great increase in carrier density by several orders of magnitude,by contrast,a less increase with one order of magnitude was achieved for the Idoped Sb_(2)Se_(3) thin film.Additionally,such cation or anion doping could simultaneously modify the conduction type of Sb_(2)Se_(3),enabling the first fabrication of a substrate structured Sb_(2)Se_(3)-based quasihomojunction thin film solar cell with configuration of Mo/Sb_(2)Se_(3)-Sn/Sb_(2)Se_(3)-I/ITO/Ag.The obtained power conversion efficiency exceeding 2%undoubtedly demonstrated its attractive photovoltaic application potential and further investigation necessity.

关键词： Sb_(2)Se_(3) Thin film ion doping Carrier density Quasi-homojunction solar cell

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Li+&Ag+ and Li+&Cd2+ double-ion-doping strategy to improve the efficiency of Cu2ZnSn(S,Se)4 solar cells

Li+&Ag+ and Li+&Cd2+ double-ion-doping strategy to improve t...

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第七届新型太阳能电池材料科学与技术学术研讨会

作者： Junye Tong Gang Wang Daocheng Pan Lingling Wang Xintong Zhang Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology of Ministry of EducationNortheast Normal University State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

ion doping strategy is a promising method to enhance the efficiency of CuZnSn(S,Se)(CZTSSe) solar cells,however,most of the reported works focus on studying the single ion doping in CZTSSe absorber layers.Here,Li&Agand Li&Cd double-ion-doping strategy are applied to improve the microstructure and device performances.We found that the double-ion-doping strategy can obviously increase the grain size,reduce the thickness of fine-grain layers and enhance the device performances.Furthermore,the PCEs of Li&Agand Li&Cd doped CZTSSe solar cells are up to 8.87 % and 8.39 %,respectively.It shows an encouraging improvement of over 43.5 % and 35.8 % enhancement compared with the traditional method(6.18 %),and significantly higher than single ion doping strategy(7.60 %,7.99 % and 7.11 % for Li,Ag,and Cd doped CZTSSe solar cells).This work provides a new solution to improve the microstructure and device performances of CZTSSe solar cells.

关键词： Kesterite Solar cell ion doping Thin film Solution process

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Synergistic effect of V_(2)O_(5)and Bi_(2)O_(3) on the grain boundary structure of high-frequency NiCuZn ferrite ceramics

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Journal of Advanced Ceramics 2022年第6期11卷 912-921页

作者： Xiuyuan FAN Guohua BAI Zhenhua ZHANG Qiming CHEN Jiaying JINa Jiafeng XUa Xuefeng ZHANG Mi YAN School of Materials Science and Engineering State Key Laboratory of Silicon MaterialsKey Laboratory of Novel Materials for Information Technology of Zhejiang ProvinceZhejiang UniversityHangzhou 310027China Institute of Advanced Magnetic Materials College of Materials&Environmental EngineeringHangzhou Dianzi UniversityHangzhou 310012China

High-frequency soft magnetic ferrite ceramics are desired in miniaturized and efficient power electronics but remain extremely challenging to deploy on account of the power loss(Pcv)at megahertz frequencies.Here,we prepared NiCuZn ferrite with superior high-frequency properties by V_(2)O_(5)and Bi_(2)O_(3)synergistic doping,which proves to be a potent pathway to reduce Pcv of the ferrite at megahertz frequencies.The sample doped with 800 ppm V_(2)O_(5)and 800 ppm Bi_(2)O_(3)yielded the most optimized magnetic properties with a Pcv of 113 kW/m^(3)(10 MHz,5 mT,25℃),an initial permeability(μi)of 89,and a saturation induction(Bs)of 340 mT,which is at the forefront of the reported results.These outstanding properties are closely related to the notable grain boundary structure,which features a new type of nano-Bi_(2)Fe_(4)O_(9)phase around ferrite grains and a Ca/Si/V/O amorphous layer.Our results indicate great strides in correlating the grain boundary structure with multiple-ion doping and set the scene for the developing high-frequency soft magnet ferrites.

关键词： NiCuZn ferrite megahertz application grain boundary Bi_(2)Fe_(4)O_(9) ion doping

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Cubic multi-ions-doped Na_(2)TiO_(3) nanorod-like coatings:Structure-stable,highly efficient platform for ions-exchanged release to immunomodulatory promotion on vascularized bone apposition

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Bioactive Materials 2022年第12期7卷 72-90页

作者： Dongmei Yu Bo Li Meng Yu Shuo Guo Zheng Guo Yong Han a State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049ShaanxiChina Department of Orthopaedics Tangdu HospitalFourth Military Medical UniversityXi’an710038ShaanxiChina

The dissolution-derived release of bioactive ions from ceramic coatings on metallic implants,despite improving osseointegration,renders a concern on the interfacial breakdown of the metal/coating/bone system during longterm service.Consequently,persistent efforts to seek alternative strategies instead of dissolution-derived activation are pressingly carrying out.Inspired by bone mineral containing ions as Ca2+,Mg2+,Sr2+and Zn2+,here we hydrothermally grew the quadruple ions co-doped Na2TiO3 nanorod-like coatings.The co-doped ions partially substitute Na+in Na2TiO3,and can be efficiently released from cubic lattice via exchange with Na+in fluid rather than dissolution,endowing the coatings superior long-term stability of structure and bond strength.Regulated by the coatings-conditioned extracellular ions,TLR4-NFκB signalling is enhanced to act primarily in macrophages(MΦs)at 6 h while CaSR-PI3K-Akt1 signalling is potentiated to act predominately since 24 h,triggering MΦs in a M1 response early and then in a M2 response to sequentially secrete diverse cytokines.Acting on endothelial and mesenchymal stem cells with the released ions and cytokines,the immunomodulatory coatings greatly promote Type-H(CD31hiEmcnhi)angiogenesis and osteogenesis in vitro and in vivo,providing new insights into orchestrating insoluble ceramics-coated implants for early vascularized osseointegration in combination with long-term fixation to bone.

关键词： Nanorod-like coating ion doping Sodium titanate Immunomodulation Angiogenesis Osseointegration

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Composition engineering to obtain efficient hybrid perovskite light-emitting diodes

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Frontiers of Optoelectronics 2020年第3期13卷 282-290页

作者： Chuanzhong YAN Kebin LIN Jianxun LU Zhanhua WEI These authors contributed equally to this work.Institute of Luminescent Materials and Information Displays College of Materials Science and EngineeringHuaqiao UniversityXiamen 361021China

Metal halide perovskites have received considerable attention in the field of electroluminescence,and the external quantum efficiency of perovsk'c lightemitting diodes has exceeded 20%.CH3NH3PbBr3 has been intensely investigated as an emitting layer in perovskite light-emitting diodes.However,perovskite films comprising CH3NH3PbBr3 often exhibit low surface coverage and poor crystallinity,leading to high current leakage,severe nonradiative recombination,and limited device performance.Herein,we demonstrate a rationale for composition engineering to obtain high-quality perovskite films.We first reduce pinholes by adding excess CH3NH3B1 to the actual CH3NH3PbBr3 films,and we then add CsBr to improve the crystalline quality and to passivate nonradiative defects.As a result,the(CH3NH3)1-xCSxPbBx based perovskite light-emitting diodes exhibit significantly improved external quantum and power efficiencies of 6.97%and 25.181m/W,respectively,representing an improvement in performance dozens of times greater than that of pristine CH3NH3PbBr3-based perovskite light-emitting diodes.Our study demonstrates that composition engineering is an effective strategy for enhancing the device performance of perovskite light-emitting diodes.

关键词： perovskite light-emitting diode(LED) composition engineering ion doping

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微流控反应器中连续流动合成掺杂型全无机钙钛矿纳米晶及其在发光二极管中的应用

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Science China Materials 2020年第8期63卷 1526-1536页

作者：林鹏程陈虹滨魏崭林映汝林景辉陈颖成正东 Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and EnergyGuangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Artie McFerrin Department of Chemical Engineering Texas A&M UniversityCollege StationTexas 77843-3122USA

全无机钙钛矿纳米晶具有发射光谱窄、发光量子效率高和发光波长可调等优点,在光电子材料和器件领域具有广阔的应用前景.离子掺杂可以调节其原始的晶体结构和发光性能,或者赋予其额外的功能.本文设计了一种基于连续流动反应制备Ce3+掺杂... 详细信息

全无机钙钛矿纳米晶具有发射光谱窄、发光量子效率高和发光波长可调等优点,在光电子材料和器件领域具有广阔的应用前景.离子掺杂可以调节其原始的晶体结构和发光性能,或者赋予其额外的功能.本文设计了一种基于连续流动反应制备Ce3+掺杂的全无机钙钛矿纳米晶的微流控反应器.流动合成Ce3+掺杂全无机钙钛矿纳米晶的机理是前驱体离子在限域微通道中的有效物理混合、晶种在不良溶剂中的反应成核以及全无机钙钛矿纳米晶沿着流动方向的晶体生长.利用光纤式吸收光谱仪和光纤式荧光光谱仪可以对合成过程进行在线监测.通过改变微流控反应器的流动参数,可以便捷地控制Ce3+的掺杂浓度,最高可达1%.Ce3+掺杂可以提高全无机钙钛矿纳米晶的光致发光效率和稳定性.Ce3+掺杂的CsPbBr3全无机钙钛矿纳米晶可用于制造色纯度高达93.3%的绿色发光二极管,以及色温为10,436 K、CIE色坐标为(0.261,0.317)、显色指数(CRI)为72.1的白色发光二极管.微流控反应器连续可控合成全无机钙钛矿纳米晶为高性能光电材料和器件的应用开辟了新途径.

关键词： all-inorganic perovskite nanocrystals microfluidics ion doping light-emitting diode

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doping suppresses lattice distortion of vacant quadruple perovskites to activate self-trapped excitons emission

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Nano Research 2024年第4期17卷 3068-3078页

作者： Zhipeng Chen Fei Zhang Dongwen Yang Huifang Ji Xu Chen Di Wu Xinjian Li Yu Zhang Zhifeng Shi Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

The vacancy-ordered quadruple perovskite Cs_(4)CdBi_(2)Cl_(12),as a newly-emerging lead-free perovskite system,has attracted great research interest due to its excellent stability and direct band gap.However,the poor luminescence performance limits its application in light-emitting diodes(LEDs)and other fields.Herein,for the first time,an Ag^(+)ion doping strategy was proposed to greatly improve the emission performance of Cs_(4)CdBi_(2)Cl_(12) synthesized by hydrothermal method.Density functional theory calculations combined with experimental results evidence that the weak orange emission from Cs_(4)CdBi_(2)Cl_(12) is attributed to the phonon scattering and energy level crossing due to the large lattice distortion under excited states.Fortunately,Ag^(+)ion doping breaks the intrinsic crystal field environment of Cs_(4)CdBi_(2)Cl_(12),suppresses the crossover between ground and excited states,and reduces the energy loss in the form of nonradiative recombination.At a critical doping amount of 0.8%,the emission intensity of Cs_(4)CdBi_(2)Cl_(12):Ag^(+)reaches the maximum,about eight times that of the pristine sample.Moreover,the doped Cs_(4)CdBi_(2)Cl_(12) still maintains excellent stability against heat,ultraviolet irradiation,and environmental oxygen/moisture.The above advantages make it possible for this material to be used as solid-state phosphors for white LEDs applications,and the Commission International de I’Eclairage color coordinates of(0.31,0.34)and high color rendering index of 90.6 were achieved.More importantly,the white LED demonstrates remarkable operation stability in air ambient,showing almost no emission decay after a long working time for 48 h.We believe that this study puts forward an effective ion-doping strategy for emission enhancement of vacancy-ordered quadruple perovskite Cs_(4)CdBi_(2)Cl_(12),highlighting its great potential as efficient emitter compatible for practical applications.

关键词： Cs_(4)CdBi_(2)Cl_(12) self-trapped excitons ion doping emission enhancement stability

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Ribbon-like Cu doped V6O13 as Cathode Material for High-performance Lithium ion Batteries

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Journal of Wuhan University of Technology(Materials Science) 2017年第6期32卷 1397-1401页

作者：何金云龙飞 PENG Daijiang WU Xiaoli MO Shuyi ZOU Zhengguang Guangxi Key Laboratory of New Energy and Building Energy Saving Guilin University of Technology Guilin 541004 China KeyLaboratory of Nonferrous Materials and New Processing Technology Ministry of Education Guilin University of Technology Guilin 541004 China

Ribbon-like Cu doped V6O（13） was synthesized via a simple solvothermal approach followed by heat treatment in air.As an cathode material for lithium ion battery,the ribbon-like Cu doped V6O（13 ）electrode exhibited good capacity retention with a reversible capacity of over 313 m Ah·g^-1 for up to 50 cycles at 0.1C,as well as a high charge capacity of 306 m Ah·g^-1 at a high current rate of 1 C,in comparison to undoped V6O（13 ）electrode（267 m Ah·g^-1 at 0.1C and 273 m Ah·g^-1 at 1 C）.The high rate capability and better cycleability of the doped electrode can be attributed to the influence of the Cu ions on the mophology and the electronic conductivity of V6O（13） during the lithiation and delithiation process.

关键词： vanadium oxide ion doping cathode material lithium ion battery

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Characterization of metal doped-titanium dioxide and behaviors on photocatalytic oxidation of nitrogen oxides

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Journal of Environmental Sciences 2007年第12期19卷 1505-1509页

作者： LIU Yue WANG Hai-qiang WU Zhong-biao Department of Environmental Engineering Zhefiang University Hangzhou 310027 China.

A series of nanosized ion-doped TiO2 catalysts with different ion content （between 0.1 at.% and 1.0 at.%） have been prepared by wet impregnation method and investigated with respect to their behavior for UV photocatalytic oxidation of nitric oxide. The catalytic activity was correlated with structural, electronic and surface examinations of the catalysts using X-ray diffraction analysis （XRD）, ultraviolet-visible （UV-Vis） absorption spectroscopy, transmission electron microscopy （TEM）, energy disperse spectrometer （EDS） and high resolution-transmission electron microscopy （HR-TEM） techniques. An enhancement of the photocatalytic activity was observed for Zn2＋ doping catalyst ranged from 0.1 at.% to 1.0 at.% which was attributed to the lengthened lifetime of electrons and holes. The improvement in photocatalytic activity could be also observed with the low doping concentration of Cr^3＋（0.1 at.%）. However, the doping of Fe^3＋, Mo^6＋, Mn^2＋ and the high doping concentration of Cr^3＋ had no contribution to photocatalytic activity of nitric oxide.

关键词： NO photocatalytic oxidation ion doping doped

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Synthesis and electrochemical properties of Li_(1-x)V_xCr_yFe_(1-x)PO_4/C as a cathode material

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Chinese Chemical Letters 2008年第3期19卷 337-341页

作者： Shi Tao Song Pei Hua Ma Shi You Li Xiao Chuan Deng Chun Yan Yan Qinghai Institute of Salt Lakes Chinese Academy of Sciences Xining 810008 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Composites Li1-xVxCryFe1-yPO4/C（x=0.01, 0.02; y = 0.01, 0.02） were synthesized by solid-state reaction method. The influence of the content of doping vanadium and chromium on the structure of Li1-xVxCryFe1-yPO4/C was investigated by XRD, while the morphology of powders was observed by SEM. The investigation of the electrochemical performances showed that the Li0.99V0.01Cr0.02Fe0.98PO4/C material has a higher capacity. At 0.1 C discharging rate, it is capable of delivering reversible specific capacity of 163.8 mAh/g with fairly stable cycleability.

关键词： Li1-xVxCryFe1-yPO4/C Cathode material ion doping

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