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Journal of Wuhan University of Technology(Materials Science) 2017年第1期32卷 85-88页

作者：朱科 YANG Ye LI Jia song weijie Department of Physics and Mathematics Hunan Institute of Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences

Al-doped zinc oxide（AZO） and Ga-doped zinc oxide（GZO） thin films with the same doping concentration（3.6 at%） were deposited on glass substrates at room temperature by direct current（DC） magnetron ***,we comparatively studied the doped thin films on the basis of their structural,morphological,electrical,and optical properties for optoelectronic *** thin films exhibited excellent optical properties with more than 85%transmission in the visible *** GZO thin film had better crystallinity and smoother surface morphology than the AZO thin *** conductivity of the GZO thin film was improved compared to that of the AZO thin film：the resistivity decreased from 1.01×10^-3 to 3.5×10^-4 Ω cm,which was mostly due to the increase of the carrier concentration from 6.5×10^20 to 1.46×10^21cm^-*** results revealed that the GZO thin film had higher quality than the AZO thin film with the same doping concentration for optoelectronic applications.

关键词： room temperature ZnO thin films sputtering electrical properties

Separation of Silver Nanocrystals for Surface-enhanced Raman Scattering Using Density Gradient Centrifugation

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Journal of Materials Science & Technology 2015年第8期31卷 834-839页

作者： Qijin Huang Wenfeng Shen Ruiqin Tan Wei Xu weijie song Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences Faculty of Information Science and Engineering Ningbo University

One-dimensional silver nanocrystals （AgNCs） have been prepared by a polyol process using sodium hydroxide and nitric acid at a constant silver source concentration. Results indicate that the acidity- basicity plays an important role in silver-nanocrystal formation. Different morphologies of AgNCs were synthesized by changing the NaOH or HNO3 amount. We demonstrate that nearly monodisperse silver nanocrystals can be separated from polydisperse samples using density gradient centrifugation separation （DGCS）. We also demonstrate that the separated AgNCs can be used as substrates for surface- enhanced Raman scattering （SERS） spectroscopy. The separation approach provides a method of improving the nanocrystal quality produced by large-scale synthetic methods.

关键词： Silver Raman scattering Nanomaterials Separation efficiency

17.13% Efficiency and Superior Thermal Stability of Organic Solar Cells Based on a Comb-Shape Active Blend

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Energy & Environmental Materials 2023年第6期6卷 266-272页

作者： Zhipeng Yin Qingjie Wang Huan Zhao Haiqiao Wang Ning Li weijie song School of Materials Science and Engineering NingboTech UniversityNingbo 315100China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and DevicesSchool of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

With rapid progress,organic solar cells(OSCs)are getting closer to the target of real ***,the stability issue is still one of the biggest challenges that have to be ***,the thermal stability of OSCs is far from meeting the requirements of the ***,based on the layer-by-layer(LBL)process and by utilizing the dissolubility nature of solvent and materials,binary inverted OSCs(ITO/AZO/PM6/BTP-eC9/MoO3/Ag)with comb shape active morphology are *** efficiency of 17.13%and simultaneous superior thermal stability(with 93%of initial efficiency retained in~9:00 h under 85℃in N_(2))are demonstrated,showing superior stability to reference *** enhancements are attributed to the formed optimal comb shape of the active layer,which could provide a larger D/A interface,thus more charge carriers,render the active blend a more stable morphology,and protect the electrode by impeding ion's migration and *** the best of our knowledge,this is the best thermal stability of binary OSCs reported in the literature,especially when considering the high efficiency of over 17%.

关键词： comb-shape blend high efficiency organic solar cell thermal stability

Effective Surface Treatment for High‑Performance Inverted CsPbI2Br Perovskite Solar Cells with Efficiency of 15.92%

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Nano-Micro Letters 2020年第12期12卷 133-145页

作者： Sheng Fu Xiaodong Li Li Wan Wenxiao Zhang weijie song Junfeng Fang Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physics and Electronics Science Engineering Research Center of Nanophotonics&Advanced InstrumentMinistry of EducationEast China Normal UniversityShanghai 200241People’s Republic of China

Developing high-efficiency and stable inverted CsPbI2Br perovskite solar cells is vitally urgent for their unique advantages of removing adverse dopants and compatible process with tandem cells in comparison with the ***,relatively low opening circuit voltage(Voc)and limited moisture stability have lagged their progress far from the ***,we propose an effective surface treatment strategy with high-temperature FABr treatment to address these *** induced ions exchange can not only adjust energy level,but also gift effective ***,the gradient distribution of FA+can accelerate the carriers transport to further suppress bulk ***,the Br-rich surface and FA+substitution can isolate moisture *** a result,the optimized devices show champion efficiency of 15.92%with Voc of 1.223 *** addition,the tolerance of humidity and operation get significant promotion:maintaining 91.7%efficiency after aged at RH 20%ambient condition for 1300 h and 81.8%via maximum power point tracking at 45°C for 500 h in ***,the unpackaged devices realize the rare reported air operational stability and,respectively,remain almost efficiency(98.9%)after operated under RH 35%for 600 min and 91.2%under RH 50%for 300 min.

关键词： CsPbI2Br Inverted perovskite solar cells Effective passivation Voc loss Stability

Fabrication of Flexible Transparent Conductive Films with Silver Nanowire by Vacuum Filtration and PET Mold Transfer

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Journal of Materials Science & Technology 2016年第2期32卷 158-161页

作者： Wei Xu Qingsong xu Qijin Huang Ruiqin Tan Wenfeng Shen weijie song Ningbo Institute of Material Technology and Engineering Chinese Academy of SciencesNingbo 315201China Ningbo Key Laboratory of Silicon and Organic Thin Film Optoelectronic Technologies Ningbo 315201China Faculty of information Science and Engineering Ningbo UniversityNingbo 315211China

The flexible transparent conductive films （FrCFs） of silver nanowire-polyethylene terephthalate （AgNW- PET） were prepared by a facile method including vacuum filtration and mold transferring. The effect of silver nanowire weight density on the optical and electrical properties of films, as well as the electrical percolation was investigated. The obtained typical AgNW-PET film exhibited high figure of merit of 31.3 × 10^-3 Ω^-1 with low sheet resistance of 4.95 D sq^-1 and high transparency at 550 nm of 83.0% （excluding PET substrate）. The resulting FTCFs based on PET substrate with high transmittance and low sheet resistance have a great potential in the application of high-performance flexible electronics and photovoltaic devices.

关键词： Silver nanowires Nanoparticles Percolation threshold Transparent conductive film

Low Temperature Synthesis of Nano Porous 12CaO?7Al_2O_3 Powder by Hydrothermal Method

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Journal of Wuhan University of Technology(Materials Science) 2016年第6期31卷 1201-1205页

作者： Karim Khan 李佳 ZOU Wenwei XU Wei YANG Ye song weijie Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences

Single-phase insulating 12CaO？7Al_2O_3（C12A7） powder was synthesized using an optimized hydrothermal method. Pure phase of C12A7 was got at a comparatively lower temperature（c.a. 300 ℃） than that has been previously reported. The crystallite size of the synthesized C12A7 powder was 7±2 nm. The surface area values calculated for all the samples at a synthesis temperature range of 250-800 ℃ for 5 h were in the range of about 19-24 m^2/g, with pore sizes of 12-20 nm. This low-temperature-based synthetic strategy along with nano porous structures and a high surface area value can facilitate catalyst application.

关键词： C12A7 hydrothermal method low temperature nano pore

Preparation of AZO Nanoparticles, Ceramic Targets and Thin Films by a Co-precipitaition Method

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Journal of Wuhan University of Technology(Materials Science) 2015年第6期30卷 1134-1139页

作者：修三木 WEI Tiefeng YANG Ye ZHANG Ting 李佳 song weijie School of Electrical Engineering Beijing Jiaotong University Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences

We comprehensively study the co-precipitation preparation of aluminum doped zinc oxide（AZO） nanoparticles, ceramic target and thin fi lm deposition. The nanoparticles calcined below 700 ℃ possessed pure wurtzite structure of ZnO. When the calcination temperature exceeded 700 ℃, ZnAl2O4 phase appeared. The resistivity and relative density of the AZO target pressed from nanoparticles were 3×10^-3 Ω·cm and 99.1%, respectively. The minimum resistivity of AZO thin films prepared by DC sputtering of the ceramic target reached 4.1×10^-4Ω·cm with the mobility of 33 cm^2/v·s and the carrier concentration of 4.5 ×10^20 cm^-3. The average optical transmittance of the AZO thin films in the visible wavelength range（400-800 nm） was more than 80%.

关键词： co-precipitation AZO electrical properties optical properties

Selective synthesis of SnO_2 hollow microspheres and nano-sheets via a hydrothermal route

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Chinese Science Bulletin 2010年第7期55卷 581-587页

作者： LI Yue GUO YanQun TAN RuiQin CUI Ping LI Yong song weijie Ningbo Institute of Material Technology and Engineering Chinese Academy of Seiences Ningbo 315201 China College of Information Science andEngineering Ningbo University Ningbo 315211 China

We report a mild template-free hydrothermal route for selective synthesis of SnO2 hollow microspheres and nano-sheets using SnCl2 and NaOH as initial *** switching the solvent from water to ethanol,the formed SnO2 nanostructures changed from nano-sheets to hollow *** obtained nano-sheets were single crystalline in *** the basis of the characterization of intermediate products,the formation of SnO2 hollow microspheres was ascribed to a crystal growth process,while the formation of SnO2 nano-sheets was ascribed to the oxidation of SnO2 sheets during the hydrothermal *** characterization of the SnO2 hollow microspheres and nano-sheets by X-ray photoelectron spectroscopy and UV-Vis absorption spectroscopy reveals different optical absorption properties and valence band electronic *** addition,the SnO2 nano-sheets and hollow microspheres exhibit different sensing *** present work provides a facile and simple template-free method for the synthesis of nano-structured SnO2.

关键词：纳米氧化锡选择性合成空心微球 SnO2 水热法 X射线光电子能谱晶体生长过程纳米结构

High-performance Sb:SnO_2 Compact Thin Film Based on Surfactant-free and Binder-free Sb:Sn_3O_4 Suspension

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Journal of Materials Science & Technology 2015年第8期31卷 815-821页

作者： Junhua Zhao Ruiqin Tan Ye Yang Wei Xu Jia Li Wenfeng Shen Guoqiang Wu Xufeng Yang weijie song College of Chemical and Material Engineering Quzhou University Faculty of Information Science and Engineering Ningbo University Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences

Surfactant-free and binder-free antimony-doped tin oxide （ATO） transparent conducting thin films were fabricated through spin coating and rapid annealing processes, in which nanosheets were assembled into a compact structure via self-contracting high pressure. The mechanism of this compact thin film for- mation was further proposed and analyzed. The compact ATO thin film had a low root mean square （RMS） roughness of 5.03 nm. This surfactant-free and binder-free compact ATO thin film delivered low resistivity of 3.04 × 10^-2 Ω cm, stable resistivity which only increased 13% after exposing in 65% RH air for half a month, high transmittance of 92.70% at 550 nm, and high band gap energy of 4.07 eV. This effective strategy will provide new insight into the synthesis of low-cost and high-performance compact thin films.

关键词： Antimony doped tin oxide Compact thin film Sn3O4 suspension Electrical properties Optical properties

Robust ultrathin and transparent AZO/Ag-SnOx/AZO on polyimide substrate for flexible thin film heater with temperature over 400℃

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Journal of Materials Science & Technology 2020年第13期47卷 156-162页

作者： Zhaozhao Wang Jia Li Junjun Xu Jinhua Huang Ye Yang Ruiqin Tan Guofei Chen Xingzhong Fang Yue Zhao weijie song School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Faculty of Information and Computer Science Ningbo UniversityNingbo 315211China Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou 213164China

We developed flexible and transparent thin film heaters(TFHs)with a structure of AZO/AgSnOx/AZO/polyimide(PI)which exhibited superior stability under operational *** and robust doped silver(Ag)films were produced by introducing a small amount of SnOx during the sputtering *** AZO/Ag-SnOx/AZO stacks showed the best figure of merit value of 139.9,which was higher than that of ITO counterpart(25.5)with the same *** addition,it exhibited excellent durability,which showed unaffected optical and electrical properties under the heat treatment of 500℃for 30 min in air,highly-accelerated tempe ratu re and humidity stress test(HAST)at 121℃and 97%RH for 36 h,10,000 times of scratching and 1500 times of inner and outer bending ***,the TFHs based on AZO/Ag-SnOx/AZO/PI achieved a high temperature of 438.8℃with response time in several seconds,which outperformed most previous *** robust high-temperature TFHs in this research hold promising commercial applications in flexible and high temperature occasions.

关键词： Ultrathin Ag films SnOx Doping Durability High temperature thin film heater