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Effects of au nanoparticle addition to hole transfer layer in organic solar cells based on copper naphthalocyanine and fullerene

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Progress in Natural Science:Materials International 2014年第3期24卷 179-183页

作者： Akihiko Nagata Takeo Oku Tsuyoshi Akiyama Atsushi Suzuki Department of Materials Science The University of Shiga Prefecture

Organic solar cells based on copper naphthalocyanine(CuNc) and fullerene(C60) were fabricated, and their photovoltaic properties were investigated. C60 and CuNc were used as n-type and p-type semiconductors, respectively. In addition, the effect of au nanoparticle addition on a hole transfer layer was investigated, and the power conversion efficiency of the devices was improved after blending the au nanoparticles into the hole transport layer. Nanostructures of au nanoparticles were investigated by transmission electron microscopy and X-ray diffraction. Energy levels of molecules were calculated by molecular orbital calculations, and the nanostructure and electronic properties were discussed.& 2014 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.

关键词： Solar cell Copper naphthalocyanine Fullerene au nanoparticle

Study on the Electrical Conductivity of au nanoparticle/Chloroform and Toluene Suspensions

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Journal of Shanghai Jiaotong university(Science) 2005年第1期10卷 95-98页

作者：方芳张亚非 Bio-X DNA Computer Consortium Shanghai Jiaotong Univ. Shanghai 200030 ChinaKey Lab. for Thin Film and Microfabrication Technology of Ministry of Education Inst. of Micro/Nanometer Science and Technology Shanghai Jiaotong Univ. Shanghai 200030

au nanoparticles capped by hexadecanethiol and dodecanethiol were chemically synthesized. The characteristics of electrical conductivity for the capped nanoparticles dissolved in chloroform and toluene solvents were investigated. The electrical conductivity of the samples is conspicuously au nanoparticle concentration dependent. The results show that a rapid conductivity increases when the nanoparticle concentration increases from low value to a moderate value of 5.47 g/L and 11.22 g/L, which is capped by hexadecanethiol and dodecanethiol in chloroform solvent, and 2.77 g/L and 7.88 g/L in toluene solvent. The room-temperature dc conductivity σ dc of au nanoparticle capped by hexadecanethiol is smaller than that capped by dodecanethiol in the whole range of au nanoparticle concentrations. The conductivity of au nanoparticle suspensions increases almost linearly in the temperature range in above two solvents.

关键词： electrical conductivity au nanoparticle tunnel moderate value

The enhancement of 21.2%-power conversion efficiency in polymer photovoltaic cells by using mixed au nanoparticles with a wide absorption spectrum of 400 nm–1000 nm

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Chinese Physics B 2015年第4期24卷 283-289页

作者：郝敬昱徐颖张玉佩陈淑芬李兴鳌汪联辉黄维 Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University

au nanoparticles （NPs） mixed with a majority of bone-like, rod, and cube shapes and a minority of irregu- lar spheres, which can generate a wide absorption spectrum of 400 nm-1000 nm and three localized surface plas- mon resonance peaks, respectively, at 525, 575, and 775 nrn, are introduced into the hole extraction layer poly（3,4- ethylenedioxythiophene）：poly（4-styrenesulfonate）（PEDOT：PSS） to improve optical-to-electrical conversion performances in polymer photovoltaic ceils. With the doping concentration of au NPs optimized, the cell performance is significantly improved： the short-circuit current density and power conversion efficiency of the poly（3-hexylthiophene）： [6,6]-phenyl- C60-butyric acid methyl ester cell are increased by 20.54% and 21.2%, reaching 11.15 ***-2 and 4.23%. The variations of optical, electrical, and morphology with the incorporation of au NPs in the cells are analyzed in detail, and our results demonstrate that the cell performance improvement can be attributed to a synergistic reaction, including： 1） both the local- ized surface plasmon resonanceand scattering-induced absorption enhancement of the active layer, 2） au doping-induced hole transport/extraction ability enhancement, and 3） large interface roughness-induced efficient exciton dissociation and hole collection.

关键词： au nanoparticle polymer solar cells localized surface plasmon resonance scattering hole transport

Crystallinity engineering of au nanoparticles on graphene for in situ SERS monitoring of Fenton-like reaction

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Chinese Chemical Letters 2022年第3期33卷 1263-1266页

作者： Danni Guo Lixia Zhao Hui Zhang State Key Laboratory of Environmental Chemistry and Eco-toxicology Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China

Fabrication of multifunctional nanoplatform to in situ monitor Fenton reaction is of vital importance to probe the underlying reaction process and design high-performance catalyst. Herein, a hybrid catalyst comprising of single-crystalline au nanoparticles (SC au NPs) on reduced graphene oxide (RGO) sheet was prepared, which not only exhibited an excellent ^(1)O_(2) mediated Fenton-like catalytic activity in promoting rhodamine 6G (R6G) degradation by activating H_(2)O_(2), but also displayed a sensitive surface-enhanced Raman spectroscopy (SERS) detection performance to R6G with a linear response range from 1.0×10^(-8) mol/L to 1.0×10^(-5) mol/L thus providing a powerful and versatile nanoplatform for in situ SERS monitoring Fenton-like catalytic reaction. The integration of catalytic and SERS activities into a single nanostructure are expected to provide great potentials for practical applications in environmental catalysis.

关键词： au nanoparticle Crystallinity engineering Fenton-like reaction SERS monitoring Environmental remediation

Tailoring the surface structures of iron oxide nanorods to support au nanoparticles for CO oxidation

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Chinese Journal of Catalysis 2019年第12期40卷 1884-1894页

作者： Wen Shi Tongtong Gao Liyun Zhang Yanshuang Ma Zhongwen Liu Bingsen Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry&Chemical EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026AnhuiChina

Iron oxide supported au nanomaterials are one of the most studied catalysts for low-temperature CO *** performance not only critically depends on the size of the supported au nanoparticles(NPs)but also strongly on the chemical nature of the iron *** this study,au NPs supported on iron oxide nanorods with different surface properties throughβ-FeOOH annealing,at varying temperatures,were synthesized,and applied in the CO *** characterizations of the interactions between au NPs and iron oxides were obtained by X-ray diffraction,transmission electron microscopy(TEM),and X-ray photoelectron *** results indicate that the surface hydroxyl group on the au/FeOOH catalyst,before calcination(au/FeOOH-fresh),could facilitate the oxygen adsorption and dissociation on positively charged au,thereby contributing to the low-temperature CO oxidation *** calcination at 200℃,under air exposure,the chemical state of the supported au NP on varied iron oxides partly changed from metal cation to au0,along with the disappearance of the surface OH ***/FeOOH with the highest au0 content exhibits the highest activity in CO oxidation,among the as-synthesized ***,good durability in CO oxidation was achieved over the au/FeOOH catalyst for 12 h without observable *** addition,the advanced identical-location TEM method was applied to the gas phase reaction to probe the structure evolution of the au/iron oxide series of the catalysts and support structure.A au NP size-dependent Ostwald ripening process mediated by the transport of au(CO)x mobile species under certain reaction conditions is proposed,which offers a new insight into the validity of the structure-performance relationship.

关键词： Iron oxide nanorods Surface property au nanoparticle CO oxidation Structure evolution

Designing TiO_(2)/au/Prussian blue heterostructures nanorod arrays for ultra-stable cycle and ultra-fast response electrochromism

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Nano Research 2023年第2期16卷 3294-3303页

作者： Miao Xu Kang Li Shen Wang Shengyu Zhou Hulin Zhang Hongbo Xu Jiupeng Zhao Yao Li School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China School of Physics Southeast UniversityNanjing 211189China Center for Composite Materials and Structure Harbin Institute of TechnologyHarbin 150001China

Prussian blue(PB)is an anodic coloring candidate in the wide area of electrochromic(EC)***,the co-influence of weak adhesion and low electrical conductivity leads to the poor stability and slow switching *** tackle this bottleneck,a novel TiO_(2)/au/PB nanorod array is designed through hydrothermal and electrodeposition approaches on fluorine-doped tin oxide(FTO)*** a designed ternary array structure could not only increase reactive site and conductivity,but also improve ion storage capacity and promote charge transfer,attributed to the synergistic effect of TiO_(2)/au/PB core–shell heterostructure and the localized surface plasmon resonance(LSPR)effect of au ***,density functional theory(DFT)calculation confirms the strong interaction between rutile TiO_(2)and FTO substrate,which contributes to the improvement of EC cycle *** from these effects,the TiO_(2)/au/PB film shows a fast coloration/bleaching response of 1.08/2.01 s(2.17/4.48 s,PB film)and ultra-stable EC performance of 86.8%after 20,000 cycles(50%after 600 cycles,PB film).Furthermore,the high-intensity light source can be shot clearly by the designed and assembled EC iris device(ECID)with TiO_(2)/au/PB film as an EC layer,while the photograph without an ECID is blurry,confirming the feasibility of the material in portable digital products.

关键词： electrochromic Prussian blue au nanoparticle TiO_(2)nanorod array heterojunction

au cluster anchored on TiO_(2)/Ti_(3)C_(2) hybrid composites for efficient photocatalytic CO_(2) reduction

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Rare Metals 2022年第9期41卷 3045-3059页

作者： Yang Li Ya-Li Yang Gui Chen Jia-Jie Fan Quan-Jun Xiang School of Environment and Civil Engineering Dongguan University of TechnologyDongguan523808China State Key Laboratory of Electronic Thin Film and Integrated Devices School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu610054China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou313001China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

The size of metal nanoparticles is a key factor to enhance the photocatalytic activity of ***,the mechanism of this factor to the improvement of photocatalytic CO_(2) reduction performance is still ***,au cluster/TiO_(2)/Ti_(3)C_(2) and au nanoparticle/TiO_(2)/Ti_(3)C_(2) were successfully prepared by deposition-precipitation *** experimental results show that the photocatalytic CO_(2) reduction performance of au cluster/TiO_(2)/Ti_(3)C_(2) with quantum size effect is stronger than that of au nanoparticle/TiO_(2)/Ti_(3)C_(2) with surface plasmon *** enhanced photocatalytic CO_(2) reduction activity is assigned to the establishment of an overlapping orbital between the lowest unoccupied molecular orbital(LUMO)of the au cluster and the anti-bonding orbital of CO_(2),which greatly promotes the activation efficiency of CO_(2).The existence of au cluster and the mechanism of photocatalytic CO_(2) reduction performance were certified by high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM)and in situ Fourier transform infrared spectroscopy(ISFTIR).This work may open new opportunities for the establishment of stable and active metal nanocatalysts.

关键词： au cluster au nanoparticle Exciton state Photocatalytic CO_(2)reduction TiO_(2)

Orientation controlled preparation of nanoporous carbon nitride fibers and related composite for gas sensing under ambient conditions

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Nano Research 2017年第5期10卷 1710-1719页

作者： Suqin Li Zhiwei Wang Xiaoshan Wang Fangfang Sun Kai Gao Ningxian Hao Zhipeng Zhang Zhongyuan Ma Hai Li Xiao Huang Wei Huang Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergistic Innovation Centerfor Advanced Materials (SICAM) Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China

Creating pores in suprastructures of two-dimensional （2D） materials while controlling the orientation of the 2D building blocks is important in achieving large specific surface areas and tuning the anisotropic properties of the obtained functional hierarchical structures. In this contribution, we report that arranging graphitic carbon nitride （g-C3N4） nanosheets into one-dimensional （1D） architectures with controlled orientation has been achieved by using 1D oriented melem hydrate fibers as the synthetic precursor via a polycondensation process, during which the removal of water molecules and release of ammonia gas led to the creation of pores without destroying the 1D morphology of the oriented structures. The resulting porous g-C3N4 fibers with both meso- and micro-sized pores and largely exposed edges exhibited good sensing sensitivity and selectivity towards NO2. The sensing performance was further improved by hybridization of the porous fibers with au nanoparticles （au NPs）, leading to a detection limit of 60 ppb under ambient conditions. Our results suggest that the highly porous g-C3N4 fibers and the related hybrid structures with largely exposed graphitic layer edges are excellent sensing platforms and may also show promise in other electronic and electrochemical applications.

关键词： graphitic carbon nitride au nanoparticle gas sensing porous fiber chemiresistive sensor

Ultrasensitive strain gauge with tunable temperature coefficient of resistivity

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Nano Research 2016年第5期9卷 1346-1357页

作者： Lizhi Yi Weihong Jiao Changming Zhu Ke Wu Chao Zhang Lihua Qian Shuai Wang Yingtao Jiang Songliu Yuan School of Physics Huazhong University of Science and Technology Wuhan 430074 China Flexible Electronics Research Center Huazhong University of Science and Technology Wuhan 430074 China School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 China Nevada Nanotechnology Center & Department of Electrical and Computer Engineering University of Nevada Las Vegas Nevada 89154-4026 USA

We demonstrate an ultrasensitive strain gauge based on a discontinuous metal film with a record detection limit as low as 8.3 × 10^-6. Constructed by well-tunable crevices on the nanometer scale within the film, this gauge exhibits an ultrafast dynamic response to vibrations with a frequency range of 1 Hz to 10 kHz. More importantly, the temperature coefficient of resistivity （TCR） of the metal film is tunable owing to the cancellation effect caused by the possibility of tunneling across the nanoscale crevices （showing a negative temperature dependence） and the electron conduction within the metal islands （showing a positive temperature dependence）. Consequently, a nullified TCR is achievable when the crevice size can be precisely controlled. Thus, a fabrication strategy to precisely control the nanoscale crevices was developed in this study through the real-time tracking of the electrical conductivity during thermal evaporation. The ultrasensitive strain gauge with a tunable thermal drift introduces numerous opportunities for precision devices and wearable electronics with superior reliability.

关键词： strain gauge flexible gauge au nanoparticle sound-wave detection radial-artery detection electron tunneling