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Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology

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Light(Science & Applications) 2020年第1期9卷 883-889页

作者： Shuo yang Jiacheng Yao Yingnan Quan Mingyue Hu Rui Su Ming Gao Donglai Han jinghai yang College of Science Changchun UniversityChangchun 130022China National Demonstration Centre for Experimental Physics Education Jilin Normal UniversitySiping 136000China Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130012China Key Laboratory of Preparation and Application of Environmental Friendly Materials Jilin Normal UniversityMinistry of EducationChangchun 130103China School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China

Surface-enhanced Raman scattering(SERS)and photoluminescence(PL)are important photoexcitation spectroscopy techniques;however,understanding how to analyze and modulate the relationship between SERS and PL is rather important for enhancing SERS,having a great effect on practical *** this work,a charge-transfer(CT)mechanism is proposed to investigate the change and relationships between SERS and *** the change in PL and SERS before and after the adsorption of the probe molecules on Nd-doped ZnO indicates that the unique optical characteristics of Nd^(3+) ions increase the SERS *** the other hand,the observed SERS can be used to explain the cause of PL background *** study demonstrates that modulating the interaction between the probe molecules and the substrate can not only enhance Raman scattering but also reduce the SERS *** work also provides a guideline for the investigation of CT as well as a new method for exploring fluorescence quenching.

关键词： SERS charge transfer

Full-scale chemical and field-effect passivation:21.52% efficiency of stable MAPbI_(3) solar cells via benzenamine modification

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Nano Research 2021年第8期14卷 2783-2789页

作者： Fengyou Wang Meifang yang Yuhong Zhang Jinyue Du Shuo yang Lili yang Lin Fan Yingrui Sui Yunfei Sun jinghai yang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China National Demonstration Center for Experimental Physics Education Jilin Normal UniversitySiping 136000China Key Laboratory of Preparation and Application of Environmental Friendly Materials Ministry of EducationJilin Normal UniversityChangchun 130103China College of Science Changchun UniversityChangchun 130022China

Organic-inorganic metal halide perovskite solar cells have achieved high efficiency of 25.5%.Finding an effective means to suppress the formation of traps and correlate stability losses are thought to be a promising route for further increasing the photovoltaic performance and commercialization potential of perovskite photovoltaic ***,we report a facile passivation model,which uses a multi-functional organic molecule to simultaneously realize the chemical passivation and field-effect passivation for the perovskite film by an upgraded anti-solvent coating method,which reduces the trap states density of the perovskite,improves interface charge transfer,and thus promotes device *** addition,the hydrophobic groups of the molecules can form a moisture-repelling barrier on the perovskite grains,which apparently promotes the humidity stability of the solar ***,the optimal power conversion efficiency(PCE)of perovskite solar cells after synergistic passivation reaches 21.52%,and it can still retain 95%of the original PCE when stored in-40%humidity for 30 *** findings extend the scope for traps passivation to further promote both the photovoltaic performance and the stability of the perovskite solar cells.

关键词： chemical passivation anti-solvent MAPbI_(3)solar cells recombination charge transfer

Upgraded antisolvent engineering enables 2D@3D quasi core-shell perovskite for achieving stable and 21.6%efficiency solar cells

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Journal of Materials Science & Technology 2021年第33期92卷 21-30页

作者： Fengyou Wang Jinyue Du Yuhong Zhang Meifang yang Donglai Han Lili yang Lin Fan Yingrui Sui Yunfei Sun jinghai yang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China National Demonstration Center for Experimental Physics Education Jilin Normal UniversitySiping 136000China Key Laboratory of Preparation and Application of Environmental Friendly Materials Ministry of EducationJilin Normal UniversityChangchun 130103China School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China

Perovskite solar cells(PSCs)have become a promising alternative to sustainable energy due to their high power conversion efficiency(PCE)and low-cost ***,the practical applications of PSCs are still limited by the trade-off between high performance and poor stability under ***,a2D@3D perovskite with quasi core-shell architecture linking the superiorities of both two-dimensional(2D)and three-dimensional(3D)perovskite is prepared through a novel upgraded antisolvent *** basic properties as well as the phase distribution and the charge transport behavior of the 2D@3D perovskite were systematically elucidated.A high PCE of 21.60%for 2D@3D PSCs is achieved due to the enhanced surface and grain boundaries passivation,improved energy level alignment and efficient holes *** 2D@3D perovskite device without encapsulation shows significantly improved stability at the room temperature(90%of initial PCE for 45 d with a relative humidity of 50%±5%)and relative thermal conditions(83%of initial PCE for 200 h under 85℃).Compared with traditional 3D PSCs,it proved that such 2D@3D perovskite configuration is an effective architecture for enhancing efficiency and improving stability and therefore will facilitate the further industrialization of PSCs.

关键词： Low-cost processing Surface and grain boundaries Two-dimensional materials Efficiency Stability

Self-cleaning semiconductor heterojunction substrate: ultrasensitive detection and photocatalytic degradation of organic pollutants for environmental remediation

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Microsystems & Nanoengineering 2020年第1期6卷 27-36页

作者： Mingyue Hu Yingnan Quan Shuo yang Rui Su Huilian Liu Ming Gao Lei Chen jinghai yang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal University130103 ChangchunPeople’s Republic of China National Demonstration Centre for Experimental Physics Education Jilin Normal University136000 SipingPeople’s Republic of China Key Laboratory of Preparation and Application of Environmental Friendly Materials Jilin Normal UniversityMinistry of Education130103 ChangchunPeople’s Republic of China College of Science Changchun University130022 ChangchunPeople’s Republic of China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of Sciences130103 ChangchunPeople’s Republic of China

Emerging technologies in the field of environmental remediation are becoming increasingly significant owing to the increasing demand for eliminating significant amounts of pollution in water,soil,and *** designed and synthesized MoS 2/Fe 2 O 3 heterojunction nanocomposites(NCs)as multifunctional materials that are easily separated and *** trace detection performance of the prepared sample was examined using bisphenol A(BPA)as the probe molecule,with limits of detection as low as 10−9 M;this detection limit is the lowest among all reported semiconductor *** was subjected to rapid photocatalytic degradation by MoS_(2)/Fe_(2)O_(3) NCs under ultraviolet *** highly recyclable MoS_(2)/Fe_(2)O_(3) NCs exhibited photo-Fenton catalytic activity for BPA and good detection ability when reused as a surface-enhanced Raman scattering(SERS)substrate after *** SERS and photocatalysis mechanisms were proposed while considering the effects of the Z-scheme charge-transfer paths,three-dimensional flower-like structures,and dipole–dipole ***,the prepared MoS_(2)/Fe_(2)O_(3) NCs were successfully applied in the detection of BPA in real lake water and milk ***,we present insights into the development of MoS_(2)/Fe_(2)O_(3) materials,which can be used as multifunctional materials in chemical sensors and in photocatalytic wastewater treatments for the removal of recalcitrant organic pollutants.

关键词： dipole photocatalytic ultraviolet

Two Alternative Routes to MS_2 Nanotubes

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Journal of Materials Science & Technology 2007年第2期23卷 185-188页

作者： Yanqing LIU Changsheng LI jinghai yang Zhong HUA Junmao LI Kehong YAN Shuhuo ZHAO College of Physics Jilin Normal University Siping 136000 China School of Material Science and Engineering Jiangsu University Zhenjiang 212013 China

Inorganic tubular nanostructure MS2 （M=Mo, W, Nb, Ta） were synthesized by two alternative routes. Thermal decomposition method was used for producing fullerence-like MS2 （M=Mo, W） nanotubes on Al2O3 template using ammonium sulfur respectively; NbS2, and TaS2 nanotubes were obtained successfully by reducing corresponding metal trisulfide in a stream of H2 （mixed with N2 in some cases） at elevated *** experimental procedure, and the characterization of associated results, were evaluated using X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and high resolution transmission electron microscopy （HRTEM）. The result reveals that products are composed of high density of MS2 tubular nanostructures with the diameter of 100 nm and length of tens of micrometers. And no mistake, these 1-D （one-dimensional） tubular nanomaterials added quantities and varieties in the growing family of nanotubes of inorganic layered materials.

关键词： Dichalcogenide Nanotube Thermal decomposition Gas-solid reaction

Moisture-preventing MAPbI_(3) solar cells with high photovoltaic performance via multiple ligand engineering

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Nano Research 2022年第2期15卷 1375-1382页

作者： Xin Li Jinyue Du Hui Duan Haoyan Wang Lin Fan Yunfei Sun Yingrui Sui jinghai yang Fengyou Wang Lili yang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China National Demonstration Center for Experimental Physics Education Jilin Normal UniversitySiping 136000China Key Laboratory of Preparation and Application of Environmental Friendly Materials Ministry of EducationJilin Normal UniversityChangchun 130103China

Perovskite solar cells present one of the most prominent photovoltaic technologies,yet their stability,and engineering at the molecular level remain *** have demonstrated multifunctional molecules to improve the operating stability of perovskite solar cells while depicting a high-power conversion *** multifunctional molecule 4-[(trifluoromethyl)sulphanyl]-aniline(4TA)with trifluoromethyl(-CF_(3))and aniline(-NH_(2))moieties is meticulously designed to modulate the ***-CF_(3) and-NH_(2) functional groups have strong interaction with perovskite to suppress surface defects to improve device stability,as well as obtain large crystal grains through delaying ***,this-CF_(3) forms a hydrophobic barrier on the surface of the perovskite to prevent cell ***,the performance of the perovskite solar cells is remarkably improved with the efficiency increased from 18.00% to 20.24%.The perovskite solar cells with multifunctional molecular maintaining 93% of their original efficiency for over 30 days(-55%humidity)in air without device encapsulation,exhibiting a high long-term ***,the lead leakage issue of perovskite solar cells has also been suppressed by the built-in 4TA molecule,which is beneficial to environment-friendly ***,we believe this multifunctional small molecule provides an available way to achieve high performance perovskite solar cells and the related design strategy is helpful to further develop more versatile materials for perovskite-based optoelectronic devices.

关键词： stability high-power conversion efficiency perovskite solar cells hydrophobic barrier

Self-sustainable and recyclable ternary Au@Cu2O–Ag nanocomposites:application in ultrasensitive SERS detection and highly efficient photocatalysis of organic dyes under visible light

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Microsystems & Nanoengineering 2021年第2期7卷 121-130页

作者： Tong Wu Hui Zheng Yichuan Kou Xinyue Su Naveen Reddy Kadasala Ming Gao Lei Chen Donglai Han yang Liu jinghai yang College of Physics Jilin Normal UniversitySiping136000China Department of Chemistry Towson UniversityTowsonMD21252USA School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun130022China

Ternary noble metal–semiconductor nanocomposites(NCs)with core–shell–satellite nanostructures have received widespread attention due to their outstanding performance in detecting pollutants through surface-enhanced Raman scattering(SERS)and photodegradation of organic *** this work,ternary Au@Cu2O–Ag NCs were designed and prepared by a galvanic replacement *** effect of different amounts of Ag nanocrystals adsorbed on the surfaces of Au@Cu2O on the SERS activity was investigated based on the SERS detection of 4-mercaptobenzoic acid(4-MBA)reporter *** on electromagnetic field simulations and photoluminescence(PL)results,a possible SERS enhancement mechanism was proposed and ***,Au@Cu2O–Ag NCs served as SERS substrates,and highly sensitive SERS detection of malachite green(MG)with a detection limit as low as 10−9 M was *** addition,Au@Cu2O–Ag NCs were recycled due to their superior self-cleaning ability and could catalyze the degradation of MG driven by visible *** work demonstrates a wide range of possibilities for the integration of recyclable SERS detection and photodegradation of organic dyes and promotes the development of green testing techniques.

关键词： method. visible ternary

Facile Synthesis of Fe3Pt-Ag Nanocomposites for Catalytic Reduction of Methyl Orange

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Chemical Research in Chinese Universities 2018年第6期34卷 871-876页

作者： HAN Donglai LI Boxun XING Guoliang ZHANG Yuanyuan CHEN Yue SUN Yantao ZHANG Yongjun LIU yang yang jinghai School of Materials Science and Engineering Changchun Universi.tv of Science and Technology Changehun 130022 P. R. China Jilin Special Equipment Inspection and Research Institute Jilin 132013 P. R. China Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education Jilin Normal University Changchun 130103 P. R. China

The polyethyleneimine dithiocarbamate was employed as polymers to synthesize Fe3Pt-Ag nanocomposites by using the seed deposition method. Fe3Pt-Ag nanocomposites were utilized for the catalytic degradation of methyl orange（MO） in the presence of NaBH4. Fe3Pt-Ag nanocomposites showed good chemical catalytic activity and stability in pollutants degradation. Furthermore, Fe3Pt-Ag nanocomposites can keep their efficiency till four cycles. The results suggest that the nanocatalysts with recyclability have broad prospects in environmental conservation applications.

关键词： Fe3Pt-Ag nanocomposite Methyl orange Catalytic reduction Magnetic property

Luminescence Characteristics and Energy Transfer Machanismof LaOBr:Tb^(3+) (Dy^(3+))

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Journal of Materials Science & Technology 1997年第6期13卷 479-482页

作者： jinghai yang Chunzhong MIN and Zhanguo ZONG(Institute of Solid State Physics, Siping Normal University, Siping 136000, China)Yongji LI(Siping Teachers College, Siping 136000, China)Xingyin LIU(Changchun Institute of Physics, Chinese Academy of Sciences, Institute of Solid State Physics Siping Normal University Siping 136000 China Siping Teachers College Siping 136000 China Changchun Institute of Physics Chinese Academy of Sciences Changchun 130019 China

The rare earth luminescence materials LaOBrfTb3+(Dy3+) were synthesized at high temperature,and the structure and luminescence characteristics were studied. The co-doping Dy3+ may make the energy of 5D3 of Tb3+ transfer to 5D4 level, which makes the emission of 5D4-7FJ (J=0,1... 6), specially of 5D4-7F5, enhance obviously, and the total brightness is increased by about 40% in comparison with the samples without Dy3+ cations, as a result of the energy transfer of dipole-dipole interaction.

关键词： Dy Br Luminescence Characteristics and Energy Transfer Machanismof LaOBr nm