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Free-standing ZnO nanorod arrays modified with single-walled carbon nanotubes for betavoltaics and photovoltaics

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Journal of Materials Science & Technology 2020年第19期54卷 48-57页

作者： Changsong Chen Jiang Chen Zhen Wang Jian Zhang Haisheng San Shichao Liu Chunyu Wu Werner Hofmann Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518000China College of Energy Xiamen UniversityXiamen 361005China Shanghai Institute of Space Power-Sources Shanghai 200245China Institute of Solid State Physics Technical University of BerlinBerlin 10623Germany

A full-duplex radiant energy converter based on both betavoltaic and photovoltaic effects in an easyto-implement way is an attractive alternative for the autonomous wireless sensor ***,we report a novel beta/photovoltaic cell based on free-standing Zn O nanorod arrays(ZNRAs)modified with metallic single-walled carbon nanotubes(m-SWCNTs),using radioisotope63 Ni as beta-emitting *** ZNRAs were grown on Al-doped Zn O(AZO)conductive glass using hydrothermal *** optimum length and diameter of Zn O nanorods were determined by Monte Carlo simulation for beta energy deposition in *** m-SWCNTs were anchored into the ZNRAs to form a three-dimensional(3-D)Schottky junction structure for effectively separating the beta/photo-excited electron-hole ***,the betavoltaic and photovoltaic effects were confirmed through the I-V measurements of beta/photovoltaic cells under beta/UV/Vis irradiations,*** is suggested that the m-SWCNTs play key role for the enhancement of beta/photovoltaic performance through the formation of extensive3-D Schottky junction,the conductive network for hole transport,and the surface plasmon resonance exciton absorption for visible light.

关键词： ZnO nanorod arrays Single-walled carbon nanotube Betavoltaics photovoltaics

Ionic Liquid Engineering in Perovskite photovoltaics

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Energy & Environmental Materials 2023年第5期6卷 1-21页

作者： Fei Wang Dawei Duan Mriganka Singh Carolin M.Sutter-Fella Haoran Lin Liang Li Panče Naumov Hanlin Hu Hoffman Institute of Advanced Materials Shenzhen PolytechnicShenzhen 518000China Molecular Foundry Division Lawrence Berkeley National LaboratoryBerkeley California 94720USA Department of Sciences and Engineering Sorbonne University Abu Dhabi38044Abu DhabiUnited Arab Emirates Smart Materials Lab New York University Abu Dhabi129188Abu DhabiUnited Arab Emirates Molecular Design Institute Department of ChemistryNew York University100 Washington Square EastNew YorkNY 10003USA

Over the past decade,perovskite photovoltaics have approached other currently available technologies and proven to be the most prospective type of solar *** the many-sided research in this very active field has generated consistent results with regard to their undisputed consistently increasing power conversion efficiency,it also produced several rather contradictory *** other important details,debate surrounding their proneness to surface degradation and poor mechanical robustness,as well as the environmental footprint of this materials class,remains a moot *** application of ionic liquids appears as one of the potential remedies to some of these challenges due to their high conductivity,the opportunities for chemical"tuning"of the structure,and relatively lower environmental *** article provides an overview,classification,and applications of ionic liquids in perovskite solar *** summarize the use and role of ionic liquids as versatile additives,solvents,and modifiers in perovskite precursor solution,in charge transport layer,and in interfacial and stability ***,challenges and the future prospects for the design and/or selection of ionic liquids with a specific profile that meets the requirements for next-generation highly efficient and stable perovskite solar cells are proposed.

关键词： devices ionic liquids perovskites photovoltaics

Progress of Pb-Sn Mixed Perovskites for photovoltaics: A Review

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Energy & Environmental Materials 2022年第2期5卷 370-400页

作者： Rajapakshe Mudiyanselage Indrachapa Bandara Shashini M.Silva Cameron C.L.Underwood K.D.G.Imalka Jayawardena Radu A.Sporea S.Ravi P.Silva Advanced Technology Institute Faculty of Engineering and Physical SciencesUniversity of SurreyGuildford Surrey GU27XHUnited Kingdom

Pb-Sn mixed perovskites are becoming increasingly popular as narrowbandgap(1.2–1.3 eV)light absorbers in single-junction perovskite solar cells(PSCs)and as bottom cells for all-perovskite tandem solar cells,for highefficiency,low-cost,lightweight,roll-to-roll printable photovoltaic(PV)*** the first report of planar Pb:Sn mixed PSCs in 2014,the power conversion efficiencies(PCE)have increased from 10%to 21%by the end of 2020 with an exponential growth in research conducted in this *** much effort,the performance and stability of Pb-Sn mixed PSCs are still limited,which constrains their long-term use in all-perovskite tandem *** review highlights the avenues explored in improving different aspects of Pb-Sn mixed PSCs and provides a comprehensive discussion of the interdependent factors affecting the device *** includes compositional engineering of the perovskite crystal,absorber layer fabrication and crystallization methods,bandgap tuning,Sn4+reduction,and surface passivation of the absorber layer,as well as the selection of interlayers and electrodes of the final PSC.

关键词： inorganic-organic hybrids lead-tin mixed perovskites perovskites photovoltaics solution-processed

Single-stage Five-level Common Ground Transformerless Inverter with Extendable Structure for Centralized photovoltaics

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 37-49页

作者： Vishal Anand Varsha Singh Jagabar Sathik Dhafer Almakhles Department of Electrical Engineering National Institute of Technology RaipurIndia Renewable Energy Lab Prince Sultan UniversityRiyadh11586Saudi Arabia Department of Electrical and Electronics Engineering SRM Institute of Science and TechnologyKattankulathur Campus603203-Tamil NaduIndia

The paper presents a five-level common ground type(5L-CGT),transformer-less inverter topology with double voltage *** proposed inverter uses eight switches and two capacitors,charged at input voltage *** inverter in its basic form acts as a string inverter for low-power PV ***,it can be extended to work as a scalable multi-level inverter with higher power handling capability to act as a centralized *** working of the inverter with the sizing of the components is presented with mathematical *** efficiency of the proposed PV inverter is found using thermal losses associated with switches using PLECS software.A prototype of 1 kW has been designed,and experimentation has been carried *** loads with a lagging power factor up to 0.6 have been tested with the inverter to establish the usability of the proposed inverter in a worst-case emulated homeuse *** total harmonic distortion(THD)at the output has been recorded using a power quality analyzer with voltage and current THD values of 4.5%and 2.5%,respectively,which lies within the limits of IEEE 519 *** highest power conversion efficiency of the inverter has been recorded to be 96.20%.

关键词： Active and reactive power boost inverter common mode voltage(CMV)grid-tied inverters inrush current leakage current photovoltaics

Solar spectral conversion based on plastic films of lanthanide-doped ionosilicas for photovoltaics:Down-shifting layers and luminescent solar concentrators

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Journal of Rare Earths 2020年第5期38卷 531-538页

作者： M.A.Cardoso S.F.H.Correia A.R.Frias H.M.R.Goncalves R.F.P.Pereira S.C.Nunes M.Armand P.S.André V.de Zea Bermudez R.A.S.Ferreira Department of Physics and CICECO-Aveiro Institute of Materials University of Aveiro3810-193AveiroPortugal Department of Chemistry and CQ-VR University of Tras-os-Montes e Alto Douro5000-801Vila RealPortugal Instituto de Telecomunicacoes University of Aveiro3810-193AveiroPortugal REQUIMTE Instituto Superior de Engenharia do Porto4200-072PortoPortugal Chemistry Centre and Chemistry Department University of Minho4710-057BragaPortugal CICS-Health Sciences Research Center and Chemistry Department University of Beira Interior6201-001CovilhaPortugal Electrical Energy Storage Department CIC EnergiguneParque Tecnologico de AlavaMinano01510Spain Department of Electrical and Computer Engineering Instituto de TelecomunicacoesInstituto Superior TecnicoUniversidade de Lisboa1049-001LisbonPortugal

The mismatch between the photovoltaic(PV)cells absorption and the solar irradiance on earth is one of the major limitations towards more efficient PV energy *** aspect was addressed by downshifting the solar irradiance on Earth through luminescent down-shifting layers based on lanthanidedoped surface-functionalized ionosilicas(ISs)embedded in poly(methyl methacrylate)(PMMA)coated on the surface of commercial Si-based PV *** IS-PMMA hybrid materials exhibit efficient solar radiation harvesting(spectral overlap of^9.5×10^19 photons/(s·m2))and conversion(quantum yield^52%).The direct solar radiation and the down-shifted radiation are partially guided and lost through total internal reflection to the layer edges being unavailable for PV conversion of the coated PV *** tuning the down-shifting layer thickness,it also acts as luminescent solar concentrator enabling the collection of the guided radiation by flexible PV cells applied on the borders of the down-shifting layer leading to an enhancement of the PV energy conversion from^5%(in the case of the single-use of the luminescent down-shifting layer)to^13%comparing with the bare PV *** overall electrical output of the device resulted in an absolute external quantum efficiency increase of^32%for the optimized Eu^3+-based films in the UV spectral region(compared with the bare PV device,which is among the best values reported so far).

关键词： Ionosilicas Lanthanides photovoltaics Luminescent solar concentrators Down-shifting layers Silicon photovoltaic cells

Design and fabrication of 1-D semiconductor nanomaterials for high-performance photovoltaics

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Science Bulletin 2016年第5期61卷 357-367页

作者： Ning Han Zaixing Yang Lifan Shen Hao Lin Ying Wang Edwin Y.B.Pun Yunfa Chen Johnny C.Ho State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of SciencesBeijing 100190 China CAS Center for Excellence in Urban Atmospheric Environment Xiamen 361021 China Department of Physics and Materials Science City University of Hong Kong Hong Kong China State Key Laboratory of Millimeter Waves City University of Hong Kong Hong Kong China Shenzhen Research Institute City University of Hong KongShenzhen 518057 China Department of Electronic Engineering City University of Hong Kong Hong Kong China

To date, the cost-effective utilization of solar energy by photovoltaics for large-scale deployment remains challenging. Further cost minimization and efficiency maximization, through reduction of material consumption, simplification of device fabrication as well as optimization of device structure and geometry, are required. The usage of 1D nanomaterials is attractive due to the outstanding light coupling effect, the ease of fabrication, and integration with one-dimensional(1-D) semiconductor materials. The light absorption efficiency can be enhanced significantly, and the corresponding light-toelectricity conversion efficiency can be as high as their bulk counterparts. Also, the amount of active materials used can be reduced. This review summarizes the recent development of 1-D nanomaterials for photovoltaic applications, including the anti-reflection, the light absorption,the minority diffusion, and the semiconductor junction properties. With solid progress and prospect shown in the past 10 years, 1-D semiconductor nanomaterials are attractive and promising for the realization of high-efficiency and low-cost solar cells.

关键词： One-dimensional nanomaterials photovoltaics Solar cells Light absorption Minority diffusion length Semiconductor junction

Evaluation of Voltage Quality and Energy Saving Benefits of Urban Rail Transit Power Supply Systems Considering the Access of photovoltaics

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CSEE Journal of Power and Energy Systems 2023年第6期9卷 2309-2320页

作者： Ding Feng Hengkai Zhu Feng Wang Xiaojun Sun Sheng Lin Zhengyou He the School of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China. China Railway Design Group Co. Ltd.Tianjin 300000China

Along the route of urban rail transit(URT),the subway depots,parking lots,and elevated subway stations are equipped with sufficient photovoltaic(PV)generation *** access of PVs in the URT power supply system should not only make full use of nearby renewable energy,but also improve the economic operation of the *** order to quantify the impact of PV access on the URT power supply system,this paper proposes a method to evaluate the voltage quality and energy saving benefits of the URT power supply system,considering PV ***,by fully considering the random fluctuations of PV output power,as well as the intermittency and impact of traction load,the URT power supply system with PV access is ***,such values as system voltage and power are calculated through the hybrid AC/DC load flow calculation *** with the results of the load flow calculation,the indicators describing voltage quality and power saving benefits of the system are proposed to quantify the influence of PV access on the ***,a case study concerning a certain section of a subway line is presented to verify the proposed *** shows that the proposed method can effectively quantify the voltage quality and power saving benefits of the system after PV access,providing valuable insights for design and maintenance personnel to comprehend system state and operating characteristics.

关键词： Energy saving benefits photovoltaics urban rail transit voltage quality

Technological parameters of thin-film pulsed laser scribing for perovskite photovoltaics

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Clean Energy 2024年第3期8卷 127-135页

作者： Rustam Ishteev Pavel Gostishchev Mariia Tiukhova Anton Sorokin Arthur Ishteev Vladimir Kondratenko Laboratory of Precision Machining of Materials Department of NanoelectronicsInstitute for Advanced Technologies and Industrial ProgrammingRTU MIREAMoscowRussia Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies of the Moscow Health Care Department MoscowRussia Laboratory of Advanced Solar Energy(LASE) National University of Science and Technology MISIS4 Leninsky St.MoscowRussia Semenov Federal Research Center of Chemical Physics Russian Academy of Sciences(RAS)4 Kosygina str.MoscowRussia

Over the past decade,the power conversion efficiency of halide perovskite solar cells has shown a rapid increase to 26.1%.The significant efficiency growth and the relative simplification of the technology for obtaining thin-film solar cells due to liquid printing methods determine the high potential for the low-cost perovskite solar cells ***,efficient use of cell geometry is comparable to the size of standard crystalline-Si wafers(156:156 mm and more).Therefore,modular geometry similar to amorphous-Si solar cell approaches is used to scale perovskite solar *** electrical connection of thin-film cells requires precise processing of the conductive layers that form the device p-i-n *** subject of research is the development of a full pulsed laser scribing cycle for inverted perovskite solar *** this work,we propose a study of a laser-patterning technology In_(2)O_(3):SnO_(2)(ITO)conductive layer and a photoactive perovskite layer Cs0,2(CH(NH_(2))_(2))_(0,8)PbI_(3).Process regimes of transparent conducting electrodes based on ITO and halide perovskite layer Cs_(0,2)(CH(NH_(2))_(2))_(0,8)PbI_(3)laser patterning were *** optimal parameters for the multipass mode processing of ITO and perovskite layer were *** cell was electrically isolated at a scribe line width of 30μm.

关键词： patterning perovskite solar cell perovskite solar cell photovoltaics scribing

Recent progress of thin-film photovoltaics for indoor application

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Chinese Chemical Letters 2020年第3期31卷 643-653页

作者： Nanfu Yan Chaowei Zhao Shengyong You Yuefeng Zhang Weiwei Li Institute of Applied Chemistry Jiangxi Academy of SciencesNanchang 330096China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 10090China

Indoor photovoltaics have attracted increasing attentions owing to their great potential in supplying energy for low power devices under indoor light in our daily *** third generation thin-film solar cells,including dye-sensitized solar cells,perovskite solar cells and organic solar cells,have made rapid progress from the aspect of materials design to photovoltaic *** review provides an overview on the recent advances in the development of indoor photovoltaic technologies based on the third generation solar *** design principles of advanced thin-film indoor photovoltaics were also summarized according to the characteristics of indoor light and the advantages of the third generation solar ***,after summarizing the current research progress,the perspective on this topic is provided.

关键词： Indoor photovoltaics Dye-sensitized solar cells Perovskites solar cells Organic solar cells Power conversion efficiency