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Performance of redox flow battery systems in Japan

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储能科学与技术 2013年第3期2卷 233-236页

作者： Shibata Toshikazu Kumamoto Takahiro Nagaoko Yoshiyuki Kawase Kazunori Yano Keiji Sumitomo Electric Industries Ltd.1-1-3 ShimayaKonohana-kuOska 554-0024Japan

Renewable energies, such as solar and wind power, are increasingly being introduced as alternative energy sources on a glosbal scale toward a low-carbon society. For the next generation power network, which uses a large number of these distributed power generation sources, energy storage technologies will be indispensable. Among these technologies, battery energy storage technology is considered to be most viable. Sumitomo Electric Industries, Ltd. has developed a redox flow battery system suitable for large scale energy storage, and carried out several demonstration projects on the stabilization of renewable energy output using the redox flow battery system. This paper describes the advantages of the redox flow battery and reviews the demonstration projects.

关键词： redox flow battery energy storage renewable energy smart grid wind turbine photovoltaics

Photocurrents induced by stimulated absorption of light

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Natural Science 2010年第1期2卷 63-66页

作者： Alexey Kavokin Giuseppe Eramo 不详

In organic materials absorption of light results in creation of the Frenkel excitons, Coulomb -bound electron-hole pairs having an integer spin. Being composite bosons, Frenkel excitons may accumulate in significant quantities in a single quantum state. The probability of photon absorption by such a state increases as (N+1) where N is the occupation number of the state. This enhancement is due to the stimulated ab-sorption of light, which is a final-state stimu-lated process analogous to the well-known stimulated emission of light. We propose using the stimulated absorption for creation of solar cells of a record quantum efficiency. We are going to use the organic microspheres to ac-cumulate the Frenkel excitons at the discrete frequencies corresponding to the photonic whispering gallery modes of the sphere. The dissociation of accumulated Frenkel excitons will be effectuated periodically using the trans-parent carbon contacts on a piezoelectric mechnical support.

关键词： SolarCell photovoltaics Exciton Bose-EinsteinCondensation

Comparison of Different Solutions for Blocking Diode Applications in a Photovoltaic Panel under Varying Ambient Conditions

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Journal of Energy and Power Engineering 2011年第4期5卷 356-360页

作者： H.C. Neitzert A. Astone Department of Electrical Engineering （DIIIE） Salerno University Via Ponte Don Melillo 1 Fisciano 84084 Italy Telecom Italia Mobile （TIM） Via Pascoli 9 Trieste 34129 Italy

We characterized a crystalline silicon based mini-module under varying ambient conditions, developed a PSPICE model for this panel, including temperature and irradiation dependence and applied this model to the simulation of the impact of a blocking diode under different shadowing conditions. Different blocking diodes were examined, like germanium and silicon homojunction diodes and silicon Schottky diodes and compared to ＂intelligent＂ diodes, consisting of operational amplifiers with MOSFET switches. The simulations indicate a strongly reduced power loss in a panel integrating the new ＂intelligent＂ blocking diodes even when compared to silicon Schottky diodes, as the best performing traditional blocking diodes.

关键词： Blocking diode bypass diode photovoltaics circuit simulation shadowing intelligent diode MOSFET.

Thermodynamically Self-healing 1D-3D Hybrid Perovskite Solar Cells

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Thermodynamically Self-healing 1D-3D Hybrid Perovskite Solar...

第五届新型太阳能电池学术研讨会

作者： Jiandong Fan Yunping Ma Cuiling Zhang Chong Liu Wenzhe Li Ruud E.I. Schropp Yaohua Mai Institute of New Energy Technology College of Information Science and TechnologyJinan University

Thermal degradation in perovskite solar cells is still an unsettled issue that limits its further development. In this study, we introduced 2-(1 H-pyrazol-1-yl)pyridine(PZPY)into the lead halide 3-dimensional(D) perovskites, which allowed to obtain 1D-3D hybrid perovskite materials. The heterostructure 1D-3D perovskites were proved to be capable of remarkably prolonging the photoluminescence decay lifetime and suppressing charge carrier recombination in comparison to conventional 3D perovskites. The intrinsic properties of thermodynamically stable yet kinetically labile 1D materials allowed the system to alleviate the lattice mismatch and passivate the interface traps of heterojunction region of 1D-3D hybrid perovskites that may occur during the crystal growth process. Importantly, the as-fabricated 1D-3D perovskite solar cells displayed thermodynamically self-healing ability, which was induced through blocking the ion-immigration channels of A-site ions by the flexible 1D perovskite with less densely close-packed structure. Particularly, the power conversion efficiency(PCE) of as-fabricated unencapsulated 1D-3D perovskite solar cells was demonstrated to be reversible under temperature cycling(25-85 °C) at 55% relative humidity(RH), which largely outperformed the pure 3D perovskite solar *** present study provides a facile approach to fabricate 1D-3D perovskite solar cells with high efficiency and long-term stability.

关键词： 1D-3D perovskite self-healing capability thermal stability photovoltaics

Well-designed dual metal Nb/Ta co-modified nitrogen doped carbon: An active sites-enriched catalyst for efficiently catalyzing triiodide reduction

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Well-designed dual metal Nb/Ta co-modified nitrogen doped ca...

第八届新型太阳能材料科学与技术学术研讨会

作者：王曦 Jiaoe Dang Lishan Zhang Menglong Sun Shuanngxi Yuan Yinhao Wang Changwei Dang Yingying Deng Zhuolei Liu 云斯宁 Functional Materials Laboratory (FML) School of Materials science and EngineeringXi’an University of Architecture and Technology

The development of advanced catalysts with excellent catalytic ability and stability is critical for improving energy conversion efficiency in triiodide reduction reaction(IRR). To fabricate high-quality catalysts with abundant active sites, a series of transition-metal-modified nitrogen-doped carbon catalysts(Ta-N-C, Nb-N-C, and Nb/Ta-N-C) was successfully fabricated via pyrolysis and ion exchange. Owing to the high conductivity and ion transport capacity of its unique nitrogen-carbon structure and synergistic effect of dual-metal active sites on modulating electronic structure, Nb/TaN-C catalyst exhibited excellent catalytic performance and remarkable electrochemical stability. Nb/Ta-N-C catalyst achieved an ideal conversion efficiency of 8.45% in solar cells, which was higher than that of Pt electrode(7.63%). This work provided a new approach for the rational design of the active-sites-rich electrocatalysts for energy conversion applications.

关键词： Bimetal co-modification Triiodide reduction reaction Counter electrode Nitrogendoped carbon photovoltaics

Solution-Processable Copper(Ⅰ) Thiocyanate(CuSCN) as Hole Transport Layers for BiI3 Solar Cells

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Solution-Processable Copper(Ⅰ) Thiocyanate(CuSCN) as Hole T...

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Zhangwei He Tinglei Zhao Huanyu Ma Zhanao Tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical Technology

The solar cells have emerged as a series of star technologies in utilization of renewable ***,the issues raised by the short lifetime of the photovoltaics and toxic processing have severely limited their potential *** this work,we develop a two-step environmentally friendly solution deposition method to fabricate bismuth triiodide(BiI) solar *** the technique,we harvest large size crystals and obtained uniform morphology of BiI *** addition,we demonstrate the use of solution-processable copper(I) thiocyanate(CuSCN) as hole transport layers in BiI solar *** devices display an overall power conversion efficiency of 0.8% under AM 1.5 G *** work provides new strategies for achieving high-efficiency BiI solar cells.

关键词： bismuth triiodide hole transport layer solution-processable photovoltaics

Novel Fluorene-thiophene Copolymers and Polymer Blends for Photonic Devices

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复旦学报（自然科学版） 2007年第5期46卷 623-页

作者： V.CIMROVA P.PVLACKVA D.VYPRACHTICKY I.KMINEK J.TOUSEK Institute of Macromolecular Chemistry Academy of Sciences of the Czech RepublicHeyrovského nám. 2CZ-162 06 Praha 6 Czech Republic Department of Macromolecular Physics Faculty of Mathematics and PhysicsCharles University V Hole ovikách 2 18000 Prague 8 Czech Republic

1 Results In this contribution we deal with photophysical and photoelectrical study of novel fluorene-thiophene copolymers, and thiophene-based oligomers and polymers, the syntheses of which are reported in our other contributions. Information about electronic structure of the polymers was obtained from cyclic voltammetry and absorption spectroscopy. The absorption of the polymers under study covers the whole visible region; the low band-gap polymer (Eg=1.35 eV) exhibited the long-wavelength absorption ...

关键词： conjugated polymers photophysics electronic structure photovoltaics

新型共轭聚合物分子设计与异质结调控及其光伏电池

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新型共轭聚合物分子设计与异质结调控及其光伏电池

2012年全国高分子材料科学与工程研讨会

作者：吴飞燕查代军蔡淑娇谌烈陈义旺南昌大学化学系/高分子研究所

＜正＞共轭聚合物有机半导体异质结光伏电池具有分子可设计性强,毒性小、工艺简单、可在柔性衬底上制备等特殊优势。通过聚合物的分子设计可以调节光谱吸收范围、能级、异质结形貌调控,提高开路电压、短路电流、填充因子,实现高转换率... 详细信息

＜正＞共轭聚合物有机半导体异质结光伏电池具有分子可设计性强,毒性小、工艺简单、可在柔性衬底上制备等特殊优势。通过聚合物的分子设计可以调节光谱吸收范围、能级、异质结形貌调控,提高开路电压、短路电流、填充因子,实现高转换率的太阳能有机光伏电池材料。突破以往线性D-A交替的分子设计方法,在咔唑的3-、4-、5-、6-位引入双噻二唑首次

关键词： Conjugated polymers photovoltaics D-A integrated structure Heterojunction

Integrated optimisation of photovoltaic and battery storage systems for UK commercial buildings

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建筑节能(中英文) 2017年第8期 136-136页

作者： Arthur Mariaud Salvador Acha Ned Ekins-Daukes Nilay Shah Christos N.Markides 侯恩哲《建筑节能》杂志社

Decarbonising the built environment cost-effectively is a complex challenge public and private organisations are facing in their effort to tackle climate *** this context,this work presents an integrated Technology Selection and Operation(TSO)optimisation model for distributed energy systems in commercial *** purpose of the model is to simultaneously optimise the selection,capacity and operation of photovoltaic(PV)and battery systems;serving as a decision support framework for assessing technology investments.A steady-state mixed-integer linear programming(MILP)approach is employed to formulate the optimisation *** virtue of the TSO model comes from employing granular state-of-the-art datasets such as half-hourly electricity demands and prices,irradiance levels from weather stations,and technology databases;while also considering building specific *** revenues are obtained from reducing grid electricity costs and providing fast-frequency response(FFR)ancillary services.A case study of a distribution centre in London,UK is showcased with the goal to identify which technologies can minimise total energy costs against a conventional system setup serving as a *** indicate the best technology configuration is a combination of lithium-ion batteries and mono-crystalline silicon PVs worth a total investment of ￡1.72 *** to the available space in the facility,the preferred PV capacity is 1.76 MW,while the battery system has a 1.06 MW power capacity and a 1.56 MWh energy *** PV performance varies across seasons,the solution indicates almost 30%of the energy used on-site can be supplied by PVs while achieving a carbon reduction of 26%.Nonetheless,PV and battery systems seem to be a questionable investment as the proposed solution has an 8-year payback,despite a 5-year NPV savings of ￡300k,implying there is still a performance gap for such systems to be massively deployed across the ***,the TSO model

关键词： photovoltaics Battery storage Optimization Distributed energy systems Commercial buildings MILP