category » Energy

Chemomechanics of Fuel-cell-related Materials
  • Solid oxide fuel cells (SOFCs) directly convert chemical to electrical energy with high efficiency and can operate using a wide…


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Silicon Nanowires for Chemical Sensing Systems
  • Silicon nanowires (NWs) have attracted immense interest for sensing applications due to their high surface-to-volume ratio. In particular, field-effect-based chemical…


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Carbon Nanotube/Nanofiber Electrodes for High-energy Rechargeable Li-O2 Batteries
  • Recently, Li-O2 batteries have attracted much attention as potential next-generation alternatives to lithium-ion batteries for electric vehicle energy storage [1]…


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Fabrication of Si Nanowire-based Capacitors for Power Management
  • Capacitors with high capacitance density (capacitance per footprint area) have potential applications in autonomous microsystems and for power management in…


Catalytic Oxygen Storage Materials
  • Combustion of fossil fuels, essential for electricity generation and vehicular propulsion, is generally incomplete, leading to harmful NOx, CO, and…


Direct Solar-to-hydrogen Conversion: Low-cost Photoelectrodes
  • With continuously growing energy demands, new alternative energy solutions become essential. In order to achieve sustainability, efficient conversion and storage…


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Silicon Nanowires for Energy Storage in Microsystems
  • Micro-batteries provide a critical component for self-powered autonomous microsystems.  Lithium-ion batteries provide relatively high energy storage capacities.  Significant improvement in…


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Improved Carbon Nanotube Ultracapacitor Electrodes for Storage and Filtering
  • Due to their mechanical, thermal, and electrical properties and their natural ability to grow on a variety of metallic and…


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Simulation of Two-dimensional Core-shell Structures for Broadband Solar Cell Absorption
  • Solar cells with broadband absorption and large acceptance angle are demonstrated by using two-dimensional core-shell structures, which are composed of…


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Photonic Crystals on Erbium-doped Tellurite Thin Films for Broadband-enhanced Photoluminescence at near Infrared
  • Two-dimensional photonic crystals (PhCs) are fabricated using dual-beam focused ion beam (FIB) in Er3+-TeO2 thin films and demonstrate broadband enhancement…


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Graphene as Transparent Conducting Electrodes in Organic Photovoltaics: Studies in Graphene Morphology, Hole Transporting Layers, and Counter Electrodes
  • Due to the remarkable physical properties of graphene, applications in various areas such as transistors [1] , chemical sensors [2]…


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Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
  • The photoresponse of semiconductors, which determines the performance of optoelectronic devices, is governed by energy relaxation pathways of photoexcited electron-hole…


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Superlattice-Source Nanowire FET with Steep Subthreshold Characteristics
  • Achieving a sharp subthreshold swing is crucial to enable the supply voltage scaling that is necessary to reducing power consumption…


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InAsP Graded Buffers for Thermophotovoltaic Devices
  • Semiconducting alloys of InxGa1-xAs, GaAsySb1-y, and InAszP1-z can be fabricated to exhibit band gaps between 0.5 and 1.0 eV, which…


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High-efficiency, Low-cost Photovoltaics using III-V on Silicon Tandem Cells
  • Photovoltaics and sustainability have received much attention lately. We seek a tandem photovoltaic device using silicon as both the substrate…


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ZnO Nanowire Arrays/Conductive Polymer Hybrid Solar Cells with Interfacial layer
  • Organic/inorganic hybrid solar cells based on the integration of conductive polymers into semiconducting nanowire arrays offer opportunities for the development…


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Decoupled Cantilever Arms for Highly Versatile and Sensitive Thermal Measurements
  • Microfabricated cantilever beams are used in microelectromechanical systems (MEMS) for a variety of sensor and actuator applications. Bimaterial cantilevers accurately…


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Thin-Film Crystalline Silicon Solar Cells Enabled by Sub-micrometer Surface Light-Trapping Structures
  • The cost of silicon solar cells has fallen precipitously in recent years, primarily as a result of manufacturing improvements, increasing…


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Recombination Dynamics of Charge Carriers in Nanostructured Solar Cells
  • Nanostructured solar cells are attracting increasing attention as a promising photovoltaic (PV) technology [1] . Generation of free charge carriers…


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Ligand Exchange for Performance Optimization of Lead Sulfide Quantum Dot Photovoltaics
  • Solar cells based on lead sulfide quantum dots (PbS QDs) represent a promising new class of solution-processable photovoltaics. The highly…


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Stabilized CdSe-CoPi Composite Photoanode for Light-Assisted Water Oxidation by Transformation of Thin-Film CdSe/Cobalt Metal
  • Water oxidation is the thermodynamically demanding step of the water-splitting reaction. Efficient sunlight-driven water splitting into molecular oxygen and hydrogen…


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Solution-Processed Nanowire-based Quantum Dot Photovoltaics
  • Thin-film solar cells incorporating colloidal quantum dot active layers have recently emerged as a notable third-generation photovoltaic (PV) technology, largely…


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Development of p-i-n Heterojunction Quantum Dot (QD) Solar Cells
  • Disordered semiconductors exhibit poor electronic transport properties due to their amorphous nature. Low carrier mobility and lifetime limits the diffusion…


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Solution Processed Bulk Heterojunction PbS:ZnO Solar Cells
  • Colloidal lead sulfide quantum dot (PbS QD) solar cells have recently shown attractive improvements in efficiency [1]. PbS QDs have…


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Intermolecular Coupling Controls Singlet Fission
  • Singlet fission, a process that converts a singlet exciton into two triplet excitons, has the potential to achieve a high-efficiency…


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Understanding Modulation of Photocurrent with Applied Magnetic Field in Singlet Fission, Pentacene, Photodetectors
  • Organic solar cells and photodetectors that feature singlet exciton fission materials have two additional exciton processes that traditional organic solar…