category » Energy

Reducing Recombination Losses in Planar Organic Photovoltaic Cells Using Multiple Step Charge Separation
  • Organic photovoltaics (OPVs) are promising low-cost solar cells: they can be stacked in multi-junctions, and they are compatible with roll-to-roll…


Anomalous Singlet Exciton Fission Magnetic Field Effect in Diphenyltetracene-C60 Solar Cells
  • Singlet exciton fission may find application in more efficient solar cells. Fission can reduce thermalization losses because by splitting the…


Ternary Mixtures for Improved Performance in P3HT/PCBM Bulk Heterojunction Solar Cells
  • Photovoltaic cells containing nanoscale phase separated mixtures of a poly(thiophene) donor and a fullerene acceptor in the active layer have…


Improved Current Extraction from Colloidal Quantum Dot Photovoltaics Using Metal Oxide Transport Layers
  • Solar cells based on lead sulfide colloidal quantum dots (PbS QDs) have demonstrated recent improvements in both efficiency and stability…


Paper-thin and Paper-based Organic Photovoltaics
  • There is emerging interest in the ability to produce low-cost and lightweight solar cells and other electronics on flexible, stretchable,…


Transparent Organic Photovoltaics for Window Applications
  • The low energy density of solar illumination necessitates deployment of solar technologies over large surface areas in order to capture…


Integration of Cobalt-based Catalyst with Silicon Photoanodes to Achieve Photo-assisted Water Oxidation
  • Transformation of solar energy into chemical fuels is an attractive energy conversion transformation to address the intermittency of power generation…


Transistors with Steep Subthreshold Characteristics Based on Impact Ionization on Narrow Bandgap Semiconductors
  • Achieving a sharp subthreshold swing is crucial to enable the supply voltage scaling that is necessary for reducing power consumption…


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


Single-Chamber Deposition of Multilayer Barriers
  • Protective coatings that prevent the ingress of water into electronic devices fabricated on flexible plastic substrates are essential to extend…


Piezoelectric Transducers for Advanced Ultrasound Imagining Systems and Energy Harvesting
  • In this project, a piezoelectric 2-D array of ultrasound transducers will be developed for compact, portable 3-D ultrasound imaging systems….


Design of Low-frequency, Low-g, Nonlinear Resonating Piezoelectric Energy Harvesters
  • To overcome the limitations of piezoelectric energy harvesters such as narrow bandwidth and low power density, our group has recently…


Graphene Photovoltaics
  • Organic photovoltaics (OPV) has gained much attention as a possible candidate for the next generation of clean electricity due to…


Integrated Inductors for Power Electronics
  • Passive components, namely inductors, transformers, and capacitors, are often the largest and most expensive components in power electronic circuits, and…


Graphene Ambipolar Electronics for RF Applications
  • Graphene is a one-atom-thick layer of carbon atoms arranged in a honeycomb lattice through sp2 bonding [1] . Considered for…


Solar Thermoelectric Generator for the developing world
  • With nearly 1.6 billion people living without electricity, the demand for small-scale distributed power generation is high. In developing countries,…


Thermal Energy Harvesting Light Sources
  • We are investigating thermoelectric transport in light-emitting diodes (LEDs). Electro-luminescent cooling is a phenomenon in which the optical output power…


Wearable Thermoelectric Generators
  • There exists great interest in the utilization of the human body as a possible power supply for running such electronics…


Silicon Nanowire Arrays for Energy Storage Devices
  • Material properties are defined not only by the composition, but by structure as well. Such materials are suited for use…


Growth and Characterization of Carbon Nanotube Carpets for Electrochemical Applications
  • Improvements in electrochemical devices for energy storage (Li-based batteries and ultracapacitors), and capacitive deionization are being aggressively investigated. There are…


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…


Advanced Photoelectrodes for Photo-assisted Water Electrolysis
  • With continuously growing energy demands, new alternative energy solutions become essential. In order to achieve sustainability, efficient conversion and storage…


CNT–based Field Ionization Micro Vacuum Pumps
  • This project aims to develop the technology for field-enabled low-power portable vacuum sources that can be made cheaply and reliably,…


Electron-impact-ionization Pump Using Double-gated Isolated Vertically Aligned Carbon Nanotube Arrays
  • There is a need for microscale vacuum pumps that can be readily integrated with other MEMS and electronic components at…


High-flux Pool Boiling with Micro-engineered Surfaces
  • The mechanism of critical heat flux (CHF) is commonly attributed to two limits during boiling behavior: 1) the hydrodynamic limit…


Templated Placement of Colloidal Quantum Dots
  • Semiconductor quantum dots (QDs) are electronically-quantized systems with promising applications in optoelectronic devices [1] . A key aspect of such…


Understanding the Role of Self-absorption on the Trapping Efficiency of Luminescent Solar Concentrators
  • Luminescent Solar Concentrators (LSCs) aim to reduce the cost of solar electricity by using an inexpensive collector to concentrate solar…


Cascaded Energy Transfer for Efficient Broadband Pumping of High-quality Micro-lasers
  • Many on-chip optical applications, including spectroscopy [1] ; sensing [2] [3] ; nonlinear optics [4] [5] [6] ; and optical…


Effect of Electron Spin on OPV Recombination
  • Organic photovoltaics (OPVs) are promising low-cost solar cells: they can be stacked in multi-junctions, and they are compatible with roll-to-roll…


Glass-based Luminescent Solar Concentrator
  • Photovoltaic solar concentrators aim to increase the electrical power obtained from solar cells.  Conventional solar concentrators track the sun to…