Papers – Page 10 – TechConnect Briefs

Reduction of Collection Efficiency of Charge Carriers with Increasing Cell Size in Dye-Sensitized Solar Cell

Lee C-L, Lee W.H., Lee C-L, Lee W.H., Yang C-H, Yang H-H, Yang C-H, Yang H-H, National Cheng Kung University, TW

Changes in dye-sensitized solar cell performance related to active area size were investigated. The cell geometry was defined by introduction of a sub-electrode, which was uniform up to 4 cm2, and showed little change in [...]

Optical absorption enhancement of thin-film amorphous silicon induced by femtosecond laser pulses for solar cell fabrication

Kiani A., Venkatakrishnan K., Tan B., Ryerson University, CA

In this paper, we present a new method for direct-write laser fabrication of thin-film amorphous silicon (a-Si) on crystalline silicon substrate induced by femtosecond laser irradiation. Using megahertz frequency femtosecond laser pulses makes it possible [...]

Characterization of Microcrystalline and Amorphous Thin Film Silicon Devices with Raman Spectroscopy

Wall M., Hodkiewicz J., Thermo Fisher Scientific, US

Raman spectroscopy is highly sensitive to even slight changes in morphology of highly symmetrical, covalently bonded materials making it an ideal technique to characterize Silicon films. Furthermore, Raman spectroscopy is relatively insensitive to glass making [...]

CIGS PV Power Enhancement from Photonic Crystal Fiber Concentrators

Shepard S., Carver G., Louisiana Tech University, US

Two of the most promising means of reducing the cost per kilowatt of photovoltaic (PV) systems are: 1) to reduce the cost – which includes recent progress made in CIGS; and/or 2) to increase the [...]

Synthesis and characterization of Silver doped TiO2 nano films for

Murty V.V.S., Choudhry R.J., Deshore V., Government Autonomous Model Holkar Science College, IN

Utilization of Solar Energy is based on the ability of semiconductor particles to function as photo catalysts by promoting various oxidation and reduction reactions under sunlight. For the improvement of its catalytic capability, Silver doped [...]

The characterization of p-GaAs/i-InGaAsN/n-GaAs hetero-junction solar cell with various DMHy flow rates

Wu T.H., National Cheng Kung University, TW

Since the high efficiency tandem solar cell sturcture has been reported, the conversion efficiency of triple-junction solar cells would achieve 40% with concentrator. To further enhance the conversion efficiency of solar cells, the fourth-junction is [...]

Novel Building Integrated Solar Concentrators

Chatten A.J., Farrell D.J., Bose R., Dixon A., Poelking C., Gödel K.C., Mazzer M., Barnham K.W.J., Imperial College London, US

In developed countries 60% of the electricity consumed is attributable to commercial and public buildings. Even in the UK, the solar energy incident on buildings is more than 7x the electrical energy they consume. This [...]

Vertical-Axis Wind Turbines for Powering Cellular Communication Towers

Plourde B.D., Abraham J.P., Mowry G.S., University of St. Thomas, US

A vertical-axis turbine has been designed to power cellular communication towers. The turbine’s design is specifically focused on providing continuous power to manage the tower’s electronics without interfering with the tower structure. The design of [...]

A Smarter Grid enables Communal MicroGrids

Mohn T., General MicroGrids, Inc, US

As policy makers seek to integrate a serious sociological and environmental issue into energy production, the typical utility is faced with not only technology upgrades, but also dealing with new systemic events that occur far [...]

Expermental Study of CH4/H2 Mixtures in Internal Combustion Engines

Kahraman N., Albayrak Çeper B., Akansu S.O., Bayrak M., Erciyes University, TR

In this study, an experimental study on the performance of a spark ignition engine fuelled with CH4/ H2 mixtures (90%CH4 +10%H2 and80%CH4 +20%H2)was performed at different engine speed and different injection timing coefficient (ITC). This [...]