Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. Solar Energy News .




SOLAR DAILY
Dye-sensitized solar cells rival conventional cell efficiency
by Staff Writers
Lausanne, Switzerland (SPX) Jul 12, 2013


This is Michael Gratzel holding one of his dye-sensitized solar cells. Credit: EPFL.

Dye-sensitized solar cells (DSSCs) have many advantages over their silicon-based counterparts. They offer transparency, low cost, and high power conversion efficiencies under cloudy and artificial light conditions.

However, until now their overall efficiency has been lower than silicon-based solar cells, mostly because of the inherent voltage loss during the regeneration of the sensitizing dye.

In a Nature publication, EPFL scientists have developed a state solid version of the DSSC that is fabricated by a new two-step process raising their efficiency up to a record 15% without sacrificing stability.

The new solid-state embodiment of the DSSC uses a perovskite (CaTiO3) material as a light harvester and an organic hole transport material to replace the cell's electrolyte. Typical fabrication of this new DSSC involves depositing a perovskite material directly onto a metal-oxide film.

The problem is that adding the entire material together often causes wide variation in the morphology and the efficiency of the resulting solar cell, which makes it difficult to use them in everyday applications.

Michael Gratzel's team at EPFL has now solved the problem with a two-step approach: First, one part of the perovskite is deposited in to the pores of the metal-oxide scaffold. Second, the deposited part is exposed to a solution that contains the other component of the perovskite.

When the two parts come into contact, they react instantaneously and convert into the complete light-sensitive pigment, permitting much better control over the morphology of the solar cell.

The new method raises DSSC power-conversion efficiency up to a record 15%, exceeding the power conversion efficiencies of conventional, amorphous silicon-based solar cells.

The authors believe that it will open a new era of DSSC development, featuring stability and efficiencies that equal or even surpass today's best thin-film photovoltaic devices.

.


Related Links
Ecole Polytechnique Federale de Lausanne
All About Solar Energy at SolarDaily.com






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SOLAR DAILY
A new way to trap light
Boston MA (SPX) Jul 12, 2013
There are several ways to "trap" a beam of light - usually with mirrors, other reflective surfaces, or high-tech materials such as photonic crystals. But now researchers at MIT have discovered a new method to trap light that could find a wide variety of applications. The new system, devised through computer modeling and then demonstrated experimentally, pits light waves against light waves ... read more


SOLAR DAILY
Japan, China and South Korea account for 84 percent of the macroalgae patents

Bacteria from Salar de Uyuni in Bolivia conceal bioplastic

Gasification method turns forest residues to biofuel with less than a euro per liter

Newly developed medium may be useful for human health, biofuel production, more

SOLAR DAILY
ReconRobotics touts market position

Robot mom would beat robot butler in popularity contest

NASA's Polar Robotic Ranger Passes First Greenland Test

Autonomous Rover Drills Underground in the Atacama

SOLAR DAILY
Wind power does not strongly affect greater prairie chickens

UAE's Masdar eyeing more Britain offshore wind investments

Mafia turning to wind farms to launder money

O2 sells third wind farm to IKEA

SOLAR DAILY
New Catalyst replaceable platinum for electric-automobiles

France bans sale of latest Mercedes cars

China auto sales up 11.2% year-on-year in June

Dongfeng, Renault to set up $1.8 bn JV: media

SOLAR DAILY
Violence, bottlenecks threaten Iraq's new oil strategy

Stanford researchers say 'peak oil' concerns should ease

Treating oil spills with chemical dispersants: Is the cure worse than the ailment?

Big quakes trigger tremors at US oil and gas sites

SOLAR DAILY
Distant quakes trigger tremors at US waste-injection sites

Planned China nuclear plant axed after protest: report

Radioactivity found in Swiss lake near nuclear plant: report

Japan atomic watchdog suspects Fukushima ocean leak

SOLAR DAILY
DOE: climate change to affect energy

Protesters who scaled London's Shard released on bail

Energy-poor Jordan faces explosive electricity hikes

Toronto struggles to regain power after storm

SOLAR DAILY
Ivory Coast turns to brute force to save forests

Efficiency in the forest

Trees Using Water More Efficiently as Atmospheric Carbon Dioxide Rises

How Forests Cope with more Carbon Dioxide




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement