Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > News > Titania photovoltaic cell performance

December 20th, 2007

Titania photovoltaic cell performance

Abstract:
The high demand for efficient and inexpensive renewable energy sources is leading to increased research in organic photovoltaics. Among the different types of devices, dye-sensitized solar cells (DSSCs) based on porous titanium dioxide (TiO2) nanoparticle layers1 can achieve the highest efficiency, exceeding 10%. However, electron transport through a random TiO2 network is typically very slow.2 Improving its performance means developing novel organic dyes. Alternatively, replacing the TiO2 layer with one having a different nanostructure could also potentially achieve both improved charge transport and collection.

To this end, one could employ 1D nanostructures such as nanowires or nanotubes. Yet though 1D arrays enable simple pathways for electrons to reach electrodes, they also have smaller surface areas compared to random nanoparticle networks, thus leading to reduced performance. For example, the efficiency3 of 6.89% for an ∼20μm-long DSSC made of TiO2 nanotube arrays is still lower than that routinely achieved using a porous layer. Because increased surface areas can be obtained using longer nanotubes of smaller diameter, much effort has been invested in developing novel anodization procedures aimed at improving nanotube form and structure.3-6 Anodization conditions such as those determined by the type of electrolyte or the voltage applied, among others, measurably affect the morphology of the nanotubes (see Figure 1). However, the specific fabrication procedure employed also determines the crystal quality, as well as the defect types and densities, which in turn regulate charge transport.

Source:
spie.org

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Ultra-short pulse lasers & Positioning August 21st, 2014

Malvern’s Dr Alan Rawle talks TLAs in plenary lecture at Particulate Systems Analysis conference August 21st, 2014

Nanotubes/Buckyballs

Iranian Scientists Stabilize Protein on Highly Stable Electrode Surface August 14th, 2014

SouthWest NanoTechnologies Appoints Matteson-Ridolfi for U.S. Distribution of its SMW™ Specialty Multiwall Carbon Nanotubes August 13th, 2014

Immune cells get cancer-fighting boost from nanomaterials August 13th, 2014

SouthWest NanoTechnologies Inc. Announces $2.7 Million in New Financing to Fund Growth, Plant Expansion and Technical Personnel August 11th, 2014

Discoveries

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Shaping the Future of Nanocrystals: Berkeley Lab Researchers Obtain First Direct Observation of Facet Formation in Nanocubes August 21st, 2014

Water window imaging opportunity: A new theoretical study elucidates mechanisms that could help in producing coherent radiations, ultimately promoting high-contrast imaging of biological samples August 21st, 2014

Announcements

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Malvern’s Dr Alan Rawle talks TLAs in plenary lecture at Particulate Systems Analysis conference August 21st, 2014

Water window imaging opportunity: A new theoretical study elucidates mechanisms that could help in producing coherent radiations, ultimately promoting high-contrast imaging of biological samples August 21st, 2014

Energy

Chemical reaction yields "tapes" of porphin molecules: Flexible tapes from the nanoworld August 13th, 2014

Eco-friendly 'pre-fab nanoparticles' could revolutionize nano manufacturing: UMass Amherst team invents a way to create versatile, water-soluble nano-modules August 13th, 2014

“Active” surfaces control what’s on them: Researchers develop treated surfaces that can actively control how fluids or particles move August 6th, 2014

Used-cigarette butts offer energy storage solution August 5th, 2014

Solar/Photovoltaic

Eco-friendly 'pre-fab nanoparticles' could revolutionize nano manufacturing: UMass Amherst team invents a way to create versatile, water-soluble nano-modules August 13th, 2014

An Inkjet-Printed Field-Effect Transistor for Label-Free Biosensing August 11th, 2014

“Active” surfaces control what’s on them: Researchers develop treated surfaces that can actively control how fluids or particles move August 6th, 2014

New Material Allows for Ultra-Thin Solar Cells August 4th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE