Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > News > Carbon nanotubes can double the efficiency of photoelectrochemical solar cells

February 27th, 2007

Carbon nanotubes can double the efficiency of photoelectrochemical solar cells

The photocatalytic activity of nanostructured semiconductor films has been widely explored in designing solar cells, solar hydrogen production, and environmental remediation. Of particular interest is the dye-sensitized solar cell (DSSC) which uses nanostructured titanium dioxide films modified with sensitizing dyes. Despite the initial success of achieving 10% solar conversion efficiency, the effort to further improve their performance has not been very successful. A major hurdle in attaining higher photoconversion efficiency in such nanostructured electrodes is the transport of electrons across the particle network. The photogenerated electrons in nanostructured films for example have to travel through the network of semiconductor particles and encounter many grain boundaries during the transit. Such a random transit path for the photogenerated electrons increases the probability of their recombination with oxidized sensitizer. With the recent advance in the design of nanotube and nanowire architecture, it should be possible to use such one-dimensional nanostructures to direct the flow of photogenerated charge carriers. The obvious challenge is to use nanowire or nanotube networks as support to anchor light-harvesting semiconductor particles and facilitate the electron transport to the collecting electrode surface in a solar cell. Researchers now have demonstrated that single wall carbon nanotube (SWCNT) architecture when employed as conducting scaffolds in a titanium dioxide semiconductor based photoelectrochemical cell can boost the photoconversion efficiency by a factor of 2.


Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press


Plasmons triggered in nanotube quantum wells: Rice, Tokyo Metropolitan scientists create platform for unique near-infrared devices March 16th, 2018

Big steps toward control of production of tiny building blocks March 9th, 2018

Nanotube fibers in a jiffy: Rice University lab makes short nanotube samples by hand to dramatically cut production time January 11th, 2018

Touchy nanotubes work better when clean: Rice, Swansea scientists show that decontaminating nanotubes can simplify nanoscale devices January 4th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Graphene oxide nanosheets could help bring lithium-metal batteries to market March 23rd, 2018

Piezomagnetic material changes magnetic properties when stretched March 22nd, 2018

Design approach developed for important new catalysts for energy conversion and storage: New method could aid in design of pharmaceuticals and optical and data storage materials March 21st, 2018

Leti and Inac Show Path to Creating Building Blocks of Quantum Processors With 28Si isotope in a CMOS Line: Fabrication of Isotopically Enriched, Industry-Compatible Wafers Points Way To Realizing Silicon Spin Quantum Bits with Enhanced Fidelity March 20th, 2018


RIT researchers improve fabrication process of nano-structures for electronic devices: Use of indium gallium phosphide with I-MacEtch processing shows promise for more cost effective fabrication and increased performance in devices from photonics to telecommunications March 20th, 2018

Monocrystalline silicon thin film for cost-cutting solar cells with 10-times faster growth rate fabricated: Controlling nano surface roughness of porous silicon March 20th, 2018

'Sweet spot' in sweet material for hydrogen storage: Study IDs 'white graphene' architecture with unprecedented hydrogen storage capacity March 12th, 2018

Converting CO2 into Usable Energy: Scientists show that single nickel atoms are an efficient, cost-effective catalyst for converting carbon dioxide into useful chemicals March 1st, 2018

Human Interest/Art

Weizmann Institute of Science Presents: Weizmann Wonder Wander - 4G - is Online June 21st, 2016

Call for NanoArt and Art-Science-Technology Papers June 9th, 2016

Scientists propose non-animal tools for assessing the toxicity of nanomaterials: Particle and Fibre Toxicology publishes recommendations from expert group meeting April 26th, 2016

Are humans the new supercomputer?Today, people of all backgrounds can contribute to solving serious scientific problems by playing computer games. A Danish research group has extended the limits of quantum physics calculations and simultaneously blurred the boundaries between mac April 14th, 2016

The latest news from around the world, FREE

  Premium Products
Only the news you want to read!
 Learn More
Full-service, expert consulting
 Learn More

Nanotechnology Now Featured Books


The Hunger Project