The discovery of new materials for making cheap and efficient solar cells is the Holy Grail for solar panels industry. 

 Some recent findings represent a significant step towards achieving that goal.

new photovoltaic materials work just fine without any sunlight

 New photovoltaic materials work just fine without any sunlight

 Researchers at the Lawrence Berkeley National Laboratory, which is under the jurisdiction of the Department of Energy, and the University of California, Berkeley, recently announced that they have developed a new technology that can produce low-cost high-efficiency solar cells of almost any semiconductor material, including those who are present in larger quantities, such as metal oxides, sulfide and phosphide. These materials till now have been considered unstable for making solar cells because it is difficult to adjust their properties by chemical route.


  Current photovoltaic technology relies on rare and expensive semiconductor such as silicon crystals, thin layers of copper cadmium telluride or idnium Galen arsenide, which are either expensive or difficult to convert into a final product.

 -”It is time to start using and bad materials. Our technology allows us to bypass the problems that occur during chemical-tune the properties of materials that are non-toxic and has a massive scale in the country, by simply applying the electric field” – says Alex Zetl who along with colleague Feng Wang leads this research.
  The new technology is called screening-engineered field-effect photovoltaics (SFPV) because it uses the electric field, a phenomenon which is very well known and studied, while the concentration of the carriers of electricity in semiconductors changes in an electric field.

 With this SFVP technology, carefully designed input electrode allows the electric field in the gate electrode to significantly penetrate and evenly distributes the concentration of carriers and their type to create a p-n junction. This allows the creation of high-quality p-n junctions in semiconductors that would otherwise be difficult or impossible to connect with classical chemical methods.

PhotovoltaicMaterials

Photovoltaic Materials

In SFPV system, the structure of the front electrode is also designed to at least one of its dimensions is constant.

 For example, in a configuration with copper oxide, researchers at Berkeley have shaped electrode contact in the form of tiny fingers, while in another case, working with silicon, made ultra-thin contact (only one layer of grafen). With enough thin “fingers” the field in the gate creates an inversion layer with low electrical resistance between the “fingers” and a potential barrier under them. Uniformly thin contact allows the field at the gate to enter there easily tunes the carrier concentration, so get high-quality p-n junctions.

Views: 148

Tags: energies, energy, green, panels, power, renewable, solar

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Dan Antonioli replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Hi Hans, I don't know where you're located but where I am a 2.5 kw pv system costs closer…"
49 minutes ago
Hans Joachim Preiss replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"I use the combination of solar PV and heatpump water heaters in the vast majority of net-zero…"
2 hours ago
Amber Vignieri posted a blog post
6 hours ago
William Zwack added a discussion to the group Job Board
Thumbnail

Residental Energy Specialist: Washington, DC (or possibly telework)

Position Summary: CSRA Incorporated is searching for a Sr. Residential Building Energy Efficiency…See More
7 hours ago
Profile Iconteplie_poly, Gabriel Lieb and Beth Neri joined Home Energy Pros
7 hours ago
Shaun posted a discussion

Commercial duct testing

Hello all,I am a BPI BA, HERS rater and QC inspector. I cant find a ton of information on this…See More
7 hours ago
Dennis Heidner replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Dan, Solar PV and solar H2O work in northern climates...They can still provide the desired goal in…"
21 hours ago
Joseph Frederick added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Blower door Equipment for sale

Minneapolis Blower Door model 700, DG with cruise control. Hoses and manuals, door frame. Used once…See More
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service