Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

Photovoltaics and electrochemical cell combine to advance solar

RATE THIS! +55
Posted in Science on 26th Feb, 2016 10:59 AM by AlexMuller

Silicon solar cells are hampered by the fact that their efficiency falls off markedly at temperatures over 100C. Scientists combined perovskite-based solar cells that work at high temperatures with an electrochemical cell that allows the energy from ultraviolet light to be stored chemically.

 
Unlike a conventional cell, which converts light directly to electricity, the TU Wien system uses UV light to directly pump oxygen ions through a solid oxide electrolyte. According to the team, in operation the pump produces an open-current voltage of up to 920 millivolts at a temperature of 400° C (848° F).
 
It achieves this high temperature capability by swapping out the silicon-based photovoltaics with perovskites, which have shown tremendous potential in solar cell applications.
 
Georg Brunauer, whose doctoral thesis work while a student at TU Wein the research is based, says this would allow the solar cells to be used in large scale plants that concentrate sunlight onto the cells using mirrors while maintaining high conversion efficiency.
 
"Our cell consists of two different parts, a photoelectric part on top and an electrochemical part below," says Brunauer. "In the upper layer, ultraviolet light creates free charge carriers, just like in a standard solar cell. The electrons in this layer are immediately removed and travel to the bottom layer of the electrochemical cell.
 
Once there, these electrons are used to ionize oxygen to negative oxygen ions, which can then travel through a membrane in the electrochemical part of the cell. This is the crucial photoelectrochemical step, which we hope will lead to the possibility of splitting water and producing hydrogen."
 
According to Brunauer, the system is capable of being scaled up and with a slight increase in electrical power production it can go from merely pumping oxygen ions to splitting water into hydrogen and oxygen. In addition, it could even be used to split carbon dioxide into carbon monoxide. In this way, it could be used to not only generate electricity, but also to synthesize fuels.

Tags: solarsolar energypowerenergyhardwaresolar cell

Read original article » Back to category

Comments

Author: Guest
Posted: 2016-02-27
+1
Very interesting. What is new is that this system uses UV light to directly pump oxygen ions through a solid oxide electrolyte and the pump produces an open-current voltage of up to 920 millivolts at a temperature of 400° C.
1 Replies
Author: Guest
Posted: 2016-02-27
+0
This is definitely going to improve performance of silicon solar cells Reply
Reply
Author: Guest
Posted: 2016-12-26
+0
Good to see a tanlet at work. I can't match that. Reply


 

Recent headlines

  • Posted in Science on 2017-09-23 08:31:24
    Fly me to the Moon: For some, lunar village takes shape..read more
    Posted in Software on 2017-09-23 08:22:48
    One year later, Microsoft AI and Research grows to 8k.....read more
    Posted in Science on 2017-09-23 08:14:46
    Big Antarctic iceberg edges out to sea..read more
    Posted in Business on 2017-09-22 18:42:50
    To Achieve 100% Renewable Energy, We Need Way Better.....read more
    Posted in Medicine on 2017-09-22 18:31:20
    How the poliovirus can be used to battle lethal cancers..read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Scientists probe Neptune's depths to reveal secrets of icy.....read more
    Posted by AlexMuller
    New terahertz imaging approach could speed up skin cancer.....read more
    Posted by AlexMuller
    Rebutting the claim that antidepressants do not work..read more
    Posted by AlexMuller
    Artificial neural networks decode brain activity during.....read more
    Posted by AlexMuller
    Four Earth-sized planets detected orbiting the nearest.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me