Energy Technology|Energy Nepal|Power Kathmandu|Solar Power|Wind Power|Solar Energy|Wind Energy|Hydro Power|Hydro Energy|Power Generator|Air Conditioning System|Rectifier|UPS System|Voltage Stabilizer|Battery|Transformers
energyNP.com   Tel 9851-091-900 Email energyNP@hotmail.com
Menu

 
 
Energy Technology  
Back to Energy Technology List >>>
 

 
 
 Air Conditioner
 Battery
 Charger
 Cold Storage Room
 Electric Power Tools
 Electric Water Heater
 Garbage Disposal
 Station
 Generator
 Inverter
 Power Supply
 Rectifiers
 Self Priming Pump
 Solar Energy
 Solar Water Heater
 Transformer
 UPS
 Voltage Stabilizer
 Wind Energy
     
 
Voltage Stabilizer Nepal Kathmandu
 
Solar Water Heater Nepal Kathmandu
 
Electric Water Heater Nepal Kathmandu
 
Battery Charger Nepal Kathmandu
 
UPS Nepal Kathmandu
 
Complete Power Solution
 
Motio Sensor Wall Solar Light
 
Motio Sensor Wall Solar Light
 
  New Solar Cell Breaks Efficiency Ceiling, Theory Goes Out Window

 

If you thought the upper limit of solar cell efficiency was 32 percent in April, think again in May. Last week, MIT News reported on a research team that demonstrated how a silicon solar cell could top the theoretical limit of 32 percent. See you later, Shockley-Queisser Limit, and don’t let the door hit you on the way out.

To be clear, William Shockley and Hans J. Queisser can rest easy. The demonstration involved a silicon solar cell modded out with some other special material, so although MIT is pitching this as a theory-breaker, some people might prefer to mark it with an asterisk. Still, it’s a highly significant finding that could provide the silicon solar cell market with new life even as perovskites and other new solar cell variations emerge on the horizon.

MIT solar cell efficiency

Solar Cell Efficiency Gets The Heat Treatment

The key to the new solar cell efficiency breakthrough is something called thermophotovoltaics, in which carefully tailored materials are deployed to trap heat from the sun before it can reach the solar cell itself.

The extra materials then emit the heat in the form of thermal radiation, which is tuned to wavelengths that can be assimilated by the solar cell.

That's the short version. If you're looking for the full rundown you can find it in the journal Nature Energy under the title,"Enhanced photovoltaic energy conversion using thermally based spectral shaping." Here's a taste:

 








 

Here, we demonstrate enhanced device performance through the suppression of 80% of unconvertible photons by pairing a one-dimensional photonic crystal selective emitter with a tandem plasma–interference optical filter.

I know, right?

So Much For Solar Power Being Unreliable

Clean power foes are still clinging to the idea that solar energy is unreliable, a position that is becoming more and more ridiculous given the rapid progress in energy storage, smart grid technology, and related factors like advanced weather modeling.

The new solar cell breakthrough makes the naysayers look even more ridiculous, by opening up the potential for high efficiency solar conversion even on cloudy days. The extra material — a combination of nanophotonic crystals and vertically aligned carbon nanotubes, to be precise — acts as a mini onboard solar thermal storage unit, smoothing out dips and spikes as clouds pass across the sun.

The thermal element also provides a convenient bridge for pairing the new solar cell with standalone thermal energy storage systems.

The team worked with carbon nanotubes because they are “virtually a perfect absorber” of the color spectrum, enabling the new solar cell to capture all of the solar energy that hits it in the form of heat. As the heat is re-emitted in the form of light, the crystals convert it to colors that enable the photovoltaic material to close in on its peak efficiency.

Breaking the theoretical maximum is quite complicated, as the system requires a concentrating solar system to maintain high heat, and an optical filter to sort the desired wavelengths out from the undesirable ones.

That leads to the question of whether the cost is worth the effort, but the researchers anticipate that the system could be deployed to reduce lifecycle costs of concentrating solar systems, by managing heat generation and reducing the risk of damage.

What Now, Peter Thiel And Donald Trump?

Don’t hold your breath for that new solar cell to hit the market. The new research is a step or two above the proof-of-concept stage, and it describes an early-stage demonstration (see photo at the top of this article) using a low efficiency photovoltaic cell.

The result was an overall efficiency of 6.8 percent, which hardly sounds earth shattering (let alone ceiling-breaking), but the key point is that the figure of 6.8 was a real-life match for the team’s prediction.

Here’s researcher David Bierman describing the significance, as cited by MIT News

“…This is the first time we’ve actually put something between the sun and the PV cell to prove the efficiency” of the thermal system. Even with this relatively simple early-stage demonstration, Bierman says, “we showed that just with our own unoptimized geometry, we in fact could break the Shockley-Queisser limit.

As for what this all has to do with Peter Thiel, the tech tycoon has been all over the news this week for his secretive funding of the Hulk Hogan “sex tape” lawsuit against Gawker Media. Thiel is also well known for encouraging other tech tycoons to invest in software rather than putting up Benjamins for clean tech R&D efforts like this one.

We bring this up because Thiel is an active supporter of presumptive Republican nominee Donald Trump in his quest to become President of the United States. One could assume that if Trump wins the office, Thiel would be in a position to amplify his message to investors and public policy makers.

On the other side, presumptive Democratic nominee Hillary Clinton has carved out a slot for increasing public dollars for solar innovation in her ambitious slate of clean power proposals.

Just saying.

May 31st, 2016 by Tina Casey [Cleantechnica]

Photo: via MIT News, courtesy of the researchers.

 
 
Solar Water Heater Nepal Kathmandu Solar Energy Nepal Kathmandu Wind Power Nepal Kathmandu Power Generator Nepal Kathmandu Voltage Stabilizer Nepal Kathmandu Transformer Nepal Kathmandu AirConditioner Nepal Kathmandu Battery Nepal Kathmandu UPS System Nepal Kathmandu Rectifier Nepal Kathmandu
 
 
Link: The Official Portal of Goverment of Nepal Nepal Electricity Authority Nepal Alternative Energy Promotion Centre Nepal Telecom Nepal Department of Agriculture Nepal Department of Industry wow Nepal! Nepal Global Buying SIMONES Industries|Nepal Power Solution
  Nepal Goverment Nepal Electricity Authority Nepal Alternative Energy Promotion Centre Nepal Telecom Nepal Department of Agriculture Nepal Department of Industry wow-Nepal | Nepal Global Buying SIMONES Industries |Nepal Power Solution
 
Fair: Investment Summit Nepal Himalayan Hydro Expo Nepal Kathmandu China International Import Expo China Import and Export Fair China-South Asia Exposition Guangzhou Int’l Refrigeration, Air-Condition, Ventilation, Air-Improving Equipment Exhibition Guangzhou International Solar Photovoltaic Exhibition Asia Battery Sourcing Fair
  Investment Summit Nepal Himalayan Hydro Expo Nepal China International Import Expo China Import and Export Fair China-South Asia Exposition Int'l Refrigeration, Air-Condition Fair Int'l Solar Photovoltaic Exhibition Asia Battery Sourcing Fair
 
Copyright @ 2014 All right reserved. Simones Industries