Connect with us

Hi, what are you looking for?

CleanTechnica
“We could take a silicon solar panel with a lab record efficiency of converting sunlight to electricity of 25 per cent, add a perovskite layer, and boost the power generation by a fifth,”

Clean Power

Perovskite Layer Could Boost Solar Cell Efficiency By 20%

“We could take a silicon solar panel with a lab record efficiency of converting sunlight to electricity of 25 per cent, add a perovskite layer, and boost the power generation by a fifth,”

Originally published on Solar Love.

Sam Stranks, an experimental physicist at Cambridge University, is a firm believer in the power of solar energy to dramatically reduce global carbon emissions. “Solar could well be the solution to our energy needs and getting rid of emissions,” he says. “It’s an infinite source, but expensive to harvest.” Stranks thinks instead of just installing more solar panels, we should focus on making panels that are more efficient. One way to do that is to add a perovskite layer to today’s commercially available solar panels.

Perovskite is a mineral coating that is applied directly to a typical solar cell to boost its efficiency. “We could take a silicon solar panel with a lab record efficiency of converting sunlight to electricity of 25 per cent, add a perovskite layer, and boost the power generation by a fifth,” says Stranks. “For a solar cell, the maximum efficiency is around 30 per cent – but with one of these perovskite ‘tandem’ layers it could go up to around 50 per cent.”

The thin crystalline films are made by mixing two readily available salts without the need for costly high-temperature processing. “They could cost half of their silicon counterparts,” Stranks says. “In just three years, the efficiency has hit 21 per cent and rising — whereas conventional silicon took 30 years to get to that stage. You can inkjet print it; you can spool off reels like newsprint. And half a cup of the ‘ink’ would make enough perovkite solar panels to power a home.” Early commercial applications, he suggests, are likely in 2017. “Hybrid perovskites over the past three years have become nearly as efficient as silicon. You get solar cells that are so light they can be suspended on a soap bubble.

Stranks’ enthusiasm has to be tempered with some unpleasant realities. Keith Emery, who compiles the National Renewable Energy Laboratory’s solar cell efficiency data, explains why perovskites need a disclaimer. “The samples degrade very quickly to zero. They degrade fast enough that it has prevented intercomparing results among groups or even having an independent efficiency measurement.” Light, air and water are all kryptonite to perovskites, according to NASDAQ.com. Silicon cells are far more durable. The best way to preserve them so they last long enough to be commercially viable is to encapsulate them, but that adds weight and cost, reducing their competitive price advantage claims Yuanyuan Zhou, PhD candidate at Brown University’s School of Engineering.

There is no doubt that more efficient solar panels would help lower the cost of solar power. The question is whether perovskite technology can move out of the lab and become commercially viable.

Source: Wired UK

Reprinted with permission.

 
 
Appreciate CleanTechnica’s originality and cleantech news coverage? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

Advertisement
 
Written By

Steve writes about the interface between technology and sustainability from his homes in Florida and Connecticut or anywhere else the Singularity may lead him. You can follow him on Twitter but not on any social media platforms run by evil overlords like Facebook.

Comments

You May Also Like

Clean Power

The answer isn't tech, it's chem.

Research

Scientists From NREL, CU-Boulder, University of Toledo Collaborate on Improved Formula Scientists at the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) have...

Clean Power

Green hydrogen is going down in cost, and concentrating solar power could pick up the pace by ditching electrolysis in favor of a thermochemical...

Clean Power

Solar energy has barely scratched the surface of its potential to decarbonize the global economy in time to avert catastrophic warming.

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.