Special Solar Panels Could Work When The Sun Goes Down

Special Solar Panels Could Work When The Sun Goes Down

A special kind of solar cell could work at night, researchers say.

In fact, the specially designed photovoltaic cell could generate up to 50 watts of power per square meter (about 10.75 square feet) under ideal conditions at night, about a quarter of what a conventional solar panel can generate in daytime, according to a concept paper in ACS Photonics.

Jeremy Munday, professor in the electrical and computer engineering department at the University of California, Davis, is developing prototypes of these nighttime solar cells that can generate small amounts of power. He and his collaborators hope to improve the power output and efficiency of the devices.

“You have to use different materials, but the physics is the same.”

Munday says that the process is similar to the way a normal solar cell works, but in reverse. An object that is hot compared to its surroundings will radiate heat as infrared light. A conventional solar cell is cool compared to the sun, so it absorbs light.

Space is really, really cold, so if you have a warm object and point it at the sky, it will radiate heat toward it. People have been using this phenomenon for nighttime cooling for hundreds of years. In the last five years, Munday says, there has been a lot of interest in devices that can do this during the daytime (by filtering out sunlight or pointing away from the sun).

There’s another kind of device called a thermoradiative cell that generates power by radiating heat to its surroundings. Researchers have explored using them to capture waste heat from engines.

“We were thinking, what if we took one of these devices and put it in a warm area and pointed it at the sky,” Munday says.

This thermoradiative cell pointed at the night sky would emit infrared light because it is warmer than outer space.

“A regular solar cell generates power by absorbing sunlight, which causes a voltage to appear across the device and for current to flow. In these new devices, light is instead emitted and the current and voltage go in the opposite direction, but you still generate power,” Munday says. “You have to use different materials, but the physics is the same.”

The device would work during the day as well, if you took steps to either block direct sunlight or pointed it away from the sun.

Because this new type of solar cell could potentially operate around the clock, it is an intriguing option to balance the power grid over the day-night cycle.

Original Study

books_technology

enafarzh-CNzh-TWdanltlfifrdeiwhihuiditjakomsnofaplptruesswsvthtrukurvi

follow InnerSelf on

facebook-icontwitter-iconrss-icon

 Get The Latest By Email

{emailcloak=off}

LATEST VIDEOS

How These Three Financial Firms Could Change The Direction Of The Climate Crisis
How These Three Financial Firms Could Change The Direction Of The Climate Crisis
by Mangulina Jan Fichtner, et al
A silent revolution is happening in investing. It is a paradigm shift that will have a profound impact on corporations,…
PBS Nova's Polar Extremes
PBS Nova's Polar Extremes
by PBS
In this two-hour special, renowned paleontologist Kirk Johnson takes us on an epic adventure through time at the polar…
A huge iceberg just broke off West Antarctica’s most endangered glacier
A Huge Iceberg Just Broke Off West Antarctica’s Most Endangered Glacier
by Madeleine Stone
Huge blocks of ice regularly shear away from Antarctica’s ice shelves, but the losses are speeding up.
The Rise Of Solar Power
by CNBC
Solar power is on the rise. You can see the evidence on rooftops and in the desert, where utility-scale solar plants…
World's Largest Batteries: Pumped Storage
by Practical Engineering
The vast majority of our grid-scale storage of electricity uses this clever method.
Hydrogen Fuels Rockets, But What About Power For Daily Life?
Hydrogen Fuels Rockets, But What About Power For Daily Life?
by Zhenguo Huang
Have you ever watched a space shuttle launch? The fuel used to thrust these enormous structures away from Earth’s…
Fossil Fuel Production Plans Could Push Earth off a Climate Cliff
by The Real News Network
The United Nations is beginning its climate summit in Madrid.
Big Rail Spends More on Denying Climate Change than Big Oil
by The Real News Network
A new study concludes that rail is the industry that's injected the most money into climate change denial propaganda…

LATEST ARTICLES

Why Australian Labor’s Climate Policy Is Too Little, Too Late
Why Australian Labor’s Climate Policy Is Too Little, Too Late
by Will Steffen
Opposition leader Anthony Albanese’s announcement on Friday that a Labor government would adopt a target of net-zero…
How These Three Financial Firms Could Change The Direction Of The Climate Crisis
How These Three Financial Firms Could Change The Direction Of The Climate Crisis
by Mangulina Jan Fichtner, et al
A silent revolution is happening in investing. It is a paradigm shift that will have a profound impact on corporations,…
Green Ammonia Could Slash Emissions From Farming And Power Ships Of The Future
Green Ammonia Could Slash Emissions From Farming And Power Ships Of The Future
by Bill David
For the past 100 years, a simple molecule has had an immensely positive impact on our world. Ammonia, which comprises…
Ideal US Cities To Survive Climate Change
Ideal US Cities To Survive Climate Change
by Johnna Crider
Climate scientists have shared where they think would be an ideal place to live in the United States in order to avoid…
Stories Of When Your Kids Make You Feel Old! | The Curls
Old Conservative White Men: Pass The Football To Someone Who Will Try To Score
by Robert Jennings, InnerSelf.com
We have had important US elections but this one in November 2020 is undoubtedly the most important. Why? America and…
How Tiny Microbes Are Revolutionizing Big Agriculture
How Tiny Microbes Are Revolutionizing Big Agriculture
by Mathew Wallenstein, Colorado State University
Walk into your typical U.S. or U.K. grocery store and feast your eyes on an amazing bounty of fresh and processed…
Uk’s Nuclear Future Hangs On Electricity Tax
Uk’s Nuclear Future Hangs On Electricity Tax
by Paul Brown
The new British prime minister, Boris Johnson, must soon decide whether to save the UK’s nuclear future with an…
Extreme Weather Could Push The U.S. Into Recession
Extreme Weather Could Push The U.S. Into Recession
by Karen Nikos
Physical climate risk from extreme weather events remains unaccounted for in financial markets, a new paper warns.