A team of Florida State University materials researchers has developed a new type of light-emitting diode, or LED, using an organic-inorganic hybrid that could lead to cheaper, brighter and mass produced lights and displays in the future.
Assistant Professor of Physics Hanwei Gao and Associate Professor of Chemical Engineering Biwu Ma are using a class of materials called organometal halide perovskites to build a highly functioning LED. They lay out their findings in the journal Advanced Materials.
“Early work suggested perovskites could be a promising material to build LEDs,” Gao said. “But, the performance was not up to their potential. We believed there was significant room for improvement.”
Perovskites are any materials with the same type of crystal structure as calcium titanium oxide. Other researchers experimented with perovskites to build LEDs in the past but could not build particularly effective ones. Gao and Ma believed this organic-inorganic hybrid could perform better, if the formula could be appropriately tweaked.
“When we thought about this class of material, we knew it should perform better than this,” Ma said. “We came up with our novel approach to solve some critical problems and get a high-performance LED.”
After months of experiments using synthetic chemistry to fine-tune the material properties and device engineering to control the device architectures, they ultimately created an LED that performed even better than expected.
The material glowed exceptionally bright.
It is measured at about 10,000 candelas per square meter at a driving voltage of 12V — candelas are the unit of measurement for luminescence. As a benchmark, LEDs glowing at about 400 candelas per square meter are sufficiently bright for computer screens.
“Such exceptional brightness is, to a large extent, owing to the inherent high luminescent efficiency of this surface-treated, highly crystalline nanomaterial,” Gao said.
It was also quick and easy to produce.
Gao and Ma can produce the material in about an hour in the lab and have a full device created and tested in about half a day.
Additionally, while bare hybrid perovskites tend to be unstable in humid air, the nanostructured perovskites exhibit remarkable stability in ambient environment because of the purposely designed surface chemistry. Such chemical stability largely reduces the requirement of sophisticated infrastructure to produce this new type of LEDs and could be of huge benefit for cost-effective manufacturing in the future.
The research is crucial to the advance of LED technology, which is fast becoming an avenue to reduce the country’s electric consumption. LED lighting is already sold in stores, but widespread adoption has been slow because of the costs associated with the material and the quality.
But, LED lights do save energy.
According to the U.S. Department of Energy, residential LED lighting uses at least 75 percent less energy than regular incandescent lighting.
“If you can get a low cost, high performing LED, everyone will go for it,” Ma said. “For industry, our approach has a big advantage in that earth abundant materials can be processed in an economic way to make the products.”
The Latest on: LED
[google_news title=”” keyword=”LED” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: LED
- Diego Boneta-Led Thriller ‘El Gato’ Lands at Amazonon February 26, 2024 at 9:00 pm
The tech giant’s streaming service has ordered El Gato, based on the comic El Gato Negro by Richard Dominguez. Boneta ( Luis Miguel: The Series, the 2022 Father of the Bride) will play the title ...
- Bakersfield man sentenced to 10 years in prison for selling fentanyl that led to victim’s death: Dept. of Justiceon February 26, 2024 at 7:55 pm
A Bakersfield man was sentenced to 10 years in prison for distributing fentanyl that resulted in another person’s death, federal prosecutors said on Monday. Marcus Randall, 40, was sentenced to 10 ...
- Inkitt, a self-publishing platform using AI to develop bestsellers, books $37M led by Khoslaon February 26, 2024 at 5:01 pm
A startup called Inkitt believes that it can use AI to turn the strongest of these into blockbusters and to build a new "Disney" for the 21st century around that content. The startup's eponymous app ...
- Subway Cameras Led to Arrests in D Train Killing, Police Sayon February 26, 2024 at 4:25 pm
Investigators say that an early morning argument on a D train last week ended with the fatal shooting of William Alvarez, 45.
- US condemns ‘sham’ elections in Belarus, led by key Putin allyon February 26, 2024 at 3:20 pm
The United States branded the parliamentary and local elections in Belarus as a “sham” after only candidates loyal to the country’s leader were permitted to run. Preliminary results from the election ...
- Led by Luis Castillo, Mariners pitchers blank Reds for first Cactus League winon February 26, 2024 at 2:25 pm
Making his first start of the spring, right-hander Luis Castillo looked strong against his former team, tossing two hitless innings with a walk and a strikeout.
- Amy Schumer Says Comments On Her 'Puffier' Face Led To Cushing's Syndrome Diagnosison February 26, 2024 at 1:35 pm
Two days after her “Tonight Show” interview, Schumer responded to the discourse with a lengthy note on Instagram, noting that her “puffier than normal” face was the result of a previously disclosed ...
- Florida man who displayed toy gun at motorist, led authorities on chase pleads not guiltyon February 26, 2024 at 12:48 pm
A man facing several charges after a high-speed chase of over 120 mph led to the discovery of toy guns inside his SUV pleaded not guilty Monday.
- Coaches involved in Cam Newton fight reveal what led to altercation with NFL QB: 'Typical Cam'on February 26, 2024 at 10:36 am
TJ and Steph Brown, coaches for TopShelf Performance's 7v7 football team who were involved in a fight with Cam Newton on Sunday, say the former NFL MVP went too far with taunts.
- Amy Schumer says criticism of her face led to diagnosison February 26, 2024 at 7:36 am
"Aside from fears about my health, I also had to be on camera having the internet chime in. But thank God for that," Amy Schumer said. "Because that's how I realized something was wrong." ...
via Bing News