
Bruce Palmer/Florida State University
Assistant Professor of Physics Hanwei Gao and Associate Professor of Chemical Engineering Biwu Ma examine their LED material.
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.”
Read more: Researchers Create Cheaper, High Performing LED
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
- Unilumin Group Offered LED Displays and Integrated Metasight Solutions for the 19th Asian Gameson September 28, 2023 at 12:05 am
In this renowned international event, Unilumin Grou p, the global LED enterprise, provided a total area of more than 4200 square meters LED displays and integrated metasight (means the integration of ...
- How Hurricane Katrina led to a 50s diner in southern Minnesota farm countryon September 27, 2023 at 8:27 pm
It's not very often you come across a 50s diner in the middle of farm country. But you'll find exactly that at Kramer Farms in Dodge County.
- Family responds to video showing what led up to the deadly police shooting of Cleavon Mileson September 27, 2023 at 7:20 pm
The Police Department released police body camera video, surveillance video, and audio clips Wednesday showing what happened during an hours-long standoff between police and a man with a gun on top of ...
- Pilot error led to Alaska crash killing billionaire Petr Kellner, NTSB sayson September 27, 2023 at 4:33 pm
The March 2021 helicopter crash in Alaska that killed billionaire Petr Kellner and four others was likely caused by pilot error and inadequate training, a report by the U.S. National Transportation ...
- Odette Ramos shares journey that led her to become Baltimore's first Latina city councilmemberon September 27, 2023 at 3:08 pm
BALTIMORE - Odette Ramos made history as the first Latina elected to Baltimore City Council. In honor of Hispanic Heritage Month, WJZ spoke with Ramos about her Puerto Rican roots and the importance ...
- Blue city's rampant violence led this D.C. resident to flee the crime-ridden capitalon September 27, 2023 at 2:19 pm
A former Washington, D.C. resident moved in May 2022 to escape the city's rampant violent crime, high cost of living and strict COVID-19 restrictions.
- Report: Jon Moxley Injury On AEW Dynamite Led To Plans Being Changedon September 27, 2023 at 2:17 pm
Jon Moxley‘s injury forced AEW to change some plans on the spot. Jon Moxley suffered an injury on the September 22 episode of AEW Dynamite during his match against Rey Fenix. The injury reportedly ...
- Biden vetoes two Republican-led bills to undo protections for prairie bird, northern baton September 27, 2023 at 1:21 pm
President Joe Biden has vetoed Republican-sponsored bills intended to undo federal protections for two endangered species that have seen their populations plummet over the years: the lesser prairie ...
- Biden vetoes two Republican-led bills to undo protections for prairie chicken and northern baton September 27, 2023 at 9:49 am
President Joe Biden has vetoed Republican-sponsored bills intended to undo federal protections for two endangered species that have seen their populations plummet over the years: the lesser prairie ...
- French verification startup Ondorse just raised $4 million in a seed round led by Deezer investor Eurazeo with this 12-slide pitch deckon September 27, 2023 at 12:00 am
The Paris-based startup, founded in 2022, has built an array of tools to help businesses manage their know-your-customer (KYC) workflows ...
via Bing News