Nav: Home

Textile-fiber-embedded multiluminescent device for future wearable devices

March 31, 2020

Dr. Soon Moon Jeong's research team in the Division of Energy Technology at DGIST has developed a new structure of luminescence technology. This will enable the production of light-emitting elements that overcome the limitations of existing methods, expecting to greatly help improve the efficiency of light-emitting elements used in various ways such as billboards and banners.

Light emitting devices need electrodes to transmit energy to the light emitting layer. The 'flat electrode' used here is an electrode consists of a coplanar structure surrounding the light emitting layer, which has limitation as the light emitted from the light emitting layer is blocked by the electrode. The decreasing flexibility of the electrodes was also an obstacle to manufacturing a flexible light emitting device that emits light constantly.

To overcome these limitations, Dr. Jeong's team cross-inserted a new type of electrode made of fibers inside the light emitting layer unlike existing light emitting devices, through which they could develop a new light-emitting technology using an in-plane electric field generated in parallel to the light-emitting layer. The light-emitting device produced this way improved efficiency significantly by emitting light more flexibly and stably than the existing light-emitting devices.

Dr. Jeong's research team applied a new luminescent film using zinc sulfide (ZnS) and polydimethylsiloxane (PDMS) to the luminescent layer while using the in-plane electric field. Through this, they made possible at the same time the mechanoluminescence (ML) which generates light by applying mechanical force and electroluminescence (EL) which generates light by operating the electric field. While it was not possible in the conventional light emitting devices, this new technology could maintain constant and efficient light intensity in various environments.

The light-emitting device developed this time provided important clues to overcome various limitations of the existing light-emitting device. First, the structure of light emitting device developed by Dr. Jeong's team solved the problem of the existing light emitting device in which electrodes are inserted into the light emitting layer and block light. By doing so, the research team also solved at once the disadvantage that thick electrodes needed to further increase the light intensity of light emitting device rather blocking the light of the light emitting layer between them.

Dr. Jeong in the Division of Energy Technology said "We want to change the paradigm of related industries in the future through the development of devices that emit light constantly, despite any changes of forms. This is definitely possible if we improve the light emitting device further, and it is expected to be used in various forms of light emitting textile and wearable devices."

This research finding was published on the latest issue of Materials Today, a world-renowned international journal in materials engineering. This research was conducted with the support of DGIST and the mid-carrier researcher support project carried out by the Ministry of Science and ICT.
-end-


DGIST (Daegu Gyeongbuk Institute of Science and Technology)

Related Technology Articles:

Technology innovation for neurology
TU Graz researcher Francesco Greco has developed ultra-light tattoo electrodes that are hardly noticeable on the skin and make long-term measurements of brain activity cheaper and easier.
April's SLAS Technology is now available
April's Edition of SLAS Technology Features Cover Article, 'CURATE.AI: Optimizing Personalized Medicine with Artificial Intelligence'.
Technology in higher education: learning with it instead of from it
Technology has shifted the way that professors teach students in higher education.
Post-lithium technology
Next-generation batteries will probably see the replacement of lithium ions by more abundant and environmentally benign alkali metal or multivalent ions.
Rethinking the role of technology in the classroom
Introducing tablets and laptops to the classroom has certain educational virtues, according to Annahita Ball, an assistant professor in the University at Buffalo School of Social Work, but her research suggests that tech has its limitations as well.
The science and technology of FAST
The Five hundred-meter Aperture Spherical radio Telescope (FAST), located in a radio quiet zone, with the targets (e.g., radio pulsars and neutron stars, galactic and extragalactic 21-cm HI emission).
AI technology could help protect water supplies
Progress on new artificial intelligence (AI) technology could make monitoring at water treatment plants cheaper and easier and help safeguard public health.
Transformative technology
UC Davis neuroscientists have developed fluorescence sensors that are opening a new era for the optical recording of dopamine activity in the living brain.
Do the elderly want technology to help them take their medication?
Over 65s say they would find technology to help them take their medications helpful, but need the technology to be familiar, accessible and easy to use, according to research by Queen Mary University of London and University of Cambridge.
Technology detecting RNase activity
A KAIST research team of Professor Hyun Gyu Park at Department of Chemical and Biomolecular Engineering developed a new technology to detect the activity of RNase H, a RNA degrading enzyme.
More Technology News and Technology Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Listen Again: Meditations on Loneliness
Original broadcast date: April 24, 2020. We're a social species now living in isolation. But loneliness was a problem well before this era of social distancing. This hour, TED speakers explore how we can live and make peace with loneliness. Guests on the show include author and illustrator Jonny Sun, psychologist Susan Pinker, architect Grace Kim, and writer Suleika Jaouad.
Now Playing: Science for the People

#565 The Great Wide Indoors
We're all spending a bit more time indoors this summer than we probably figured. But did you ever stop to think about why the places we live and work as designed the way they are? And how they could be designed better? We're talking with Emily Anthes about her new book "The Great Indoors: The Surprising Science of how Buildings Shape our Behavior, Health and Happiness".
Now Playing: Radiolab

The Third. A TED Talk.
Jad gives a TED talk about his life as a journalist and how Radiolab has evolved over the years. Here's how TED described it:How do you end a story? Host of Radiolab Jad Abumrad tells how his search for an answer led him home to the mountains of Tennessee, where he met an unexpected teacher: Dolly Parton.Jad Nicholas Abumrad is a Lebanese-American radio host, composer and producer. He is the founder of the syndicated public radio program Radiolab, which is broadcast on over 600 radio stations nationwide and is downloaded more than 120 million times a year as a podcast. He also created More Perfect, a podcast that tells the stories behind the Supreme Court's most famous decisions. And most recently, Dolly Parton's America, a nine-episode podcast exploring the life and times of the iconic country music star. Abumrad has received three Peabody Awards and was named a MacArthur Fellow in 2011.