Fiber OLEDs, Thinner Than a Hair
January 9, 2018 | KAISTEstimated reading time: 1 minute
Professor Kyung Cheol Choi from the School of Electrical Engineering and his team succeeded in fabricating highly efficient Organic Light-Emitting Diodes (OLEDs) on an ultra-thin fiber.
The team expects the technology, which produces high-efficiency, long-lasting OLEDs, can be widely utilized in wearable displays.
Existing fiber-based wearable displays’ OLEDs show much lower performance compared to those fabricated on planar substrates. This low performance caused a limitation for applying it to actual wearable displays.
In order to solve this problem, the team designed a structure of OLEDs compatible to fiber and used a dip-coating method in a three-dimensional structure of fibers. Through this method, the team successfully developed efficient OLEDs that are designed to last a lifetime and are still equivalent to those on planar substrates.
The team identified that solution process planar OLEDs can be applied to fibers without any reduction in performance through the technology. This fiber OLEDs exhibited luminance and current efficiency values of over 10,000 cd/m^2(candela/square meter) and 11 cd/A (candela/ampere).
The team also verified that the fiber OLEDs withstood tensile strains of up to 4.3% while retaining more than 90% of their current efficiency. In addition, they could be woven into textiles and knitted clothes without causing any problems.
Moreover, the technology allows for fabricating OLEDs on fibers with diameters ranging from 300㎛ down to 90㎛, thinner than a human hair, which attests to the scalability of the proposed fabrication scheme.
Noting that every process is carried out at a low temperature (~105℃), fibers vulnerable to high temperatures can also employ this fabrication scheme.
Professor Choi said, “Existing fiber-based wearable displays had limitations for applicability due to their low performance. However, this technology can fabricate OLEDs with high performance on fibers. This simple, low-cost process opens a way to commercialize fiber-based wearable displays.”
Suggested Items
I-Connect007 Editor’s Choice: Five Must-Reads for the Week
05/10/2024 | Marcy LaRont, PCB007 MagazineSpring is a renewal each year as dormant flora bloom, and baby ducklings and geese are ever present in local bodies of water. Even though it is beginning to get hot, I love this time of year in Arizona, with the sun waking me around 5 a.m. It fills me with an energy that I often lose in the dark winter months. Wherever you find yourself in the world, I hope you are enjoying Spring and that you are filled with energy and enthusiasm for all the great work part of our daily lives in this industry.
Samsung Acquires Sonio; Strengthens Position in Cutting-Edge Medical Devices
05/10/2024 | SamsungSamsung Medison, a global medical equipment company and an affiliate of Samsung Electronics, today announced it has signed an agreement to acquire 100% of the shares of Sonio SAS, a fetal ultrasound AI software company.
Schweizer Receives Future Prize from Ewald Marquardt Private Foundation for p² Pack Embedding Technology
05/10/2024 | Schweizer Electronic AGAs the number of electric vehicles increases, so do the demands on electrical power management in vehicles. To make power generation and engine operation more efficient, Schweizer Electronic AG's p² Pack technology offers a long-term and sustainable solution to better convert and even recover the energy generated.
MKS’ Atotech to Participate in ECTC
05/10/2024 | MKS’ AtotechAt this year’s 74th IEEE Electronic Components and Technology Conference (ECTC), MKS’ Atotech will present and demonstrate its latest product and service innovations.
TTM Technologies Appoints Wajid Ali to Board of Directors
05/10/2024 | TTM Technologies, Inc.TTM Technologies, Inc. announced that Mr Wajid Ali has been appointed by the unanimous vote of the remaining Directors to serve as a new Class I director on the Board, effective immediately.