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S. Korean scientists develop new material for flexible, stretchable display

All Headlines 12:00 November 05, 2013

SEJONG, Nov. 5 (Yonhap) -- A group of South Korean scientists has developed a new material for flexible displays that can also be stretched, the science ministry said Tuesday.

The new material, developed jointly by scientists from Gyeongsang National University and Chung Ang University, is a polymer or plastic based semiconductor with the highest rate of charge carrier mobility to date that can be used in active mode organic light emitting diode (AMOLED) displays.

Charge carrier mobility is the speed at which the charge carriers move in the organic material, which determines how fast the device can be turned on and off.

Conventional displays require semiconductors with only a 0.5 or higher rate of charge carrier mobility, but AMOLED displays require carrier mobility of over 10.

The new polymer semiconductor has a carrier mobility of 12, the highest rate yet to be developed, according to the Ministry of Science, ICT and Future Planning.

The polymer semiconductor also costs less to be produced and has higher flexibility than silicon-based semiconductors that are currently used widely in AMOLED displays, it added.

"With the development of a new material with a carrier mobility of over 10 that is required for next-generation AMOLED displays, we are now a step closer to the commercialization of a new display that can be bent and also stretched," the ministry said in a press release.

The development of the polymer display has also been introduced in the September edition of the Journal of American Chemical Society under the title of Record High Mobility in Polymer Semiconductors via Side-Chain Engineering.


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