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Breakthrough Could Launch Organic Electronics Beyond Cellphone Screens


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Researchers used ultraviolet light to excite molecules in a semiconductor.

A discovery by an international team of researchers from Princeton University, the Georgia Institute of Technology, and Humboldt University in Berlin points the way to more widespread use of organic electronics.

Credit: Jing Wang and Xin Lin

An international team of researchers from Princeton University and elsewhere could potentially advance the use of organic electronics by facilitating a breakthrough in organic semiconductors.

Princeton's Xin Lin says these materials suffer from relatively poor electrical conductivity, which can lead to problems and inefficient devices.

"We are working on new ways to improve the electrical properties of these organic semiconductors," Lin says.

The team has specified a strategy for significantly boosting organic semiconductors' conductivity via the use of a "hyper-reducing dopant," which is derived from a ruthenium compound. Studies at Princeton have found the dopant increased the materials' conductivity about 1 million-fold, using a process to add energy by irradiating the compound with ultraviolet light.

The researchers also found the higher electrical conductivity level was sustained even when the light was cut off, with doping continuously reactivated by the light generated by the material when it was incorporated into light-emitting diodes.

From Princeton Engineering News
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Abstracts Copyright © 2017 Information Inc., Bethesda, Maryland, USA


 

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