Scientists from the University of Nova Gorica Are the World Leaders in Organic Electronics
On 21 June this year, the prestigious journal “Nature Nanotechnology” published an article, in which an international team of researchers from the University of Nova Gorica, the University of Strasbourg (France), the CNRS (France), and the Humboldt University (Berlin, Germany) described the results of an experimental study. Basing on this study, it was found out that the precisely matched combination of a semiconducting polymer and photoactive molecules allowed the production of a highly efficient optical memory element. It is configured to save and delete information using light and not an electrical circuit as usual. One cell composed of such memory elements can store up to 256 times more information than existing memory elements.
At the same time, these cells use the advantages offered by organic electronics. They are relatively simple to manufacture, flexible and useful, for example, in the manufacture of wearable electronics, electronic paper and other advanced electronic devices based on the organic semiconducting materials.
A memory element is manufactured as a polymeric electrical switch. The polymers are supplemented with the photoactive molecules that when exposed to light can change their shape, which leads to a change in electrical current through the switch. The scientists found out that under a certain combination of these molecules and a polymer, information can be saved to the memory element with a green light, and deleted — with an ultraviolet one. By using short laser pulses, they managed to record 256 various statuses on a single memory element. According to the number of bits, this corresponds to eight classic memory elements. A new memory element could capture more than 70 cycles of saving and deleting, and the data thereon remained saved for more than 500 days. This element also possesses an excellent mechanical strength since, being made on a plastic film, it is capable of withstanding more than a thousand folds.
The published results are a many-year brainchild of a joint group of researchers in organic electronics. This is a remarkable discovery, which promises the development of new optoelectronic devices.
Publishing the article strengthens the leading position of the University of Nova Gorica among Slovenian universities. (ung.si). In the field of organic electronics research, the University of Nova Gorica is the leader of the global ranking and the only Slovenian research institution that has reached such outstanding outcomes.
The original article in English: “Flexible non-volatile optical memory thin-film transistor device with over 256 distinct levels based on an organic bicomponent blend”
Tim Leydecker, Martin Herder, Egon Pavlica, Gvido Bratina, Stefan Hecht, Emanuele Orgiu and Paolo Samorì
Nature Nanotechnology (2016), DOI: 10.1038/nnano.2016.87
Link to the article: nature.com
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