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A new theory to describe widely used material

One of the foremost usually used materials in organic physics is that the conducting compound PEDOT:PSS, and tens of thousands of scientific articles are printed relating the fabric and its properties. one in all the main benefits of PEDOT:PSS is that it conducts each ions and electrons, however a model that explains however this works has, until now, not been on the market. we all know that the fabric has many helpful properties, however we do not graspwhy.

Klas Tybrandt, PI within the Soft physics cluster at the Laboratory of Organic physics, field Norrköping, has developed a theoretical model for the interaction between particles and negatrons that explains however ion transport and electron transport square measure connected. The model has been printed within the journal Science Advances.

“Classical chemistry models have principally been utilized in the past for this sort of system, and this has light-emitting diode to a definite degree of confusion, since the models don’t embody the properties of semiconductors. we’ve used a strictly physical description that clarifies the ideas,” says Klas Tybrandt.

The material may be a mixture of a conductive compound and a compound that conducts ions. the 2 phases square measure mixed all the way down to the nanometer-scale, and even a skinny film contains a large variety of interfaces. At the contact surface between the electronic and therefore the ionic phases, what’s referred to asAssociate in Nursing “electrical double layer” forms, which suggests that a charge separation builds over herebetween ions and electrons.

Here we have combined semiconductor physics with a theory for (electrolytes and electrical double layers) and that we areready to describe the properties of the fabric on a theoretical basis. we’ve additionally experimental results showing that the model agrees with laboratory measurements,” says “Klas Tybrandt”.

PEDOT:PSS is one in all many chemical compound materials that act within the same method. exaggeratedunderstanding of the fabric and its distinctive properties may be a major advance for researchers in many areas of organic physics.

One such space is written physics, wherever it’s currently attainable to calculate and optimise the performance of electrochromic displays and transistors.

Another space that advantages from the new model is bioelectronics. Here, materials that conduct each ions and electrons square measure notably attention-grabbing, since they will couple the particle conducting systems of the body with the electronic circuits in, for instance, sensors.

“We will optimise the applications during a fully new method, currently that we tend to perceive however these materials work,” says Klas Tybrandt.

A third space is that the storage of energy in paper, a field during which LiU researchers square measure world-leaders.

“Understanding the quality of those polymers permits US to develop and optimise the technology. this can be one in all the areas for the recently opened Wallenberg Wood Science Center,” says Klas Tybrandt.

Main funding for the project has been provided by the Swedish analysis Council and therefore the Swedish government’s Strategic analysis space initiative into Advanced useful Materials at Linköping University.

The article Chemical potential-electric double layer coupling in conjugated polymer-polyelectrolyte blends, written by Klas Tybrandt, Igor V Zozoulenko and Magnus Berggren, Laboratory of Organic physics, Linköping University, has been printed in Science Advances.


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