Engineering

We are using organic semiconductors instead polymers

Organic semiconductors have gained the ability to carry electrical loads vertically, and not just along the polymer chains central of simplest form. Electricity flows through the inside of the plastic piece.Organic semiconductors are at the basis of most modern screens, made of OLEDs-or organic LEDs-and will be essential in emerging technologies, such as screens and flexible appliances and electronics, and a multitude of low-power devices.

Vasyl Skrypnychuk and his colleagues at the University of Umea, in Sweden, have discovered a way to align vertically the polymeric chains, which multiplied by several orders of magnitude the amount of cargo that can flow through the material, in addition to dispense with doping, the addition of extraneous elements to the polymer chain.

“The transport of electrical loads is greatly optimized only for control of polymer chain and the orientation of crystallites in the movie. The mobility measure was about 1000 times greater than what had already been achieved on the same organic semiconductor, “said professor David Barbero, Coordinator of the team.

Benefits of using organic semiconductors.

“We believe that these results will have an impact in the area of polymer solar cells and photodiodes, organic where the loads are transported vertically on the device. Organic-based devices have traditionally been slower and less efficient than the inorganic (e.g. made of silicon), in part due to the low mobility of loads on organic semiconductors.

“Typically, plastic semiconductors, which are just, have mobilities are semi-crystalline of positive charges about of 10000 times smaller than the doped silicon, which is used in electronic devices. Now we have demonstrated that it is possible to get a far greater mobility and a lot closer to the Silicon by controlling the alignment of vertical chain, and without doping”, said professor Barbero.