Organic electronics is an emerging field of science and technology that represents a promising alternative to conventional electronics. Organic electronic devices are based on organic semiconductors, which combine attractive properties of organic materials with semiconducting behavior. The elementary excitation in these materials is a so-called “exciton” – a strongly bound pair of negative (electron) and positive (hole) charges. As a result, organic electronics essentially rely on exciton dynamics that have to be controlled and observed to ensure the development of high-efficient organic devices.
The Optical Condensed Matter Physics group (the Zernike Institute for Advanced Materials), together with colleagues from Princeton University (USA) and IMEC (Belgium), have recently made a step towards “watching” exciton dynamics in real-time within organic semiconductors. By utilizing a combination of state-of-the-art technological developments in thin film deposition, X-ray characterization, ultrafast spectroscopy, and computer modeling they developed a spectroscopic method to track the exciton dynamics in real time with unprecedented femtosecond accuracy. With this novel technique they demonstrated unusually efficient exciton diffusion in vacuum-deposited C70 fullerene layers, which is 10 times faster than in typical organic materials. The novel technique is deemed to pave the way to further development of efficient optoelectronic devices such as organic thin-film transistors, light-emitting transistors and lasers.
The results of this work are published in Physical Review Letters (O. V. Kozlov, F. de Haan, R. Kerner, B. P. Rand, D. Cheyns and M. S. Pshenichnikov, “Real-time tracking of singlet exciton diffusion in organic semiconductors”, Phys. Rev. Lett. 116, 057402, 2016
Photo report on the most special and oldest books of the university.
On Monday, November 26, UG researcher Anouk Goossens receives the Shell Award. This prize is awarded annually to three (former) physics students. Goossens receives the prize for her investigation into using the material Nb-doped SrTiO3 for imitating...
A bountiful and healthy Wadden Sea is an indispensable link in the life cycles of many migratory birds and fish. This is why the Wadden Fund and the three Wadden provinces – Groningen, Friesland and Noord-Holland – strive for the creation of such a...