(b-d) Images of the organic metal, TATA, are shown with different imaging techniques. (e) X-ray scattering of a thin film of TATA. (f) Side view (i) and top view (ii) of the proposed stacking structure of TATA. Credit: Armao, et al. ©2014 American Chemical Society Although organic materials are often used as semiconductors, such as in organic LEDs and organic transistors, organic materials that have an electrical conductivity as high as that of metals are still very scarce. One problem with developing organic metals is that there is a tradeoff in terms of their crystalline structure: a high crystallinity is required for high conductivity, but is detrimental to the materials’ processability. Now in a new paper published in the Journal of the American Chemical Society, researchers Joseph J. Armao, IV, et al., at the University of Strasbourg in France, have demonstrated a way to overcome this problem by developing a new class of organic materials that are highly conductive yet very soft and flexible. When irradiated with a light pulse, the material reorganizes its molecules to correct structural defects. The new material can therefore be assembled with low crystallinity and then transformed via a light pulse into a material with high electrical conductivity. Read
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