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Interface Functionalities in Multilayer Stack Organic Light Emitting Transistors (OLETs)

A multidisciplinary approach to understand the limitations of small molecule organic light emitting transistor here is described. The results showed a mean preferential alignment of the top semiconducting material (DH4T molecules) with the long axis perpendicular to the substrate, with a negligible change by 7° in the DH4T orientation between the heterojunction and the single layer benchmark configuration. This molecular organization is optimal for field-effect transport purposes. R. Capelli  et al., Advanced Functional Materials, 24, 35 (2014).

X-ray diffraction and near edge X-ray dichroic absorption with linearly polarised light were used to determine the unit cell packing and the molecular orientation at the active organic interfaces, as well as the amount of non-ordered domains. Moreover, chemical reactivity at the interfaces were measured by X-ray photoelectron spectroscopy.

 

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Interface Functionalities in Multilayer Stack Organic Light Emitting Transistors (OLETs), R. Capelli et al., Advanced Functional Materials, 24, 35 (2014)
 

Last Updated on Wednesday, 01 October 2014 09:29