Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 83: Heterostructures and Interfaces

O 83.7: Vortrag

Donnerstag, 10. März 2016, 11:30–11:45, H17

Structural and optical characterization of hybrid ZnO/polymer nanostructures fabricated by spin coating — •Stephanie Bley¹, Alejandra Castro-Carranza¹, Linus Krieg², Tobias Voss², and Jürgen Gutowski¹ — ¹Institute of Solid State Physics, Semiconductor Optics, University of Bremen, 28359 Bremen — ²Institute of Semiconductor Technology, Braunschweig University of Technology, 38106 Braunschweig

Hybrid core-shell nanowires with inorganic ZnO cores and organic p-conductive polymer shells have shown to possess a huge potential for the realization of efficient light-emitting or photovoltaic devices. A controlled deposition of the polymer shell is required to tailor the electronic and optical properties.

We show that spin-coating of planar ZnO layers and nanowires with poly(3,4-ethylenedioxythiophene) (PEDOT) is suitable to form hybrid heterojunctions. A thin polystyrene passivating interlayer is deposited in the hybrid structure. Its thickness is systematically modified to study its impact on defect state passivation, confirmed by the optical and electrical performance of the heterojunction. SEM and TEM characterization of the hybrid ZnO/polymer nanostructures show that conformal coating is possible. PL measurements confirm that the general optical properties of the ZnO have not been significantly changed after the coating process. A reduction of the defect luminescence of the ZnO is found for the passivated samples.