Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 30: Poster 2

HL 30.21: Poster

Donnerstag, 8. September 2022, 11:00–13:00, P3

Copper tin oxide: An amorphous ternary oxide with tunable optical and electrical properties — •Arne Jörns, Holger von Wenckstern, and Marius Grundmann — University of Leipzig, Felix Bloch Institute for Solid State Physics, Semiconductor Physics Group

Due to the mismatching crystal structures of copper oxide (CuO) and stannic oxide (SnO₂) an amorphous alloy can form when these materials are combined. Few reports show that the resulting alloy exhibits p-type behavior, but low hole mobility results in unreliable Hall measurements [1]. Nevertheless, optical and electrical properties can be tuned by the alloy composition.

In this work we investigated copper tin oxide thin films deposited by pulsed laser deposition of ceramic CuO and SnO₂ targets at room temperature and in oxygen atmosphere. The resulting samples are highly disordered and n-type semiconducting with room temperature mobilities up to 11 cm²V⁻¹s⁻¹. Optical and electrical properties can be tuned in a wide range by varying composition ratio and chamber pressure. Temperature dependent Hall-measurement for different cation contents and a first approach on Schottky diodes will be reported.

[1] P. J. M. Isherwood et al., J. Appl. Phys., 118, 105702, 2015