Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 107: Poster: Emerging oxide semiconductors / Oxides other than ZnO and its relatives

HL 107.10: Poster

Donnerstag, 3. April 2014, 17:00–20:00, P1

Optical spectroscopy of doped Cu₂O thin films — •Julian Benz¹, Philipp Hering¹, Torsten Henning¹, Uwe Kaiser², Wolfram Heimbrodt², Bruno K. Meyer¹, and Peter J. Klar¹ — ¹I. Physikalisches Institut, Justus-Liebig-Universität, Heinrich-Buff-Ring 16, 35392 Gießen — ²Department of Physics and Material Sciences Center, Philipps-University of Marburg, Renthof 5, 35032 Marburg, Germany

Although the semicondutcing nature of cuprous oxide (Cu₂O) is already known since the early 20th century, little research was done besides studies of its excitonic properties. Recently the interest in Cu₂O, as a sustainable material, revived due to its potential use in photovoltaics. Here we report on the influence of doping on the optical properties of Cu₂O. We investigated series of RF sputtered thin films of Cu₂O doped with nitrogen and hydrogen, respectively. The photoluminesence (PL) of the samples was measured in a temperature range from 4 K to 300 K. The spectra will be interpreted with respect to the electrical properties. Furthermore the lifetime of the defect related luminescence was studied by means of time resolved PL spectroscopy. The results obtained are compared with those of a mechanical polished, natural Cu₂O single crystal.