Dresden 2020 – scientific programme
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DS: Fachverband Dünne Schichten
DS 24: Layer Properties II: Optical Properties
DS 24.5: Talk
Wednesday, March 18, 2020, 12:00–12:15, CHE 91
Tuning of Optical Properties in Highly Conducting Perovskites — •Mahdad Mohammadi, Aldin Radetinac, Thorsten Schneider, Alexey Arzumanov, Philipp Komissinskiy, and Lambert Alff — Institute of Materials Science, Advanced Thin Film Technology, Technische Universität Darmstadt, Darmstadt
The demand for transparent, conducting materials (TCMs) has skyrocketed in the past decades and will further increase due to the development and commercial success of devices like LCDs, capacitive touchscreens and OLEDs. For most TCM applications, doped wide-bandgap semiconductors like ITO (In2O3:Sn) are used due to the very good transparency in the visible. However, the conductivity in doped semiconductors is limited by the solubility of dopant elements. Recently, a new type of material has gained attention for application as TCM. The perosvkites SrMO3 (M = V, Mo, Nb) are all highly conducting, with SrMoO3 (ρ = 5.1 µΩcm) even surpassing the electrode material platinum. In addition, a moderately enhanced electron correlation reduces the plasma frequency ωp and therefore induces transparency in large parts of the visible spectrum[1]. The scope of this work is to investigate the materials SrVO3, SrMoO3 and SrNbO3 and related compounds to evaluate how and to what extend the properties can be manipulated towards desired characteristics. For this purpose, epitaxial thin films were deposited via pulsed laser deposition and characterized regarding structural, chemical, optical and electrical properties.
[1]A. Radetinac et al., J. Appl. Phys., 119, 055302 (2016)