Effect of annealing temperature on the microstructure and photoluminescence of low resistivity Si/SiN/TaN thin films using magnetron sputtering |
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| Authors: | CK Chung TS Chen NW Chang MW Liao CT Lee |
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| Affiliation: | 1. Interdisciplinary Center Herzliya (IDC), Israel;2. The Open University of Israel, Ra''anana, Israel;3. Tel-Aviv University, Tel-Aviv, Israel;4. Weizmann Institute for Science, Rehovot, Israel;5. Istituto di Scienze dell''Atmosfera e del Clima — CNR, Bologna, Italy;1. Department of Physics and Graduate Institute of Applied Physics, National Taiwan University, Taipei 106, Taiwan;2. Graduate Institute of Materials Science and Engineering, Taipei 106, Taiwan;3. Department and Institute of Electrical Engineering, Minghsin University of Science and Technology, Hsinchu 30401, Taiwan;1. Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V., Department Berlin, Albert-Einstein-Straße 9, 12489 Berlin, Germany;2. Helmholtz-Zentrum Dresden-Rossendorf, Institut für Strahlenphysik/Institut für Ionenstrahlphysik und Materialforschung, Bautzner Landstr. 400, D-01328 Dresden, Germany;3. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Insitut für Si-Photovoltaik, Kekuléstr. 5, 12489 Berlin, Germany |
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| Abstract: | A lot of studies have been devoted to the porous Si, erbium-doped Si and Si-embedded in dielectric matrix of Si O or SiN together with long-time conventional furnace annealing. Besides, it is noted that these Si nanostructured films were highly resistive and non-conducting. In this paper, we have investigated the effect of annealing temperature on the microstructure and photoluminescence of low-resistivity Si/SiN/TaN nanocomposite thin films which are deposited by magnetron sputtering and followed by rapid thermal annealing (RTA). All samples are of luminescence and staying low resistivity at about 1462–2162 μΩ cm which increases with increasing annealing temperatures. The asymmetric broad photoluminescence (PL) peak covered the wavelengths of 400–700 nm. The wide visible PL spectra can be deconvoluted into three bands of blue (~ 455 nm), green-yellow (~ 525 nm), and orange emissions (~ 665 nm), which correspond to the emission origins from unsatisfied states in imperfections of interface between the Si:O and SiN:O, located states related to the mixed SiO or SiN bonds in SiN:O layer and nc-Si embedded in SiN:O matrix. The detailed mechanism of broad visible PL was investigated in terms of microstructure and bonding configuration evolution. The relationship between the annealing temperature, microstructure and PL behavior of Si/SiN/TaN multilayer films is discussed and established. |
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