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Growth of InN and In-Rich InGaN Layers on GaN Templates by Pulsed Metalorganic Chemical Vapor Deposition

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Abstract

InN and In-rich InGaN layers have been grown on GaN templates using the pulsed metalorganic chemical vapor deposition (MOCVD) technique and compared with analogous layers grown by conventional MOCVD. Structural investigations were performed using x-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Surface morphology was studied using atomic force microscopy. Electrical and optical properties were studied using Hall measurements and photoluminescence (PL) spectroscopy. All layers were free of metal droplets. InN grown using pulsed MOCVD showed fairly low background electron concentration (n e = 8 × 1018 cm−3 to 9 × 1018 cm−3) and high electron mobility (μ e = 644 cm2 V−1 s−1). Structural studies revealed increase of size (from 100 nm to 500 nm) and decrease of density of InN islands at higher growth temperatures. For In-rich InGaN layers (In content 68% and 80%) the density of islands was similar to that in InN, while the diameter varied from 50 nm to 150 nm. Inhomogeneities of In and Ga distribution in the layers resulting in broadened XRD lines and PL bands are discussed.

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Acknowledgements

This work was supported by projects NEWLED (EC FP7 #318388) and HEISEC (Nordic Energy Research).

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Authors and Affiliations

  1. Institute of Applied Research, Vilnius University, Saulėtekio ave. 10, 10223, Vilnius, Lithuania

    A. Kadys, T. Malinauskas, T. Grinys, M. Dmukauskas, J. Mickevičius, J. Aleknavičius, R. Tomašiūnas & S. Stanionytė

  2. Semiconductor Physics Department, Faculty of Physics, Vilnius University, Saulėtekio ave. 9-III, 10222, Vilnius, Lithuania

    J. Mickevičius & J. Aleknavičius

  3. Department of Characterization of Materials Structure, Institute of Chemistry, Centre for Physical Sciences and Technology, Savanoriu ave. 231, 02300, Vilnius, Lithuania

    A. Selskis, R. Kondrotas & S. Stanionytė

  4. OSRAM Opto Semiconductors GmbH, Leibnizstr. 4, 93055, Regensburg, Germany

    H. Lugauer & M. Strassburg

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  1. A. Kadys
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  2. T. Malinauskas
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  3. T. Grinys
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  4. M. Dmukauskas
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  12. M. Strassburg
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Correspondence to A. Kadys.

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Kadys, A., Malinauskas, T., Grinys, T. et al. Growth of InN and In-Rich InGaN Layers on GaN Templates by Pulsed Metalorganic Chemical Vapor Deposition. J. Electron. Mater. 44, 188–193 (2015). https://doi.org/10.1007/s11664-014-3494-6

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  • DOI: https://doi.org/10.1007/s11664-014-3494-6

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