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Structural and Optical Properties of Group III-Nitride Quantum Wells Studied by (S)Tem and CL

  • H. Lakner (a1), Q. Liu (a1), G. Brockt (a1), A. Radefeld (a1), F. Schulze-Kraasch (a1) and F. Scholz (a2)...

Abstract

Wurtzite InGaN/GaN and AlGaN/GaN heterostructures grown on sapphire by metal organic vapor phase epitaxy were studied using scanning transmission electron microscopy (STEM), cathodoluminescence (CL) combined with secondary electron (SE) imaging, high resolution x-ray diffractometry (HRXRD), and atomic force microscopy (AFM).

SE imaging and AFM were used to study the surface morphology. The results indicate the presence of the following structural defects on the surface of InGaN/GaN heterostructures: hexagonal mesa-like structures, hexagonal pyramids and micropipes, while the surface of the AlGaN/GaN heterostructures are mirror-like smooth. The local optical properties of defects and defect free regions were studied using spatially resolved CL at low temperature. In addition, the dependence of the optical properties of both sorts of heterostructures on the quantum well width or chemical composition of ternary materials was investigated. The structural properties of the heterostructures were studied by STEM and HRXRD. Convergent beam electron diffraction (CBED) and corresponding simulations, convergent beam imaging (CBIM), and high resolution x-ray diffraction (HRXRD) were used to study the strained layers. Dislocations and interface properties were characterized using bright-field imaging, while the chemical compositions fluctuations were analyzed by Z-contrast imaging and energy dispersive x-ray microanalysis (EDX).

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[1] Nakamura, S., Mukai, T., and Senoh, M., Appl. Phys. Lett. 64, 1687 (1994).10.1063/1.111832
[2] Khan, M. A., Kuznia, J. N., Olson, D. T., Schaff, W. J., Burm, J. W., and Shur, M. S., Appl. Phys. Lett. 65, 1121, (1994).10.1063/1.112116
[3] Nakamura, S., Senoh, M., Nagahama, S., Iwasa, N., Yamada, T., Matsushita, T., Kiyoku, H., and Sugimoto, Y., Jpn. J. Appl. Phys. 35, L217 (1996).10.1143/JJAP.35.L217
[4] Ho, I-hsiu and Stringfellow, G. B., Appl. Phys. Lett. 69, 2701 (1996).10.1063/1.117683
[5] Scholz, F.,.Hdrle, V., Streuber, F., Sohmer, A., Bolay, H., Syganow, V., Dömen, A., Im, J. S., Hangleiter, A., Duboz, J. Y., Galtier, P., Rosencher, E., Ambacher, O., Brunner, D., and Lakner, H., Mat. Res. Soc. Symp. Proc. Vol.449, 314 (1997)
[6] Strite, S. and Morkoc, H., J. Vac. Sci. Technol. B 10, 1237 (1992).10.1116/1.585897
[7] Polyakov, A. Y., Shin, M., Freitas, J. A., Skowronski, M., Greve, D. W., Wilson, R. G., J. Appl. Phys. 80, 6349 (1996).
[8] Scholz, F.,.Härle, V., Streuber, F., Bolay, H., Douml;rnen, A., Kaufmann, B., Syganow, V., Hangleiter, A., J. Cryst. Growth 170, 321, (1997).10.1016/S0022-0248(96)00606-9
[9] Scholz, F.,.Härle, V., Bolay, H., Streuber, F., Kaufmann, B., Reyher, G., Dörnen, A., Gfrörer, O., Im, S.-J., and Hangleiter, A., Solid State Elec. 41, 141 (1997).10.1016/S0038-1101(96)00154-2
[10] Lakner, H., Liu, Q., Brockt, G., Radefeld, A., Meinert, A., and Scholz, F., will be published in Mater. Sci. & Eng. B (1997).
[11] Liu, Q., Lakner, H., Meinert, A., Scholz, F, Sohmer, A. and Kubalek, E., E-MRS'97, Straβbourg, France, 1620 June, (1997), will be published in Mater. Sci. & Eng. B (1997).
[12] Liu, Q., Prost, W., and Tegude, F. J., Appl. Phys. Lett. 67, 2807, (1995).10.1063/1.114791
[13] Lakner, H., Bollig, B., Ungerechts, S., and Kubalek, E., J. Appl. Phys. 29, 1767 (1996).
[14] Spence, J. C. H. and Zuo, J. M., Electron Microdiffraction, Plenum Press New York, (1992).10.1007/978-1-4899-2353-0
[15] Middleton, P. G., Trager-Cowan, C., Mohammed, A., O'Donnel, K. P., Van Der Stricht, W., Moerman, I. and Demeester, P., Mat. Res. Soc. Symp. Proc. Vol.449, (1997).
[16] Beaumont, B., Vaille, M., Boufaden, T., Jani, B. el, Gibart, P., J. Cryst. Growth 170, 316 (1997).
[17] Lakner, H., Brockt, G., Mendorf, C., J. Elec. Mat. 26, 11031108 (1997).10.1007/s11664-997-0002-2
[18] Narukawa, Y., Kawakami, Y., Shizuo, F., Mat. Res. Soc. Symp. Proc. Vol.449, (1997).
[19] Brockt, G., Mendorf, C., Radefeld, A., Scholz, F., and Lakner, H., Inst. Phys. Conf. Ser. No. 157, 221226, (1997).

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Structural and Optical Properties of Group III-Nitride Quantum Wells Studied by (S)Tem and CL

  • H. Lakner (a1), Q. Liu (a1), G. Brockt (a1), A. Radefeld (a1), F. Schulze-Kraasch (a1) and F. Scholz (a2)...

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