Growth of Bulk Gallium Nitride Single Crystal by Sodium Flux Method: A Brief Review

Main Article Content

Nurul Fatihah Nik Sin
Kamarulazizi Ibrahim
Norzaini Zainal

Abstract

Growing interest in homoepitaxial growth of nitride-based devices has driven considerable efforts towards producing bulk gallium nitride single crystal as a substrate for the devices. Therefore, the process of producing the bulk gallium nitride crystal substrate should be simple and yet cost-effective to reduce the production cost of the devices. To date, several methods of growing bulk gallium nitride crystal have been proposed. Sodium flux method is one of the most promising ways since it requires a moderate growth temperature and growth pressure, as well as being simple and cost-effective. This paper will briefly review the progress made to advance the growth of bulk gallium nitride single crystal by sodium flux method, including discussing challenges and proposing possible improvements in future.

Article Details

How to Cite
Growth of Bulk Gallium Nitride Single Crystal by Sodium Flux Method: A Brief Review. (2019). Journal of Physical Science, 30(2), 189-208. https://doi.org/10.21315/
Section
Articles

References

Park, J. et al. (2016). Dependence of adhesion strength between GaN LEDs and sapphire substrate on power density of UV laser irradiation. Appl. Surf. Sci., 384, 353–359, https://doi.org/10.1016/j.apsusc.2016.05.078.

Compound Semiconductor. (2016). Sapphire substrate continues to dominate LED market. LED Journal, 19 April. Retrieved 10 January 2017 from http://www.ledjournal.com/main/news/sapphire-substrate-continues-to-dominate-led-market/.

Tanikawa, T. et al. (2018). Three-dimensional imaging of threading dislocations in GaN crystals using two-photon excitation photoluminescence. Appl. Phys. Expr., 11, 031004-1-031004-4, https://doi.org/10.7567/APEX.11.031004.

Kim, J. et al. (2014). Influence of V-pits on the efficiency droop in InGaN/GaN quantum wells. Opt Expr., 22, A857–A866, https://doi.org/10.1364/OE.22.00A857.

Jie-Jun, W. et al. (2015). GaN substrate and GaN homo-epitaxy for LEDs: Progress and challenges. Chin. Phys. B, 24, 068106-1-068106-10.

Weyers, M. et al. (2008). GaN substrates by HVPE. Proc. SPIE, 6910, 691001, https://doi.org/10.1117/12.764405.

Fujito, K. et al. (2009). Bulk GaN crystals grown by HVPE. J. Cryst. Growth, 310, 3011–3014, https://doi.org/10.1016/j.jcrysgro.2009.01.046.

Grzegory, I. et al. (2006). Growth of bulk GaN by HVPE on pressure grown seeds. Proc. SPIE., 6121, 612107, https://doi.org/10.1117/12.645976.

Lee, H. Y. et al. (2014). The control of mechanical bow for GaN substrate grown by HVPE with relatively longer radius of lattice curvature. Phys. Stat. Sol. C, 11, 477–482, https://doi.org/10.1002/pssc.201300514.

Foronda, H. M. et al. (2016). Curvature and bow of bulk GaN substrates. J. Appl. Phys., 120, 035104-1-035104-7, https://doi.org/10.1063/1.4959073.

Boćkowski, M. et al. (2011). High nitrogen pressure solution growth of bulk GaN in “feed-seed” configuration. Phys. Stat. Sol. A, 208, 1507–1510, https://doi.org/10.1002/pssa.201000981.

Pimputkar, S. et al. (2014). Improved growth rates and purity of basic ammonothermal GaN. J. Cryst. Growth, 403, 7–17, https://doi.org/10.1016/j.jcrysgro.2014.06.017.

Hashimoto, T. et al. (2014). Ammonothermal bulk GaN growth and its processing. Sens. Mater., 26, 385–392.

Masuda, Y. et al. (2016). Convection patterns and temperature fields of ammonothermal GaN bulk crystal growth process. Jpn. J. Appl. Phys., 55, 05FC03-1-05FC03-3, http://doi.org/10.7567/JJAP.55.05FC03.

Kawamura, F et al. (2009). Growth of GaN single crystals with extremely low dislocation density by two-step dislocation reduction. J. Cryst. Growth, 311, 3019–3024, https://doi.org/10.1016/j.jcrysgro.2009.01.125.

Imade, M. et al. (2014). Growth of bulk GaN crystals by the Na-flux point seed technique. Jpn. J. Appl. Phys., 53, 05FA06-1-05FA06-5.

Yamane, H. et al. (1997). Preparation of GaN single crystals using a Na flux. Chem. Mater., 9(2), 413–416, https://doi.org/10.1021/cm960494s.

Imade, M. et al. (2012). Centimeter-sized bulk GaN single crystals grown by the Na-flux method with a necking technique. Cryst. Growth Des., 12, 3799–3805, https://doi.org/10.1021/cg300643r.

Zhou, M. et al. (2014). Growth of GaN crystals by the Na flux method under a temperature gradient. J. Electron. Mater., 43, 1219–1225, https://doi.org/10.1007/s11664-014-2996-6.

Kawamura, F. et al. (2006). Growth of a two-inch GaN single crystal substrate using the Na flux method. Jpn. J. Appl. Phys., 45, L1136–L1138, https://doi.org/10.1143/JJAP.45. L1136.

Mori, Y. et al. (2012). Growth of bulk GaN crystal by Na flux method under various conditions. J. Cryst. Growth, 350, 72–74, https://doi.org/10.1016/j.jcrysgro.2011.12.026.

Mori, Y. et al. (2011). Growth of bulk GaN crystals by Na flux method. Phys. Status Sol. C, 8, 1445–1449, https://doi.org/10.1002/pssc.201000911.

Yamane, H. et al. (1998). Morphology and characterization of GaN single crystals grown in a Na flux. J. Cryst. Growth, 186, 8–12, https://doi.org/10.1016/S0022-0248(97)00480-6.

Hageman, P. R. et al. (2004). N-type doping of wurtzite GaN with germanium grown with plasma-assisted molecular beam epitaxy. J. Cryst. Growth, 267, 123–128, https://doi.org/10.1016/j.jcrysgro.2004.03.024.

Aoki, M. et al. (2001). Growth conditions and morphology of GaN single crystals fabricated by the Na flux method. J. Ceram. Soc. Jpn., 109, 858–862, https://doi.org/10.2109/jcersj.109.1274_858.

Yamane, H. et al. (2000). GaN single crystal growth from a Na-Ga melt. J. Mater. Sci., 35, 801–808.

Aoki, M. et al. (2000). Growth of GaN single crystals from a Na-Ga melt at 750°C and 5 MPa of N2. J. Cryst. Growth., 218, 7–12, https://doi.org/10.1016/S0022-0248(00)00518-2.

Yamada, T. & Yamane, H., (2006). Seeded growth of GaN single crystals by Na flux method using Na vapor. Jpn. J. Appl. Phys., 45, L898–L900.

Kawamura, F. et al. (2002). Synthesis of bulk GaN single crystals using Na-Ca flux. Jpn. J. Appl. Phys., 41, L1440–l1442.

Kawamura, F. et al. (2003). Growth of transparent, large size GaN single crystal with low dislocations using Ca-Na flux system. Jpn. J. Appl. Phys., 42, L729–L731.

Kawamura, F. et al. (2008). Effect of carbon additive on increases in the growth rate of 2 in GaN single crystals in the Na flux method. J. Cryst. Growth, 310, 3946–3949, https://doi.org/10.1016/j.jcrysgro.2008.06.008.

Imade, M. et al. (2010). Growth of large GaN single crystals on high-quality GaN seed by carbon-added Na flux method. Appl. Phys. Expr., 3, 075501-1-075501-3, https://doi.org/10.1143/APEX.3.075501.

Von Dollen, P. et al. (2016). A new system for sodium flux growth of bulk GaN. Part I: System development. J. Cryst. Growth., 456, 58–66, https://doi.org/10.1016/j.jcrysgro.2016.07.044.

Uedono, A. et al. (2017). Vacancy-type defects in bulk GaN grown by the Naflux method probed using positron annihilation. J. Cryst. Growth., 475, 261–265, https://doi.org/10.1016/j.jcrysgro.2017.06.027.

Semiconductor Today. (2015). Demand for larger diameters to boost GaN substrate market from $2.2bn in 2014 to $4bn by 2020. Retrieved 15 February 2017 from http://www.semiconductor-today.com/news_items/2015/sep/industryarc_030915.shtml.