Publications

Found 28 results
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2016
Malkowski, T. F., S. Pimputkar, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Acidic ammonothermal growth of gallium nitride in a liner-free molybdenum alloy autoclave", Journal of Crystal Growth, vol. 456: North-Holland, pp. 21–26, 2016.
Sintonen, S., P. Kivisaari, S. Pimputkar, S. Suihkonen, T. Schulz, J. S. Speck, and S. Nakamura, "Incorporation and effects of impurities in different growth zones within basic ammonothermal GaN", Journal of Crystal Growth, vol. 456: North-Holland, pp. 43–50, 2016.
Suihkonen, S., S. Pimputkar, J. S. Speck, and S. Nakamura, "Infrared absorption of hydrogen-related defects in ammonothermal GaN", Applied Physics Letters, vol. 108, no. 20: AIP Publishing, pp. 202105, 2016.
Von Dollen, P., S. Pimputkar, M. Abo Alreesh, H. Albrithen, S. Suihkonen, S. Nakamura, and J. S. Speck, "A new system for sodium flux growth of bulk GaN. Part I: System development", Journal of Crystal Growth, vol. 456: North-Holland, pp. 58–66, 2016.
Von Dollen, P., S. Pimputkar, M. Abo Alreesh, S. Nakamura, and J. S. Speck, "A new system for sodium flux growth of bulk GaN. Part II: in situ investigation of growth processes", Journal of Crystal Growth, vol. 456: North-Holland, pp. 67–72, 2016.
Pimputkar, S., S. Nakamura, and J. S. Speck, Reactor vessels for ammonothermal and flux-based growth of group-iii nitride crystals, 2016.
Griffiths, S., S. Pimputkar, J. S. Speck, and S. Nakamura, "On the solubility of gallium nitride in supercritical ammonia–sodium solutions", Journal of Crystal Growth, vol. 456: North-Holland, pp. 5–14, 2016.
Pimputkar, S., T. F. Malkowski, S. Griffiths, A. Espenlaub, S. Suihkonen, J. S. Speck, and S. Nakamura, "Stability of materials in supercritical ammonia solutions", The Journal of Supercritical Fluids, vol. 110: Elsevier, pp. 193–229, 2016.
2015
Pimputkar, S., J. S. Speck, S. Nakamura, and S-ichiro. Kawabata, Ammonothermal growth of group-III nitride crystals on seeds with at least two surfaces making an acute, right or obtuse angle with each other, 2015.
2014
Von Dollen, P., S. Pimputkar, and J. S. Speck, "Es werde Licht–mit Galliumnitrid: der Nobelpreis für Physik 2014", Angewandte Chemie, vol. 126, no. 51: Wiley Online Library, pp. 14198–14200, 2014.
Von Dollen, P., S. Pimputkar, and J. S. Speck, "Let There Be LightóWith Gallium Nitride: The 2014 Nobel Prize in Physics", Angewandte Chemie International Edition, vol. 53, no. 51: Wiley Online Library, pp. 13978–13980, 2014.
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Reactor designs for use in ammonothermal growth of group-III nitride crystals, feb # " 4", 2014.
Pimputkar, S., D. Shane Kamber, J. S. Speck, and S. Nakamura, Reactor designs for use in ammonothermal growth of group-iii nitride crystals, 2014.
2013
Pimputkar, S., P. Von Dollen, S. Nakamura, and J. S. Speck, Apparatus used for the growth of group-iii nitride crystals utilizing carbon fiber containing materials and group-iii nitride grown therewith, 2013.
Von Dollen, P., J. S. Speck, and S. Pimputkar, Crystal growth using non-thermal atmospheric pressure plasmas, 2013.
DenBaars, S. P., D. Feezell, K. Kelchner, S. Pimputkar, C-C. Pan, C-C. Yen, S. Tanaka, Y. Zhao, N. Pfaff, R. Farrell, et al., "Development of gallium-nitride-based light-emitting diodes (LEDs) and laser diodes for energy-efficient lighting and displays", Acta Materialia, vol. 61, no. 3: Pergamon, pp. 945–951, 2013.
Pimputkar, S., and J. S. Speck, Growth of bulk group-iii nitride crystals after coating them with a group-iii metal and an alkali metal, 2013.
Pimputkar, S., P. M. Von Dollen, J. S. Speck, and S. Nakamura, Use of alkaline-earth metals to reduce impurity incorporation into a group-iii nitride crystal grown using the ammonothermal method, apr # " 25", 2013.
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Using boron-containing compounds, gasses and fluids during ammonothermal growth of group-III nitride crystals, 2013.
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Using boron-containing compounds, gasses and fluids during ammonothermal growth of group-iii nitride crystals, 2013.
2012
Pimputkar, S., J. S. Speck, and S. Nakamura, Group-iii nitride crystal ammonothermally grown using an initially off-oriented non-polar or semi-polar growth surface of a group-iii nitride seed crystal, 2012.
2011
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Addition of hydrogen and/or nitrogen containing compounds to the nitrogen-containing solvent used during the ammonothermal growth of group-iii nitride crystals, sep # " 1", 2011.
Pimputkar, S., S. Kawabata, J. Speck, and S. Nakamura, "Bulk GaN Growth on GaN Seeds of Varying Orientations in Supercritical Basic Ammonia", Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States.[np]. Jun: Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States, 2011.
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Controlling relative growth rates of different exposed crystallographic facets of a group-iii nitride crystal during the ammonothermal growth of a group-iii nitride crystal, 2011.
Kamber, D. S., S. Pimputkar, M. Saito, S. P. DenBaars, J. S. Speck, and S. Nakamura, Group-iii nitride monocrystal with improved purity and method of producing the same, 2011.

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