Hostname: page-component-7b9c58cd5d-wdhn8 Total loading time: 0 Render date: 2025-03-15T03:39:32.212Z Has data issue: false hasContentIssue false
  • English
  • Français

Current Status of GaN-Based Solid-State Lighting

Published online by Cambridge University Press:  31 January 2011

Shuji Nakamura
Get access

Abstract

The continuous improvement in luminous efficacy of “white” light-emitting-diode (LED) sources offers the potential of considerable energy savings in general lighting applications. Recent experiments at UCSB have demonstrated 117 lumens per watt (lm/W) in white LEDs, with further improvements expected in the near future. Considerable progress has also been achieved using nonpolar GaN, such as a-plane {1120} and m-plane {1100} GaN, or semipolar GaN substrates. Such devices avoid the deleterious effects of charge separation due to spontaneous and piezoelectric polarization inherent in most c-axis-oriented devices.

Type
Research Article
Information
MRS Bulletin , Volume 34 , Issue 2: Exploiting New Opportunities in Materials Research by Remembering and Applying Old Lessons , February 2009 , pp. 101 - 107
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Feezell, D.F., Schmidt, M.C., Farrell, R.M., Kim, K.-C., Saito, M., Fujito, K., Cohen, D. A., Speck, J.S., DenBaars, S.P., Nakamura, S., Jpn. J. Appl. Phys. 46, L284 (2007).Google Scholar
2Tyagi, A., Lin, Y.-D., Cohen, D.A., Saito, M., Fujito, K., Speck, J.S., DenBaars, S.P., Nakamura, S., Appl. Phys. Express 1, 091103 (2008).CrossRefGoogle Scholar
3Tyagi, A., Zhong, H., Chung, R.B., Feezell, D.F., Saito, M., Fujito, K., Speck, J.S., DenBaars, S.P., Nakamura, S., Phys. Status Solidi C 5, 2108 (2008).Google Scholar
4Sato, H., Chung, R.B., Hirasawa, H., Fellows, N., Masui, H., Wu, F., Saito, M., Fujito, K., Speck, J.S., DenBaars, S.P., Nakamura, S., Appl. Phys. Lett. 92, 221110 (2008).CrossRefGoogle Scholar
5 Optoelectronics Industry Development Association, “The Promise of Solid State Lighting” OIDA Report, 2001, http://www.netl.doe.gov/ssl/PDFs/oida_led-oled_rpt.pdf.Google Scholar
6Little, A.D., “Energy Savings Potential of Solid State Lighting in General Illumination Applications,” Report for the U.S. Department of Energy, http://www.netl.doe.gov/ssl/PDFs/SSL%20Energy%20Savings%20Potential%20Report%202006%20final4.pdf.Google Scholar
7Fujii, T., David, A., Gao, Y., Iza, M., DenBaars, S.P., Hu, E.L., Weisbuch, C., Nakamura, S., Phys. Status Solidi C 2, 2836 (2005).Google Scholar
8Schmidt, M.C., Kim, K.-C., Sato, H., Fellows, N., Masui, H., Nakamura, S., Denbaars, S.P., Speck, J.S., Jpn. J. Appl. Phys. 46, L126 (2007).Google Scholar
9Steigerwald, D.A., Bhat, J.C., Collins, D., Fletcher, R.M., Holcomb, M.O., Ludowise, M.J., Martin, P.S., Rudaz, S.L., IEEE J. Sel. Top. Quantum Electron. 8, 310 (2002).Google Scholar
10Streubel, K., Linder, N., Wirth, R., Jaeger, A., IEEE J. Sel. Top. Quantum Electron. 8, 321 (2002).CrossRefGoogle Scholar
11Chakraborty, A., Haskell, B.A., Keller, S., Speck, J.S., DenBaars, S.P., Nakamura, S., Mishra, U.K., Appl. Phys. Lett. 85, 5143 (2004).CrossRefGoogle Scholar
12Chakraborty, A., Haskell, B.A., Keller, S., Speck, J.S., Denbaars, S.P., Nakamura, S., Mishra, U.K., Jpn. J. Appl. Phys. 44, L173 (2005).CrossRefGoogle Scholar
13Schmidt, M.C., Kim, K.-C., Farrell, R.M., Feezell, D.F., Cohen, D.A., Saito, M., Fujito, K., Speck, J.S., DenBaars, S.P., Nakamura, S., Jpn. J. Appl. Phys. 46, L190 (2007).Google Scholar