Abstract

White-light-emitting diodes (WLEDs) were fabricated by combining a yellow Sr3SiO5:Ce3+,Li+ phosphor with a blue light-emitting diode (LED) (460nm chip) or a near ultraviolet (n-UV) LED (405nm chip), respectively. Color temperature (Tc) of Sr3SiO5:Ce3+,Li+-based WLEDs could be tuned from 6500 to 100,000K (blue LED pumping) and from 4900 to 50,000K (n-UV LED pumping) without mixing with other phosphors. The blue LED-pumped WLED showed excellent white light (luminous efficiency=31.7lmW, Tc=6857K) at 20mA. This WLED showed a stable color coordinates property against an increase of the forward current. An n-UV LED-pumped WLED also showed bright white light (25.0lmW, 5784K) at 20mA.

© 2007 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |

  1. S. Nakamura, T. Mukai, and M. Senoh, Appl. Phys. Lett. 64, 1687 (1994).
    [CrossRef]
  2. J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, Appl. Phys. Lett. 84, 1647 (2004).
    [CrossRef]
  3. H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, J. Lumin. 126, 371 (2007).
    [CrossRef]
  4. M. G. Craford, Proc. SPIE 4776, 1 (2002).
    [CrossRef]
  5. J. K. Sheu, S. J. Chang, C. H. Kuo, Y. K. Su, L. W. Wu, Y. C. Lin, W. C. Lai, J. M. Tsai, G. C. Chi, and R. K. Wu, IEEE Photon. Technol. Lett. 15, 18 (2003).
    [CrossRef]
  6. H. Wu, X. Zhang, C. Guo, J. Xu, M. Wu, and Q. Su, IEEE Photon. Technol. Lett. 17, 1160 (2005).
    [CrossRef]
  7. Y.-H. Won, H. S. Jang, W. B. Im, J. S. Lee, and D. Y. Jeon, Appl. Phys. Lett. 89, 231909 (2006).
    [CrossRef]
  8. J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, Appl. Phys. Lett. 82, 683 (2003).
    [CrossRef]
  9. K. Sakuma, K. Omichi, N. Kimura, M. Ohashi, D. Tanaka, N. Hirosaki, Y. Yamamoto, R.-J. Xie, and T. Suehiro, Opt. Lett. 29, 2001 (2004).
    [CrossRef] [PubMed]
  10. R.-J. Xie, N. Hirosaki, M. Mitomo, K. Takahashi, and K. Sakuma, Appl. Phys. Lett. 88, 101104 (2006).
    [CrossRef]
  11. R.-J. Xie, N. Hirosaki, M. Mitomo, K. Sakuma, and N. Kimura, Appl. Phys. Lett. 89, 241103 (2006).
    [CrossRef]
  12. H. S. Jang and D. Y. Jeon, Appl. Phys. Lett. 90, 041906 (2007).
    [CrossRef]
  13. T. Y. Tien, E. F. Gibbons, R. G. Delosh, P. J. Zacmanidis, D. E. Smith, and H. L. Stadler, J. Electrochem. Soc. 120, 278 (1973).
    [CrossRef]
  14. A. A. Setlur and A. M. Srivastava, Opt. Mater. 29, 1647 (2007).
    [CrossRef]
  15. H.-S. Chen, C.-K. Hsu, and H.-Y. Hong, IEEE Photon. Technol. Lett. 18, 193 (2006).
    [CrossRef]
  16. J. S. Kim, P. E. Jeon, J. C. Choi, H. L. Park, S. I. Mho, and G. C. Kim, Appl. Phys. Lett. 84, 2931 (2004).
    [CrossRef]

2007 (3)

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, J. Lumin. 126, 371 (2007).
[CrossRef]

H. S. Jang and D. Y. Jeon, Appl. Phys. Lett. 90, 041906 (2007).
[CrossRef]

A. A. Setlur and A. M. Srivastava, Opt. Mater. 29, 1647 (2007).
[CrossRef]

2006 (4)

H.-S. Chen, C.-K. Hsu, and H.-Y. Hong, IEEE Photon. Technol. Lett. 18, 193 (2006).
[CrossRef]

R.-J. Xie, N. Hirosaki, M. Mitomo, K. Takahashi, and K. Sakuma, Appl. Phys. Lett. 88, 101104 (2006).
[CrossRef]

R.-J. Xie, N. Hirosaki, M. Mitomo, K. Sakuma, and N. Kimura, Appl. Phys. Lett. 89, 241103 (2006).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, J. S. Lee, and D. Y. Jeon, Appl. Phys. Lett. 89, 231909 (2006).
[CrossRef]

2005 (1)

H. Wu, X. Zhang, C. Guo, J. Xu, M. Wu, and Q. Su, IEEE Photon. Technol. Lett. 17, 1160 (2005).
[CrossRef]

2004 (3)

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, Appl. Phys. Lett. 84, 1647 (2004).
[CrossRef]

J. S. Kim, P. E. Jeon, J. C. Choi, H. L. Park, S. I. Mho, and G. C. Kim, Appl. Phys. Lett. 84, 2931 (2004).
[CrossRef]

K. Sakuma, K. Omichi, N. Kimura, M. Ohashi, D. Tanaka, N. Hirosaki, Y. Yamamoto, R.-J. Xie, and T. Suehiro, Opt. Lett. 29, 2001 (2004).
[CrossRef] [PubMed]

2003 (2)

J. K. Sheu, S. J. Chang, C. H. Kuo, Y. K. Su, L. W. Wu, Y. C. Lin, W. C. Lai, J. M. Tsai, G. C. Chi, and R. K. Wu, IEEE Photon. Technol. Lett. 15, 18 (2003).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, Appl. Phys. Lett. 82, 683 (2003).
[CrossRef]

2002 (1)

M. G. Craford, Proc. SPIE 4776, 1 (2002).
[CrossRef]

1994 (1)

S. Nakamura, T. Mukai, and M. Senoh, Appl. Phys. Lett. 64, 1687 (1994).
[CrossRef]

1973 (1)

T. Y. Tien, E. F. Gibbons, R. G. Delosh, P. J. Zacmanidis, D. E. Smith, and H. L. Stadler, J. Electrochem. Soc. 120, 278 (1973).
[CrossRef]

Appl. Phys. Lett. (8)

S. Nakamura, T. Mukai, and M. Senoh, Appl. Phys. Lett. 64, 1687 (1994).
[CrossRef]

J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, Appl. Phys. Lett. 84, 1647 (2004).
[CrossRef]

Y.-H. Won, H. S. Jang, W. B. Im, J. S. Lee, and D. Y. Jeon, Appl. Phys. Lett. 89, 231909 (2006).
[CrossRef]

J. K. Park, M. A. Lim, C. H. Kim, H. D. Park, J. T. Park, and S. Y. Choi, Appl. Phys. Lett. 82, 683 (2003).
[CrossRef]

R.-J. Xie, N. Hirosaki, M. Mitomo, K. Takahashi, and K. Sakuma, Appl. Phys. Lett. 88, 101104 (2006).
[CrossRef]

R.-J. Xie, N. Hirosaki, M. Mitomo, K. Sakuma, and N. Kimura, Appl. Phys. Lett. 89, 241103 (2006).
[CrossRef]

H. S. Jang and D. Y. Jeon, Appl. Phys. Lett. 90, 041906 (2007).
[CrossRef]

J. S. Kim, P. E. Jeon, J. C. Choi, H. L. Park, S. I. Mho, and G. C. Kim, Appl. Phys. Lett. 84, 2931 (2004).
[CrossRef]

IEEE Photon. Technol. Lett. (3)

J. K. Sheu, S. J. Chang, C. H. Kuo, Y. K. Su, L. W. Wu, Y. C. Lin, W. C. Lai, J. M. Tsai, G. C. Chi, and R. K. Wu, IEEE Photon. Technol. Lett. 15, 18 (2003).
[CrossRef]

H. Wu, X. Zhang, C. Guo, J. Xu, M. Wu, and Q. Su, IEEE Photon. Technol. Lett. 17, 1160 (2005).
[CrossRef]

H.-S. Chen, C.-K. Hsu, and H.-Y. Hong, IEEE Photon. Technol. Lett. 18, 193 (2006).
[CrossRef]

J. Electrochem. Soc. (1)

T. Y. Tien, E. F. Gibbons, R. G. Delosh, P. J. Zacmanidis, D. E. Smith, and H. L. Stadler, J. Electrochem. Soc. 120, 278 (1973).
[CrossRef]

J. Lumin. (1)

H. S. Jang, W. B. Im, D. C. Lee, D. Y. Jeon, and S. S. Kim, J. Lumin. 126, 371 (2007).
[CrossRef]

Opt. Lett. (1)

Opt. Mater. (1)

A. A. Setlur and A. M. Srivastava, Opt. Mater. 29, 1647 (2007).
[CrossRef]

Proc. SPIE (1)

M. G. Craford, Proc. SPIE 4776, 1 (2002).
[CrossRef]

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (4)

Fig. 1
Fig. 1

(a) Normalized PL spectra and (b) CIE color coordinates of Sr 3 SiO 5 : Ce 3 + , Li + phosphor samples with varying Ce 3 + concentration under excitation of 460 nm radiation.

Fig. 2
Fig. 2

CIE color coordinates of (a) blue LED-pumped pc LEDs using Sr 3 SiO 5 : Ce 3 + , Li + and (b) n-UV LED-pumped pc LEDs using Sr 3 SiO 5 : Ce 3 + , Li + (D65, standard illuminant whose correlated color temperature is 6500 K ).

Fig. 3
Fig. 3

(a) EL spectra and (b) CIE color coordinates of blue LED-pumped WLED using Sr 2.85 SiO 5 : 0.075 Ce 3 + , 0.075 Li + under various currents (dc 10– 70 mA ) (D65, standard illuminant whose correlated color temperature is 6500 K ).

Fig. 4
Fig. 4

(a) EL spectra and (b) magnified second PL bands of n-UV LED-pumped WLED using Sr 2.85 SiO 5 : 0.075 Ce 3 + , 0.075 Li + under various currents (dc 10– 70 mA ).

Metrics