Abstract

We fabricated 2-stack white organic light-emitting diode (WOLED) structure with luminance efficiency of 27.4 cd/A and color point of (0.32, 0.29) where one unit device emitted blue color and the other emitted red and green colors. Comparing with other configurations possible for 2-stack WOLED, it was found that our structure had merits of higher color gamut and lower power consumption, in spite of low luminance efficiency. In our 2-stack structure, we found that the blue efficiency which determines the power consumption of panel was strongly dependent on the position of the blue emitting layer. Based on an optical simulation and a viewing-angle analysis, we proved that the change of the luminance of blue color came from the microcavity effect depending on the distances between anode and cathode and between blue emitting layer and cathode.

© 2009 IEEE

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  1. C. Chu, J. Ha, J. Choi, S. Lee, J. Rhee, D. Lee, J. Chung, H. Kim, K. Chung, "Advences and issues in white OLED and color filter architecture," Proc. Int. Meeting on Inf. Display (2007) pp. 1118-1121.
  2. J. W. Hamer, A. D. Arnold, M. L. Boroson, M. Itoh, T. K. Hatwar, M. J. Helber, K. Miwa, C. I. Levey, M. E. Long, J. E. Ludwicki, D. C. Scheier, J. P. Spindler, S. A. Van Slyke, "System design for a high color-gamut TV-sized AMOLED display," J. SID 16, 3 (2008).
  3. T. Urabe, T. Sasaoka, K. Tatsuki, J. Takaki, "Technological evolution for large screen size active matrix OLED display," Proc. Int. Meeting on Inf. Display (2007) pp. 161.
  4. J. P. Spindler, T. K. Hatwar, "Development of tandem white architecture for large-sized AMOLED displays with wide color gamut," Proc. Int. Meeting on Inf. Display (2007) pp. 89.
  5. J. Birnstock, G. He, S. Murano, A. Werner, O. Zeika, "White stacked OLED with 35 lm/W and 100 000 hours lifetime at 1000 cd/m$^{2}$ for display and lighting applications," Proc. Int. Meeting on Inf. Display (2008) pp. 822.
  6. H. Kanno, N. C. Giebink, Y. Sun, S. R. Forrest, "Stacked white organic light-emitting devices based on a combination of fluorescent and phosphorescent emitters," Appl. Phys. Lett. 89, 023503 (2006).
  7. S. Lee, "Highly efficient and wide color gamut white OLED architecture for display application," Proc. Int. Meeting on Inf. Display (2008) pp. 826.
  8. L.-S. Liao, X. Ren, W. J. Begley, Y.-S. Tyan, C. A. Pellow, "Tandem white OLEDs combining fluorescent and phosphorescent emission," Proc. Int. Meeting on Inf. Display (2008) pp. 818.
  9. H. K. Kim, H. S. Choi, D. H. Yoo, W. C. Kim, J. G. Yoon, J. W. Yang, "Method to enhance color gamut up to 89% in bottom emission active-matrix organic light emitting device," Proc. Int. Meeting on Inf. Display (2007) pp. 43.

2008 (1)

J. W. Hamer, A. D. Arnold, M. L. Boroson, M. Itoh, T. K. Hatwar, M. J. Helber, K. Miwa, C. I. Levey, M. E. Long, J. E. Ludwicki, D. C. Scheier, J. P. Spindler, S. A. Van Slyke, "System design for a high color-gamut TV-sized AMOLED display," J. SID 16, 3 (2008).

2006 (1)

H. Kanno, N. C. Giebink, Y. Sun, S. R. Forrest, "Stacked white organic light-emitting devices based on a combination of fluorescent and phosphorescent emitters," Appl. Phys. Lett. 89, 023503 (2006).

Appl. Phys. Lett. (1)

H. Kanno, N. C. Giebink, Y. Sun, S. R. Forrest, "Stacked white organic light-emitting devices based on a combination of fluorescent and phosphorescent emitters," Appl. Phys. Lett. 89, 023503 (2006).

J. SID (1)

J. W. Hamer, A. D. Arnold, M. L. Boroson, M. Itoh, T. K. Hatwar, M. J. Helber, K. Miwa, C. I. Levey, M. E. Long, J. E. Ludwicki, D. C. Scheier, J. P. Spindler, S. A. Van Slyke, "System design for a high color-gamut TV-sized AMOLED display," J. SID 16, 3 (2008).

Other (7)

T. Urabe, T. Sasaoka, K. Tatsuki, J. Takaki, "Technological evolution for large screen size active matrix OLED display," Proc. Int. Meeting on Inf. Display (2007) pp. 161.

J. P. Spindler, T. K. Hatwar, "Development of tandem white architecture for large-sized AMOLED displays with wide color gamut," Proc. Int. Meeting on Inf. Display (2007) pp. 89.

J. Birnstock, G. He, S. Murano, A. Werner, O. Zeika, "White stacked OLED with 35 lm/W and 100 000 hours lifetime at 1000 cd/m$^{2}$ for display and lighting applications," Proc. Int. Meeting on Inf. Display (2008) pp. 822.

S. Lee, "Highly efficient and wide color gamut white OLED architecture for display application," Proc. Int. Meeting on Inf. Display (2008) pp. 826.

L.-S. Liao, X. Ren, W. J. Begley, Y.-S. Tyan, C. A. Pellow, "Tandem white OLEDs combining fluorescent and phosphorescent emission," Proc. Int. Meeting on Inf. Display (2008) pp. 818.

H. K. Kim, H. S. Choi, D. H. Yoo, W. C. Kim, J. G. Yoon, J. W. Yang, "Method to enhance color gamut up to 89% in bottom emission active-matrix organic light emitting device," Proc. Int. Meeting on Inf. Display (2007) pp. 43.

C. Chu, J. Ha, J. Choi, S. Lee, J. Rhee, D. Lee, J. Chung, H. Kim, K. Chung, "Advences and issues in white OLED and color filter architecture," Proc. Int. Meeting on Inf. Display (2007) pp. 1118-1121.

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