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Transparent Ag-Free OLED Fabricated by OVPD Using Thin Au Contacts

  • P. Pfeiffer (a1), D. Stümmler (a1), S. Loginkin (a1), M. Heuken (a1) (a2), A. Vescan (a1) and H. Kalisch (a1)...

Abstract

We demonstrate Ag-free transparent OLED (TOLED) fabricated by organic vapor phase deposition (OVPD) using thin Au contacts. Three types of TOLED devices have been studied. The first one has been deposited on ITO substrates to compare thin Ag and Au films as top cathodes. A 6-fold increase in operational lifetime (LT50, 4 mA/cm2) from 27 h to 172 h can be observed when replacing Ag by Au while maintaining similar electro-optical characteristics. Furthermore, a second type of TOLED on thin Au films, replacing ITO and suppressing laterally guided modes [1], has been studied. TOLED on ITO substrates and on thin Au films exhibit very low onset voltages of 2.2 V. Both types show about 30% transparency in the VIS light region and emit orange light with a peak wavelength of 608 nm from either side with a total EQE of about 9% (measured at 1000 cd/m2 in sum). The third type of TOLED was fabricated with an inverted structure, with the aim to further increase operational lifetime by burying the reactive LiF/Al electron injection layer (EIL). This will make the EIL less accessible for oxygen and moisture. Our results show difficulties in electron injection when depositing the organic stack on Al/LiF, which may be attributed to an insufficient thermal activation of the EIL.

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1. Slawinski, M., Brast, M., Zhang, X. D., Merget, F., Witzens, J., Heuken, M., Vescan, A. and Kalisch, H., MRS Proceedings 1627 (2014).
2. Gustafsson, G., Cao, Y., Treacy, G. M., Klavetter, F., Colaneri, N. and Heeger, A. J., Letters to Nature 357 (1992)
3. Wu, C. C., Theiss, S. D., Gu, G., Lu, M. H., Sturm, J. C., Wagner, S. and Forrest, S. R., Electron Device Letters IEEE 18, 609612 (1997)
4. Uchida, T., Shibasaki, M., Matsuzaki, T. and Nagata, Y., Applied Physics Express 6, 041604 (2013)
5. Gu, G., Bulovíc, V., Burrows, P. E., Forrest, S. R. and Thompson, M. E., Applied Physics Letters 68, 2606 (1996)
6. Gu, G., Parthasarathy, G. and Forrest, S. R., Applied Physics Letters 74, 305 (1999)
7. Song, W., So, S. K., Moulder, J., Qiu, Y., Zhu, Y. and Cao, L., Surface and Interface Analysis 32, 7073 (2001)
8. Wang, X. Z., Xie, Z. T., Wang, X. J., Zhou, Y. C., Zhang, W. H., Ding, X. M. and Hou, X. Y., Applied Surface Science 253, 39303932 (2007)
9. Yook, K. S., Jeon, S. O., Joo, C. W. and Lee, J. Y., Applied Physics Letters 93, 013301 (2008)
10. Vaufrey, D., Khalifa, M. B., Besland, M.-P., Tardy, J., Sandu, C., Blanchin, M.-G. and Roger, J.-A., Materials Science and Engineering C 21, 265271 (2002)
11. Dobbertin, T., Werner, O., Meyer, J., Kammoun, A., Schneider, D., Riedl, T., Becker, E., Johannes, H.-H. and Kowalsky, W., Applied Physics Letters 83, 5071 (2003)
12. Parthasarathy, G., Burrows, P. E., Khalfin, V., Kozlov, V. G. and Forrest, S. R., Applied Physics Letters 72, 2138 (1998)
13. Lindla, F., Boesing, M., Zimmermann, C., Jessen, F., van Gemmern, P., Bertram, D., Keiper, D., Meyer, N., Heuken, M., Kalisch, H. and Jansen, R.H., Applied Physics Letters 95, 213305 (2009)
14. Mason, M. G., Tang, C. W., Hung, L.-S., Raychaudhuri, P., Madathil, J., Giesen, D. J., Yan, L., Le, Q. T., Gao, Y., Lee, S.-T., Liao, L. S., Cheng, L. F., Salaneck, W. R., dos Santos, D. A. and Brédas, J.L., Journal of Applied Physics 89, 2756 (2001)
15. Kim, Y. S., Park, J. H., Choi, D. H., Jang, H. S., Lee, J. H., Park, H. J., Choi, J. I., Ju, D. H., Lee, J. Y. and Kim, D., Applied Surface Science 254, 15241527 (2007)
16. Fahland, M., in: Brabec, C., Dyakonov, V., Scherfeds, U. (Eds.), Organic Photovoltaics, Wiley-VCH, Weinheim, 2008

Keywords

Transparent Ag-Free OLED Fabricated by OVPD Using Thin Au Contacts

  • P. Pfeiffer (a1), D. Stümmler (a1), S. Loginkin (a1), M. Heuken (a1) (a2), A. Vescan (a1) and H. Kalisch (a1)...

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