Novel host materials for blue phosphorescent OLEDs

Proceedings of SPIE - The International Society for Optical Engineering

Volumn 8829, Issue , 2013, Pages

  Strohriegl, Peter ^a   Wagner, Daniel ^a   Schrögel, Pamela ^a   Hoffmann, Sebastian T ^a   Köhler, Anna ^a   Heinemeyer, Ute ^b   Münster, Ingo ^b  

^a UNIVERSITY OF BAYREUTH   (Germany)

^b BASF SE   (Germany)

Author keywords

Bipolar; Blue OLED; Carbazole; Host material; Phosphorescence; Triazine

Indexed keywords

BIPOLAR; BLUE OLEDS; CARBAZOLE; HOST MATERIALS; TRIAZINE;

ELECTRONS; ELECTROPOLYMERIZATION; FUNCTIONAL GROUPS; GLASS; HOLE MOBILITY; ORGANIC POLYMERS; PHOSPHORESCENCE; POLYCYCLIC AROMATIC HYDROCARBONS; QUANTUM EFFICIENCY; SOUND INSULATING MATERIALS;

LIGHT EMISSION;

EID: 84888993068     PISSN: 0277786X     EISSN: 1996756X     Source Type: Conference Proceeding    
DOI: 10.1117/12.2023305     Document Type: Conference Paper

References (34)

1. Baldo, M. A., O'Brien, D. F., You, Y., Shoustikov, A., Sibley, S., Thompson, M. E. and Forrest, S. R., "Highly efficient phosphorescent emission from organic electroluminescent devices," Nature 395(6698), 151-154 (1998).
2. O'Brien, D. F., Baldo, M. A., Thompson, M. E. and Forrest, S. R., "Improved energy transfer in electrophosphorescent devices," Appl. Phys. Lett. 74(3), 442-444 (1999).
3. Adachi, C., Baldo, M. A., Thompson, M. E. and Forrest, S. R., "Nearly 100% internal phosphorescence efficiency in an organic light-emitting device," J. Appl. Phys. 90(10), 5048-5051 (2001).
4. Baldo, M. A., Adachi, C. and Forrest, S. R., "Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation," Phys. Rev. B 62(16), 10967-10977 (2000).
5. Matsushima, T. and Adachi, C., "Suppression of exciton annihilation at high current densities in organic lightemitting diode resulting from energy-level alignments of carrier transport layers," Appl. Phys. Lett. 92(6), 63306-3 (2008).
6. Chaskar, A., Chen, H.-F. and Wong, K.-T., "Bipolar Host Materials: A Chemical Approach for Highly Efficient Electrophosphorescent Devices," Adv. Mater. 23(34), 3876-3895 (2011).
7. Baldo, M. A., Lamansky, S., Burrows, P. E., Thompson, M. E. and Forrest, S. R., "Very high-efficiency green organic light-emitting devices based on electrophosphorescence," Appl. Phys. Lett. 75(1), 4-6 (1999).
8. Tsai, M.-H., Lin, H.-W., Su, H.-C., Ke, T.-H., Wu, C.-c., Fang, F.-C., Liao, Y.-L., Wong, K.-T. and Wu, C.-I., "Highly Efficient Organic Blue Electrophosphorescent Devices Based on 3,6-Bis(triphenylsilyl)carbazole as the Host Material," Adv. Mater. 18(9), 1216-1220 (2006).
9. Tsai, M.-H., Hong, Y.-H., Chang, C.-H., Su, H.-C., Wu, C.-c., Matoliukstyte, A., Simokaitiene, J., Grigalevicius, S., Grazulevicius, J. V. and Hsu, C.-P., "3-(9-Carbazolyl)carbazoles and 3,6-Di(9-carbazolyl)carbazoles as Effective Host Materials for Efficient Blue Organic Electrophosphorescence, " Adv. Mater. 19(6), 862-866 (2007).
10. He, J., Liu, H., Dai, Y., Ou, X., Wang, J., Tao, S., Zhang, X., Wang, P. and Ma, D., "Nonconjugated Carbazoles: A Series of Novel Host Materials for Highly Efficient Blue Electrophosphorescent OLEDs," J. Phys. Chem. C 113(16), 6761-6767 (2009).
11. Rothmann, M. M., Haneder, S., Da Como, E., Lennartz, C., Schildknecht, C. and Strohriegl, P., "Donor-Substituted 1,3,5-Triazines as Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes," Chem. Mater. 22(7), 2403-2410 (2010).
12. Inomata, H., Goushi, K., Masuko, T., Konno, T., Imai, T., Sasabe, H., Brown, J. J. and Adachi, C., "High-Efficiency Organic Electrophosphorescent Diodes Using 1,3,5-Triazine Electron Transport Materials," Chem. Mater. 16(7), 1285-1291 (2004).
13. Klenkler, R. A., Aziz, H., Tran, A., Popovic, Z. D. and Xu, G., "High electron mobility triazine for lower driving voltage and higher efficiency organic light emitting devices," Organic Electronics 9(3), 285-290 (2008).
14. An, Z.-F., Chen, R.-F., Yin, J., Xie, G.-H., Shi, H.-F., Tsuboi, T. and Huang, W., "Conjugated Asymmetric Donor-Substituted 1,3,5-Triazines: New Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes," Chem. Eur. J. 17(39), 10871-10878 (2011).
15. Liu, X.-K., Zheng, C.-J., Xiao, J., Ye, J., Liu, C.-L., Wang, S.-D., Zhao, W.-M. and Zhang, X.-H., "Novel bipolar host materials based on 1,3,5-triazine derivatives for highly efficient phosphorescent OLEDs with extremely low efficiency roll-off," Phys. Chem. Chem. Phys. 14(41), 14255-14261 (2012).
16. Rothmann, M. M., Fuchs, E., Schildknecht, C., Langer, N., Lennartz, C., Münster, I. and Strohriegl, P., "Designing a bipolar host material for blue phosphorescent OLEDs: Phenoxy-carbazole substituted triazine," Org. Electron. 12(7), 1192-1197 (2011).
17. Wang, Q., Wallace, J. U., Lee, T. Y.-H., Ou, J. J., Tsai, Y.-T., Huang, Y.-H., Wu, C.-C., Rothberg, L. J. and Chen, S. H., "Evaluation of propylene-, meta-, and para-linked triazine and tert-butyltriphenylamine as bipolar hosts for phosphorescent organic light-emitting diodes," J. Mater. Chem. C 1(11), 2224-2232 (2013).
18. Adachi, C., Kwong, R. C., Djurovich, P., Adamovich, V., Baldo, M. A., Thompson, M. E. and Forrest, S. R., "Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materials," Appl. Phys. Lett. 79(13), 2082-2084 (2001).
19. Gong, S., He, X., Chen, Y., Jiang, Z., Zhong, C., Ma, D., Qin, J. and Yang, C., "Simple CBP isomers with high triplet energies for highly efficient blue electrophosphorescence," J. Mater. Chem 22(7), 2894-2899 (2012).
20. Adamovich, V., Brooks, J., Tamayo, A., Alexander, A. M., Djurovich, P. I., D'Andrade, B. W., Adachi, C., Forrest, S. R. and Thompson, M. E., "High efficiency single dopant white electrophosphorescent light emitting diodes," New J. Chem. 26(9), 1171-1178 (2002).
21. Holmes, R. J., Forrest, S. R., Tung, Y.-J., Kwong, R. C., Brown, J. J., Garon, S. and Thompson, M. E., "Blue organic electrophosphorescence using exothermic host-guest energy transfer," Appl. Phys. Lett. 82(15), 2422-2424 (2003).
22. Tokito, S., Iijima, T., Suzuri, Y., Kita, H., Tsuzuki, T. and Sato, F., "Confinement of triplet energy on phosphorescent molecules for highly-efficient organic blue-light-emitting devices," Appl. Phys. Lett. 83(3), 569-571 (2003).
23. Tanaka, I., Tabata, Y. and Tokito, S., "Energy-transfer and light-emission mechanism of blue phosphorescent molecules in guest-host systems," Chem. Phys. Lett. 400(1-3), 86-89 (2004).
24. Schrögel, P., Tomkeviciene, A., Strohriegl, P., Hoffmann, S. T., Köhler, A. and Lennartz, C., "A series of CBPderivatives as host materials for blue phosphorescent organic light-emitting diodes," J. Mater. Chem 21(7), 2266-2273 (2011).
25. Schrögel, P., Langer, N., Schildknecht, C., Wagenblast, G., Lennartz, C. and Strohriegl, P., "Meta-linked CBPderivatives as host materials for a blue iridium carbene complex," Org. Electron. 12(12), 2047-2055 (2011).
26. Strohriegl, P. and Grazulevicius, J., "Charge-Transporting Molecular Glasses," Adv. Mater. 14(20), 1439-1452 (2002).
27. Shirota, Y., "Organic materials for electronic and optoelectronic devices," J. Mater. Chem 10(1), 1-25 (2000).
28. Schmechel, R. and Seggern, H. von, "Electronic traps in organic transport layers," Phys. Status Solidi A 201(6), 1215-1235 (2004).
29. Holmes, R. J., D'Andrade, B. W., Forrest, S. R., Ren, X., Li, J. and Thompson, M. E., "Efficient, deep-blue organic electrophosphorescence by guest charge trapping," Applied Physics Letters 83(18), 3818-3820 (2003).
30. Sasabe, H., Takamatsu, J.-i., Motoyama, T., Watanabe, S., Wagenblast, G., Langer, N., Molt, O., Fuchs, E., Lennartz, C. and Kido, J., "High-Efficiency Blue and White Organic Light-Emitting Devices Incorporating a Blue Iridium Carbene Complex," Adv. Mater. 22(44), 5003-5007 (2010).
31. Cowley, D. J. and Pasha, I., "The fluorescence of some dipolar NN-dialkyl-4-(dichloro-1,3,5-triazinyl)anilines. Part 3. Intersystem crossing yields from intramolecular charge-transfer excited states and triplet state properties," J. Chem. Soc., Perkin Trans. 2 1139-1145 (1983).
32. Wagner, D., Hoffmann, S. T., Heinemeyer, U., Münster, I., Köhler, A. and Strohriegl, P., submitted.
33. Köhler, A., Wilson, J. S., Friend, R. H., Al-Suti, M. K., Khan, M. S., Gerhard, A. and Bässler, H., "The singlettriplet energy gap in organic and Pt-containing phenylene ethynylene polymers and monomers," J. Chem. Phys. 116(21), 9457-9463 (2002).
34. Hoffmann, S. T., Schrögel, P., Rothmann, M., Albuquerque, R. Q., Strohriegl, P. and Köhler, A., "Triplet Excimer Emission in a Series of 4,4′-Bis(N-carbazolyl)-2,2′-biphenyl Derivatives," J. Phys. Chem. B 115(3), 414-421 (2010).