Influence of the hole blocking layer on blue phosphorescent organic light-emitting devices using 3,6-di(9-carbazolyl)-9-(2-ethylhexyl)carbazole as host material

Applied Physics Letters

Volumn 96, Issue 9, 2010, Pages

  Seidler, Nico ^a   Reineke, Sebastian ^a   Walzer, Karsten ^a   Lüssem, Björn ^a   Tomkeviciene, Ausra ^b   Grazulevicius, Juozas V ^b   Leo, Karl ^a  

^a DRESDEN UNIVERSITY OF TECHNOLOGY   (Germany)

^b KAUNAS UNIVERSITY OF TECHNOLOGY   (Lithuania)

Author keywords

[No Author keywords available]

Indexed keywords

BLUE EMITTER; BLUE LIGHT EMISSIONS; BLUE LIGHT-EMITTING; CARBAZOLYL; DIFLUOROPHENYL; DISPLAY TECHNOLOGIES; HOLE BLOCKING LAYERS; HOST MATERIALS; HOST-GUEST SYSTEM; LUMINOUS EFFICACY; OPTIMIZED STRUCTURES; ORGANIC LIGHT-EMITTING DEVICES; WIDE GAP;

CURRENT DENSITY; DISPLAY DEVICES; IRIDIUM; IRIDIUM COMPOUNDS; LIGHT; LUMINESCENT DEVICES; PHOSPHORESCENCE; SOUND INSULATING MATERIALS;

LIGHT EMISSION;

EID: 77949399399     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3350890     Document Type: Article

References (18)

1. S. Reineke, F. Lindner, G. Schwartz, N. Seidler, K. Walzer, B. Lüssem, and K. Leo, Nature (London) NATUAS 0028-0836 459, 234 (2009). 10.1038/nature08003
2. N. Chopra, J. Lee, Y. Zheng, S. -H. Eom, J. Xue, and F. So, Appl. Phys. Lett. APPLAB 0003-6951 93, 143307 (2008). 10.1063/1.3000382
3. J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu, Appl. Phys. Lett. APPLAB 0003-6951 94, 193305 (2009). 10.1063/1.3136861
4. S. -J. Su, E. Gonmori, H. Sasabe, and J. Kido, Adv. Mater. (Weinheim, Ger.) ADVMEW 0935-9648 20, 4189 (2008). 10.1002/adma.200801375
5. C. Adachi, M. A. Baldo, M. E. Thompson, and S. R. Forrest, J. Appl. Phys. JAPIAU 0021-8979 90, 5048 (2001). 10.1063/1.1409582
6. Y. Kawamura, H. Sasabe, and C. Adachi, Jpn. J. Appl. Phys., Part 1 JAPNDE 0021-4922 43, 7729 (2004). 10.1143/JJAP.43.7729
7. M. -H. Tsai, Y. -H. Hong, C. -H. Chang, H. -C. Su, C. -C. Wu, A. Matoliukstyte, J. Simokaitiene, S. Grigalevicius, J. V. Grazulevicius, and C. -P.-Hsu, Adv. Mater. (Weinheim, Ger.) ADVMEW 0935-9648 19, 862 (2007). 10.1002/adma.200600822
8. K. Walzer, B. Maennig, M. Pfeiffer, and K. Leo, Chem. Rev. (Washington, D.C.) CHREAY 0009-2665 107, 1233 (2007). 10.1021/cr050156n
9. R. Meerheim, S. Scholz, S. Olthof, G. Schwartz, S. Reineke, K. Walzer, and K. Leo, J. Appl. Phys. JAPIAU 0021-8979 104, 014510 (2008). 10.1063/1.2951960
10. G. He, M. Pfeiffer, K. Leo, M. Hofmann, J. Birnstock, R. Pudzich, and J. Salbeck, Appl. Phys. Lett. APPLAB 0003-6951 85, 3911 (2004). 10.1063/1.1812378
11. K. Goushi, R. Kwong, J. J. Brown, H. Sasabe, and C. Adachi, J. Appl. Phys. JAPIAU 0021-8979 95, 7798 (2004). 10.1063/1.1751232
12. D. Tanaka, Y. Agata, T. Takeda, S. Watanabe, and J. Kido, Jpn. J. Appl. Phys., Part 2 JAPLD8 0021-4922 46, L117 (2007). 10.1143/JJAP.46.L117
13. L. Xiao, S. -J. Su, Y. Agata, H. Lan, and J. Kido, Adv. Mater. (Weinheim, Ger.) ADVMEW 0935-9648 21, 1271 (2009). 10.1002/adma.200802034
14. C. -H. Chang, Y. -J. Lu, C. -C. Liu, Y. -H. Yeh, and C. -C. Wu, J. Disp. Technol. IJDTAL 1551-319X 3, 193 (2007). 10.1109/JDT.2007.895354
15. The LUMO of TCz1 is derived from the ionization potential measured by cyclic voltammetry (5.8 eV) and the optical gap of ∼3.2 eV.
16. H. Sasabe, E. Gonmori, T. Chiba, Y. -J. Li, D. Tanaka, S. -J. Su, T. Takeda, Y. -J. Pu, K. Nakayama, and J. Kido, Chem. Mater. CMATEX 0897-4756 20, 5951 (2008). 10.1021/cm801727d
17. Alternatively, a 20 nm thick layer of MeO-TPD doped with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) can be used as hole injection layer since the electrical behavior is identical. NDP-2 was chosen due to its improved stability and processing.
18. S. Reineke, K. Walzer, and K. Leo, Phys. Rev. B PRBMDO 0163-1829 75, 125328 (2007). 10.1103/PhysRevB.75.125328