Efficient and bright blue-emitting phosphorescent materials

Journal of the Society for Information Display

Volumn 13, Issue 10, 2005, Pages 857-862

  Yeh, Shi Jay ^a   Chen, Chin Ti ^a   Song, Yi Hwa ^b   Chi, Yun ^b   Ho, Meng Huan ^c  

^a INSTITUTE OF CHEMISTRY   (Taiwan)

^b NATIONAL TSING HUA UNIVERSITY   (Taiwan)

^c NATIONAL CHIAO TUNG UNIVERSITY   (Taiwan)

Author keywords

Blue; Hetroleptic iridium complex; OLED; Phosphorescence

Indexed keywords

BENZENE; IRIDIUM; LIGANDS; LIGHT EMISSION; LIGHT EMITTING DIODES; LUMINESCENCE; ORGANIC LIGHT EMITTING DIODES (OLED); PHOSPHORESCENCE;

ANCILLARY LIGANDS; BLUE; BLUE DOPANTS; CARBAZOLYL; EFFICIENT; ELECTROPHOSPHORESCENCE; HETEROLEPTIC; HETROLEPTIC IRIDIUM COMPLEX; IRIDIUM COMPLEXES; OLED; ORGANIC; PHOSPHORESCENT MATERIALS; SHIFTING; TRIFLUOROMETHYL;

IRIDIUM COMPOUNDS;

EID: 33947357485     PISSN: 10710922     EISSN: None     Source Type: Journal    
DOI: 10.1889/1.2121070     Document Type: Conference Paper

References (25)

1. (a) M A Baldo, S Lamansky, P E Burrows, M E Thompson, and S R Forrest, "Very high-efficiency green organic light-Emitting devices based on electrophosphorescence," Appl Phys Lett 75, 4 (1999).
2. (b) T Witanabe, K Nakamura, S Kawami, Y Fukuda, T Tsuji, T Wakimoto, S Miyaguchi, M Yahiro, M J Yang, and T Tsuji, "Optimization of emitting efficiency in organic LED cells using Ir complex," Synthetic Metals 122, 203 (2001).
3. (c) M Ikai, S Tokito, Y Sakamoto, T Suzuki, and Y Taga, "Highly efficient phosphorescence from organic light-emitting devices with an exciton-block layer," Appl Phys Lett 79, 156 (2001).
4. (a) C Adachi, M A Baldo, S R Forrest, S Lamansky, M E Thompson, and R C Kwong, "High-efficiency red electrophosphorescence devices," Appl Phys Lett 78, 1622 (2001).
5. (b) J P Duan, P P Sun, and C H Cheng, "New iridium complexes as highly efficient orange-red emitters in organic light-emitting diodes," Adv Mater 15, 224 (2002).
6. (c) Y J Su, H L Huang, C L Le, C H Chien, Y T Tao, P T Chou, S Datta, and R S Liu, "Highly efficient red electrophosphorescent devices based on iridium isoquinoline complexes: remarkable external quantum efficiency over a wide range of current," Adv Mater 15, 884 (2002).
7. (d) A Tsuboyama, H Iwawki, M Furugori, T Mukaide, J Kamatani, S Igawa, T Moriyama, S Miura, T Takiguchi, S Okada, M Hoshino, and K Ueno, "Homoleptic cyclometalated iridium complexes with highly efficient red phosphorescence and application to organic light-emitting diode," J Am Chem Soc 125, 12971 (2003).
8. (a) C Adachi, R C Kwong, P Djurovich, V Adamovich, M A Baldo, M E Thompson, and S R Forrest, "Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materials," Appl Phys Lett 79, 2082 (2001).
9. (b) R J Holmes, S R Forrest, Y J Tung, R C Kwong, J J Brown, S Garon, and M E Thompson, "Blue organic electrophosphorescence using exothermic host-guest energy transfer," Appl Phys Lett 82, 2422 (2003).
10. (c) S Tokito, T Iijima, Y Suzuri, H Kita, T Tsuzuki, and T F Sato, "Confinement of triplet energy on phosphorescent molecules for high-efficient organic blue-light-emitting devices," Appl Phys Lett 83, 569 (2003).
11. (a) A B Tamayo, B D Alleyne, P I Djurovich, S Lamansky, I Tsyba, N N Ho, R Bau, and M E Thompson, "Synthesis and characterization of facial and meridional tris-cyclmetalated iridium(III) complexes," J Am Chem Soc 125, 7377 (2003).
12. 3 for organic light-emitting devices," Bull Chem Soc Jpn 77, 751 (2004).
13. Md K Nazeeruddin, R Humphry-Baker, D Berner, S Rivier, L Zuppiroli, and M Graetzel, "Highly phosphorescence iridium complexes and their application in organic light-emitting devices," J Am Chem Soc 125, 8790 (2003).
14. (a) R J Holmes, B W D'Andrade, S R Forrest, X Ren, J Li, and M E Thompson, "Efficient, deep-blue organic electrophosphorescence by guest charge trapping," Appl Phys Lett 83, 38.1.8 (2003).
15. (b) X Ren, J Li, R J Holmes, P I Djurovich, S R Forrest, and M E Thompson, "Ultrhigh energy gap hosts in deep blue organic electrophosphorescent devices," Chem Mater 16, 4743 (2004).
16. C L Lee, R R Das, and J J Kim, "Polymer-based blue electrophosphorescent light-emitting diodes using a bisorthometalated Ir(III) complex as the triplet emitter," Chem Mater 16, 4624 (2004).
17. P Coppo, E A Plummer, and L De Cola, "Tuning iridium(III) phenylpyridine complexes in the "almost blue" region," Chem Commun 1774 (2004).
18. M Nonoyama, "Benzo[h]quinolin-10-yl-N iridium(III) complexes," Bull Chem Soc Jpn 47, 767 (1974).
19. J M McManus and R M Herbst, "Tetrazole analogs of pyridinecarboxylic acids," J Org Chem 24, 1462 (1959).
20. (a) S Kubota, M Uda, andT Nakagawa, "1,2,4-Triazoles. V(1). Nuclear magnetic resonances study of N-methyl derivatives of 1,2,4-triazoles," J Heterocyclic Chem, 12, 855 (1975).
21. (b) K Funabiki, N Noma, G Kuzuya, M Matsui, and K Shibata, "A direct and general synthesis of 5-substituted 3-trifluoromethyl-1,2,4-triazoles via the three component condensation reaction of ethyl trifluoroacetate hydrazine and amidines," J Chem Research (M), 1301 (1999).
22. L H Chan, R H Lee, C F Hsieh, H C Yeh, and C T Chen, "Optimization of high-performance blue organic light-emitting diodes containing tetraphenylsilane molecular glass materials," J Am Chem Soc 124, 6469 (2002).
23. S R Forrest, DDC Bradley, and M E Thompson, "Measuring the efficiency of organic light-emitting devices," Adv Mater 15, 1043 (2003).
24. G Wyszecki, W S Stiles, Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd ed. (Wiley, New York, 1982), p. 259.
25. V Adamovich, S R Cordero, PI Djurovich, A Tamayo, M E Thompson, B W D'Andrade, and S R Forrest, "New charge-carrier blocking materials for high efficiency OLEDs," Org Electr 4, 77 (2003).