Highly Efficient Blue LECs Using Charged Iridium Complexes

• Authors: K. Wongkhan , U. Mahanitipong , M. Srikaew , Y. Tantirunggrotchai , S. Sahasithiwat , R. Jitchati
• Languages of publication: EN

Abstracts

EN

Two heteroleptic charged iridium (III) species comprising two cyclometallating ligands and a neutral diimine ligand were synthesized and characterized, namely [(3,4,7,8-tetramethyl-1,10-phenanthroline-N-N')-bis-(2-(2,4-difluorophenyl)-5-(trifluoromethyl)pyridine-C^{6'},N)-iridium (III)]hexafluorophosphate (UM01) and [(3,4,7,8-tetramethyl-1,10-phenanthroline-N-N')-bis-(2-(2',4'-difluoro-phenyl)-1H-pyrazole-C^{6'},N)-iridium (III)]hexafluorophosphate (UM02). Both complexes were used as the blue emitter in OLED and LEC devices. We found that the optimized structure is ITO/PEDOT:PSS/complex:BMIMPF₆(1:1)/Al. The UM01 gave a current efficiency of 1.14 cd A^{-1}, whereas the UM02 shows a better CIE coordination at 0.19, 0.40.

Keywords

EN

85.60.Bt; 85.60.Jb

Discipline

• 85.60.Bt: Optoelectronic device characterization, design, and modeling
• 85.60.Jb: Light-emitting devices

• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 4
• Pages: 1109-1111

Dates

published

2015-04

Contributors

author

K. Wongkhan

• Department of Chemistry, Faculty of Science,Ubon Ratchathani University, Ubon Ratchathani Province, 34190, Thailand

author

U. Mahanitipong

• Department of Chemistry, Faculty of Science,Ubon Ratchathani University, Ubon Ratchathani Province, 34190, Thailand

author

M. Srikaew

• Department of Chemistry, Faculty of Science,Ubon Ratchathani University, Ubon Ratchathani Province, 34190, Thailand

author

Y. Tantirunggrotchai

• National Metal and Materials Technology Center, 114 Thailand Science Park, Pahol-yothin Rd., Klong 1, Khlong Luang, Pathumthani 12120, Thailand

author

S. Sahasithiwat

• Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani, 12120 Thailand

author

R. Jitchati

• Department of Chemistry, Faculty of Science,Ubon Ratchathani University, Ubon Ratchathani Province, 34190, Thailand

References

• [1] K.K.-W. Lo, S.P.-Y. Li, K.Y. Zhang, New J. Chem. 35, 265 (2011), doi: 10.1039/c0nj00478b
• [2] Q. Zhao, S.-J. Liu, W. Huang, Macromol. Rapid Commun. 31, 794 (2010), doi: 10.1002/marc.200900888
• [3] C. Ulbricht, B. Beyer, C. Friebe, A. Winter, U.S. Schubert, Adv. Mater. 21, 4418 (2009), doi: 10.1002/adma.200803537
• [4] J.A.G. Williams, A.J. Wilkinson, V.L. Whittle, Dalton Trans., 2081 (2008), doi: 10.1039/b716743a
• [5] M.S. Lowry, S. Bernhard, Chem. Eur. J. 12, 7970 (2006), doi: 10.1002/chem.200600618
• [6] W.-Y. Wong, C.-L. Ho, J. Mater. Chem. 19, 4457 (2009), doi: 10.1039/b819943d
• [7] C.D. Sunesh, G. Mathai, Y. Choe, Org. Electron. 15, 667 (2014), doi: 10.1016/j.orgel.2013.12.026
• [8] U. Mitschke, P. Baüerle, J. Mater. Chem. 10, 1471 (2000), doi: 10.1039/a908713c
• [9] H.J. Bolink, L. Cappelli, S. Cheylan, E. Coronado, R.D. Costa, N. Lardies, M.K. Nazeeruddin, E. Ortı, J. Mater. Chem. 17, 5032 (2007), doi: 10.1039/b713745a
• [10] M.K. Nazeeruddin, R.T. Wegh, Z. Zhou, C. Klein, Q. Wang, F. De Angelis, S. Fantacci, M. Grätzel, Inorg. Chem. 45, 9245 (2006), doi: 10.1021/ic060495e
• [11] L. He, L. Duan, J. Qiao, G. Dong, L. Wang, Y. Qiu, Chem. Mater. 22, 3535 (2010), doi: 10.1021/cm100993j
• [12] C. Rothe, C.-J. Chiang, V. Jankus, K. Abdullah, X. Zeng, R. Jitchati, A.S. Batsanov, M.R. Bryce, A.P. Monkman, Adv. Funct. Mater. 19, 2038 (2009), doi: 10.1002/adfm.200801767
• [13] F. De Angelis, S. Fantacci, N. Evans, C. Klein, S.M. Zakeeruddin, J.E. Moser, K. Kalyanasundaram, H.J. Bolink, M. Grätzel, M.K. Nazeeruddin, Inorg. Chem. 46, 5989 (2007), doi: 10.1021/ic700435c
• [14] A.B. Tamayo, S. Garon, T. Sajoto, P.I. Djurovich, I.M. Tsyba, R. Bau, M.E. Thompson, Inorg. Chem. 44, 8723 (2005), doi: 10.1021/ic050970t
• [15] L. He, L. Duan, J. Qiao, D. Zhang, L. Wang, Y. Qiu, Org. Electron. 11, 1185 (2010), doi: 10.1016/j.orgel.2010.04.018
• [16] P. Wongkaew, U. Mahanitipong, N. Wongsang, S. Sahasithiwat, R. Jitchati, e-J. Surf. Sci. Nanotech. 12, 141 (2014), doi: 10.1380/ejssnt.2014.141
• [17] H. Tang, Y. Li, Q. Chen, B. Chen, Q. Qiao, W. Yang, H. Wu, Y. Cao, Dyes and Pigments 100, 79 (2014), doi: 10.1016/j.dyepig.2013.07.029
• [18] W.S. Jeon, T.J. Park, S.Y. Kim, R. Pode, J. Jang, J.H. Kwon, Org. Electron. 10, 240 (2009), doi: 10.1016/j.orgel.2008.11.012
• [19] L. He, L. Duan, J. Qiao, D. Zhang, G. Dong, L. Wang, Y. Qiu, Synth. Met. 166, 52 (2013), doi: 10.1016/j.synthmet.2013.01.019
• [20] S.T. Parker, J.D. Slinker, M.S. Lowry, M.P. Cox, S. Bernhard, G.G. Malliaras, Chem. Mater. 17, 3187 (2005), doi: 10.1021/cm050314r
• [21] H.-F. Chen, W.-Y. Hung, S.-W. Chen, T.-C. Wang, S.-W. Lin, S.-H. Chou, C.-T. Liao, H.-C. Su, H.-A. Pan, P.-T. Chou, Y.-H. Liu, K.-T. Wong, Inorg. Chem. 51, 12114 (2012), doi: 10.1021/ic300673k

Identifiers

DOI

10.12693/APhysPolA.127.1109