| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
|
|
|
|
Highly Efficient Greenish-Yellow Phosphorescent Organic Light-Emitting Diodes Based on a Novel 2,3-Diphenylimidazo[1,2-a]Pyridine Iridium(III) Complex |
| Jun Sun1**, Min Xi1, Zi-Sheng Su2, Hai-Xiao He1, Mi Tian1, Hong-Yan Li1, Hong-Ke Zhang1, Tao Mao1, Yu-Xiang Zhang1 |
1Xi'an Manareco New Materials Co., Ltd. Xi'an 710077
2State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033
|
|
| Cite this article: |
|
Jun Sun, Min Xi, Zi-Sheng Su et al 2016 Chin. Phys. Lett. 33 038501 |
|
|
|
|
Abstract A cyclometalated greenish-yellow emitter 2,3-diphenylimidazo[1,2-a]pyridine iridium(III) complex is successfully synthesized and used to fabricate phosphorescent organic light-emitting diodes. The optimized device exhibits a greenish-yellow emission with the peak at 523 nm and a strong shoulder at 557 nm, corresponding to Commission Internationale de l'Eclairage coordinates of (0.38, 0.58). The full width at half maximum of the device is 93 nm, which is broader than the fac-tris(2-phenylpyridine)iridium [Ir(ppy)$_{3}$] based reference device of 78 nm. Meanwhile, a maximum current efficiency of 62.6 cd/A (47.5 lm/W) is obtained. This result is higher than a maximum current efficiency of 54.8 cd/A (43 lm/W) of the Ir(ppy)$_{3}$ based device. The results indicate that this new iridium complex may have potential applications in fabricating high color rendering index white organic light emitting diodes.
|
|
|
Received: 19 August 2015
Published: 31 March 2016
|
|
|
|
|
|
|
|
| [1] | Tang C W and VanSlyke S A 1987 Appl. Phys. Lett. 51 913 | | [2] | Sun Y et al 2006 Nature 440 908 | | [3] | Reineke S et al 2009 Nature 459 234 | | [4] | Zhang Z Q et al 2014 Chin. Phys. Lett. 31 046801 | | [5] | Rai V K et al 2013 J. Mater. Chem. C 1 677 | | [6] | Adachi C et al 2001 J. Appl. Phys. 90 5048 | | [7] | Uoyama H et al 2012 Nature 492 234 | | [8] | Zhou G J et al 2009 Chem. Commun. 24 3574 | | [9] | Zhou G J et al 2010 J. Mater. Chem. 20 7472 | | [10] | Rosenow T C et al 2010 J. Appl. Phys. 108 113113 | | [11] | Jou J H et al 2011 Org. Electron. 12 865 | | [12] | Zhao Y B et al 2011 Appl. Phys. Lett. 99 633031 | | [13] | Park Y S et al 2008 Adv. Mater. 20 1957 | | [14] | So K H et al 2012 Dyes Pigm. 92 603 | | [15] | Chen S M et al 2011 Adv. Funct. Mater. 21 3785 | | [16] | Seo J A et al 2015 J. Mater. Chem. C 3 4640 | | [17] | Cui L S et al 2013 J. Mater. Chem. C 1 3967 | | [18] | Wang J et al 2013 Organic Electron. 14 2854 | | [19] | Yang X L, Zhao Y B, Zhang X W, Li R, Dang J S, Li Y, Zhou G J, Wu Z X, Ma D G, Wong W Y, Zhao X, Ren A M, Wang L X and Hou X 2012 J. Mater. Chem. 22 7136 | | [20] | Reineke S, Walzer K and Leo K 2007 Phys. Rev. B 75 125328 | | [21] | Wu Z X, Wang L D, Lei G T and Qiu Y 2005 J. Appl. Phys. 97 103105 | | [22] | Jeon S O, Jang S E, Son H S and Lee J Y 2011 Adv. Mater. 23 1436 |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
