New blue phosphorescent iridium complexes for OLEDs

2012 ◽  
Vol 20 (1) ◽  
pp. 70 ◽  
Author(s):  
Michelle Groarke ◽  
Sven Andresen ◽  
Jenny O'Connell ◽  
Tadahiko Hirai ◽  
Karl Weber ◽  
...  
Keyword(s):  
Iridium Complexes ◽  
Blue Phosphorescent

scholarly journals Studies on the photodegradation of red, green and blue phosphorescent OLED emitters

2013 ◽  
Vol 9 ◽  
pp. 2088-2096 ◽  
Author(s):  
Susanna Schmidbauer ◽  
Andreas Hohenleutner ◽  
Burkhard König
Keyword(s):  
Singlet Oxygen ◽  
Excited States ◽  
Structural Changes ◽  
Degradation Products ◽  
Analytical Techniques ◽  
Iridium Complexes ◽  
Degradation Processes ◽  
Device Processing ◽  
Halogenated Solvents ◽  
Blue Phosphorescent

The photodegradation behavior of four well-established iridium emitters was investigated. Irradiation of the samples in different solvents and under atmospheric as well as inert conditions helped to identify several pathways that can contribute to the deterioration of these compounds. Degradation via singlet oxygen or the excited states of the emitters as well as the detrimental influence of halogenated solvents are discussed for the different investigated iridium complexes. Some of the resulting degradation products could be identified by using LC–MS or other analytical techniques. The results show how even small structural changes can have a huge influence on rate and mechanism of the photodegradation. The observations from this study may help to better understand degradation processes occurring during the handling of the materials, but also during device processing and operation.

Functionalized phenylimidazole-based facial-homoleptic iridium(iii) complexes and their excellent performance in blue phosphorescent organic light-emitting diodes

2018 ◽  
Vol 6 (16) ◽  
pp. 4565-4572 ◽  
Author(s):  
Youngjae Kwon ◽  
Si Hyun Han ◽  
Seokhyeon Yu ◽  
Jun Yeob Lee ◽  
Kang Mun Lee
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complexes ◽  
Excellent Performance ◽  
Light Emitting ◽  
Organic Light ◽  
Blue Phosphorescent

Novel phenylimidazole-based blue-emitting iridium complexes were prepared and they showed the excellent electroluminescent performance.

scholarly journals Blue-phosphorescent bis-cyclometalated iridium complexes with aryl isocyanide ancillary ligands

Polyhedron ◽  
2020 ◽  
Vol 178 ◽  
pp. 114332 ◽  
Author(s):  
Louise M. Cañada ◽  
Johanna Kölling ◽  
Thomas S. Teets
Keyword(s):  
Iridium Complexes ◽  
Ancillary Ligands ◽  
Blue Phosphorescent

Syntheses and photophysical properties of optical-active blue-phosphorescent iridium complexes bearing asymmetric tridentate ligands

2009 ◽  
pp. 1700 ◽  
Author(s):  
Misa Ashizawa ◽  
Lifen Yang ◽  
Katsuaki Kobayashi ◽  
Hisako Sato ◽  
Akihiko Yamagishi ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Iridium Complexes ◽  
Tridentate Ligands ◽  
Blue Phosphorescent

Understanding the efficiency drooping of the deep blue organometallic phosphors: a computational study of radiative and non-radiative decay rates for triplets

2016 ◽  
Vol 4 (28) ◽  
pp. 6829-6838 ◽  
Author(s):  
Qian Peng ◽  
Qinghua Shi ◽  
Yingli Niu ◽  
Yuanping Yi ◽  
Shaorui Sun ◽  
...  
Keyword(s):  
First Principles ◽  
Radiative Decay ◽  
Computational Study ◽  
Decay Rates ◽  
Iridium Complexes ◽  
P Efficiency ◽  
Molecular Parameters ◽  
Deep Blue ◽  
Blue Phosphorescent

Efficiency drooping in blue phosphorescent iridium complexes has been rationalized through figuring out key molecular parameters to control the radiative and non-radiative rates at the first-principles level.

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