2009
DOI: 10.1063/1.3072622
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Studies of the degradation mechanism of organic light-emitting diodes based on tris (8-quinolinolate)aluminum Alq and 2-tert-butyl-9,10-di(2-naphthyl)anthracene TBADN

Abstract: Previously, radical cation of tris(8-quinolinolate)aluminum (Alq•+) has been associated with the instability of Alq films subjected to holes-only electrical current. Yet, the questions remain (i) whether Alq•+ is the primary source of the intrinsic degradation of bipolar organic light-emitting diodes (OLEDs) based on Alq, (ii) whether Alq•+ reactions result in deep charge traps in holes-only devices as found in bipolar counterparts, and (iii) whether radical cations can be a common source of degradation of OLE… Show more

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Cited by 44 publications
(25 citation statements)
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“…At a certain scan rate, the capacitive component dominates the current, and therefore the observed transient current is proportional to the capacitance. 154 In some cases, this capacitive current may undergo one or two voltage-and ramp-rate-dependent transitions between distinct layer-related capacitances. 19,153,155,490 These transitions provide information about fixed charge and trap densities as well as injection barriers of the investigated devices.…”
Section: Electrical Techniques and Methodsmentioning
confidence: 99%
See 3 more Smart Citations
“…At a certain scan rate, the capacitive component dominates the current, and therefore the observed transient current is proportional to the capacitance. 154 In some cases, this capacitive current may undergo one or two voltage-and ramp-rate-dependent transitions between distinct layer-related capacitances. 19,153,155,490 These transitions provide information about fixed charge and trap densities as well as injection barriers of the investigated devices.…”
Section: Electrical Techniques and Methodsmentioning
confidence: 99%
“…The Kodak group observed lack of reactivity for a fluorescent hydrocarbons rubrene and (2-tert-butyl-9,10-di(2-naphthyl)anthracene (TBADN)), various arylamines, carbazoles, and iridium complexes. 154 These observations suggest that, although some metal chelates and other organic molecules may be susceptible to chemical reactions when ionized in the solid state, it is not a characteristic property of organic molecules used as OLED materials.…”
Section: Role Of Charge Carriersmentioning
confidence: 97%
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“…Particularly, a key challenge that must be overcome in the future is longer operating lifetime of the OLEDs for its piratical application. Studies on degradation mechanism of OLEDs and improvement of OLED lifetime continue to be focus for many researchers up to date [3][4][5][6][7][8][9][10]. For display and lighting applications, the lifetime of OLEDs is an very important issue, which depends not only on the stability of the composition of organic materials, but also on the combination at the metal/organic and organic/organic interfaces [11,12].…”
Section: Introductionmentioning
confidence: 99%