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20 August 2009 Photoluminescence studies of organic light-emitting devices based on 9,10-bis (2-naphthyl)-2-t-butylanthracene (TBADN)
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We studied changes in photoluminescence yield of 9,10-bis (2-naphthyl)-2-t-butylanthracene (TBADN), a commonly used blue emitter in organic light emitting devices (OLEDs). Our studies show that, unlike in case of tris (8-hydroxyquinoline) aluminum (AlQ3), current flow does not bring about a significant change in TBADN photoluminescence yield under 400nm excitation. We attribute the different behavior of TBADN to its bipolar carrier transport nature, which, in comparison to AlQ3, does not facilitate the build-up of significant space charges. Excitation at 360nm, however, leads to a rapid decrease in photoluminescence yield, even in the absence of electrical stressing, revealing that higher excited states of TBADN are less stable, and suggesting they could be playing a role in OLED electroluminescence degradation.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yichun Luo, Qi Wang, and Hany Aziz "Photoluminescence studies of organic light-emitting devices based on 9,10-bis (2-naphthyl)-2-t-butylanthracene (TBADN)", Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 741503 (20 August 2009);

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