Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties
AbstractTwo light-emitting polyphenylene dendrimers with both hole and electron transporting moieties were synthesized and characterized. Both molecules exhibited pure blue emission solely from the pyrene core and efficient surface-to-core energy transfers when characterized in a nonpolar environment. In particular, the carbazole- and oxadiazole-functionalized dendrimer (D1) manifested a pure blue emission from the pyrene core without showing intramolecular charge transfer (ICT) in environments with increasing polarity. On the other hand, the triphenylamine- and oxadiazole-functionalized one (D2) displayed notable ICT with dual emission from both the core and an ICT state in highly polar solvents. D1, in a three-layer organic light emitting diode (OLED) by solution processing gave a pure blue emission with Commission Internationale de l’Éclairage 1931 CIE xy = (0.16, 0.12), a peak current efficiency of 0.21 cd/A and a peak luminance of 2700 cd/m2. This represents the first reported pure blue dendrimer emitter with bipolar charge transport and surface-to-core energy transfer in OLEDs. View Full-Text
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Zhang, G.; Auer-Berger, M.; Gehrig, D.W.; Blom, P.W.M.; Baumgarten, M.; Schollmeyer, D.; List-Kratochvil, E.J.W.; Müllen, K. Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties. Molecules 2016, 21, 1400.
Zhang G, Auer-Berger M, Gehrig DW, Blom PWM, Baumgarten M, Schollmeyer D, List-Kratochvil EJW, Müllen K. Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties. Molecules. 2016; 21(10):1400.Chicago/Turabian Style
Zhang, Guang; Auer-Berger, Manuel; Gehrig, Dominik W.; Blom, Paul W.M.; Baumgarten, Martin; Schollmeyer, Dieter; List-Kratochvil, E. J.W.; Müllen, Klaus. 2016. "Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties." Molecules 21, no. 10: 1400.
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