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Effect of TiO2 Nanoparticles on Electrochemiluminescent Properties in Ru(bpy)3-based Emissive Display
Mitsuo Takase, Shunichi Sugimoto, Kazuki Nakamura and Norihisa Kobayashi

Electrochemiluminescence (ECL) is known as an electrochemical reaction exhibiting emission, and is applicable to new imaging devices. We have been studying the emission characteristics of ECL cells containing a ruthenium (II) complex as the luminescent species. The emission turn-on response time and emission intensity were dramatically improved by introducing the AC method. In this paper, we studied the effects of TiO2 nanoparticles (Rutile & Anatase) on the electrochemiluminescence of Ru(bpy)3(PF6)2. The emission intensity and ECL lifetime were dramatically improved by TiO2 nanoparticles. The luminescence property of ECLs are strongly affected by TiO2 nanoparticles.The luminescence of ECL cells with TiO2 (rutile) is 5 times higher than ECL cells without TiO2. The luminescence of cells with TiO2 (rutile & anatase) are more durable compared to ECL cells without TiO2.

Keywords: Electrochemiluminescence (ECL), Ru(bpy)3(PF6)2, Emissive Display, Ionic Liquid, TiO2 nanoparticles

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