Fabrication of microfluidic electrogenerated chemiluminescence cells incorporated with titanium dioxide nanoparticles to improve luminescent performances
Koji Okada, Ryoichi Ishimatsu, Jun Mizuno, Takashi Kasahara
Abstract
We demonstrated microfluidic electrogenerated chemiluminescence cells incorporated with titanium dioxide nanoparticles (TiO2 NPs). SU-8-based microchannels were fabricated on a fluorine doped tin oxide cathodes-patterned glass substrate. TiO2 NPs were coated on the cathodes as an electron injection layer. The enclosed microchannels were achieved by a direct bonding of the SU-8 surface to an indium tin oxide anode-patterned polyethylene terephthalate film via vacuum ultraviolet treatment. A tris(2,2'-bipyridine)ruthenium(II) solution was used as an emitter. The proposed device exhibited a maximum luminance of 93.5 cd m−2 at 3.3 V, which is 1.45 times higher than that of device without TiO2 NPs.