TiO Anatase Solutions for Electron Transporting Layers in Organic Photovoltaic Cells.

Reflux of a solution of [Ti O (H O) ]Cl ⋅HCl⋅7 H O as titanium precursor at 120 °C for 24 h leads to a transparent colloidal solution of nanosized crystallized anatase TiO . The adjustment of the particle size and composition of the dispersant is monitored through the initial water content while controlling the conversion of propylene carbonate into propylene glycol during reflux. The solutions were processed as thin films to produce electron transporting layers in hybrid bulk heterojunction solar cells, by using a blend of P3HT:PCBM polymers as absorbers, in inverted architectures.

Rodlike fluorescent pi-conjugated 3,3'-bipyridazine ligand: optical, electronic, and complexation properties.

We report on the design and synthesis of a new quadrupolar pi-conjugated 3,3'-bipyridazine D-A-D ligand. Its electronic and optical properties were investigated. Besides high fluorescence and pronounced solvatochromism, it exhibits an inherent electroactivity exploited to build an organic green light emitting device.