Blue-coloured highly efficient dye-sensitized solar cells by implementing the diketopyrrolopyrrole chromophore.

ABSTRACT: The paradigm shift in dye sensitized solar cells (DSCs) - towards donor- ? bridge-acceptor (D-?-A) dyes - increases the performances of DSCs and challenges established design principles. Framed by this shifting landscape, a series of four diketopyrrolopyrrole (DPP)-based sensitizers utilizing the donor-chromophore-anchor (D-C-A) motif were investigated computationally, spectroscopically, and fabricated by systematic evaluation of finished photovoltaic cells. In all cases, the [Co(bpy)3](3+/2+) redox-shuttle afforded superior performance compared to I3(-)/I(-). Aesthetically, careful molecular engineering of the DPP chromophore yielded the first example of a high-performance blue DSC - a challenge unmet since the inception of this photovoltaic technology: DPP17 yields over 10% power conversion efficiency (PCE) with the [Co(bpy)3](3+/2+) electrolyte at full AM 1.5 G simulated sun light.

SUBMITTER: Yum JH 

PROVIDER: S-EPMC3744082 | biostudies-other | 2013

REPOSITORIES: biostudies-other