摘要：The paradigm shift in dye sensitized solar cells (DSCs) – towards donor- π bridge-acceptor (D-π-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.
