A Small Molecule Composed of Dithienopyran and Diketopyrrolopyrrole
as Versatile Electron Donor Compatible with Both Fullerene and Nonfullerene
Electron Acceptors for High Performance Organic Solar Cells
A new conjugated small molecule composed
of dithienopyran and diketopyrrolopyrrole
(DTP-DPP) was synthesized. Since DTP-DPP has advantageous optoelectronic
properties for photovoltaic applications such as intense and broad
light absorption, proper frontier energy levels, high crystallinity,
and high hole mobility, the devices fabricated from the blend with
PC71BM and P(NDI2OD-T2) exhibit high power conversion efficiencies
of 6.88% and 4.82%, respectively. This work demonstrates that DTP-DPP
is a versatile electron donor compatible with both fullerene and nonfullerene
acceptors for high performance SM-OSCs
