Planar Star-Shaped Organic Semiconductor with Fused Triphenylamine Core for Solution-Processed Small-Molecule Organic Solar Cells and Field-Effect Transistors

The symmetrical planar star-shaped organic semiconductor DMM-TPA-[DTS(BTTh3)]3 with fused TPA core donor and three branch motifs, DTS(BTTh3), exhibited efficient p-type semiconducting performance in solution-processed SMOSCs and OFETs compared to the tilted star-shaped TPA-[DTS(BTTh3)]3; a noteworthy PCE value of 4.16% was observed, with a hole mobility and on/off ratio of 7.6 × 10–3 cm2 V–1 s–1 and 5 × 106, respectively.