Organic Solid-Solution Semiconductors Based on the Combination of p- and n-Type Semiconductors and Their Application in Field-Effect Transistors

The adjustment of the organic field-effect transistor (OFET) operation mode is crucial to meet the demands of logic circuits. Solid-solution semiconductors provide an effective strategy to continuously tune optoelectronic properties depending on component ratios. Herein, organic solid-solution semiconductors (F16ZnPc)x(PEN)1–x are achieved by coevaporation. The film morphology and lattice constant can be tuned continuously with varying component ratios due to molecular interactions, which is demonstrated by the changes of peaks and charge transfer. Consequently, the threshold voltage of OFETs based on (F16ZnPc)x(PEN)1–x solid solutions can be adjusted over a wide range, resulting in the operation mode that can be tuned just depending on composition ratios. Moreover, the variation of conductance is demonstrated by planar diodes.