Selective Doping of a Single Ambipolar Organic Semiconductor for Device Fabrication

The idea of acquiring p- and n-type organic semiconductors (OSCs) through controllable doping of a single OSC is highly attractive. However, the realization of this idea remains challenging due to the difficulties in achieving effective p- and n-doping on a single OSC simultaneously. Herein, by synthesizing a solution-processable conjugated polymer with well-balanced ambipolar transport as the host semiconductor and using appropriate dopants, we demonstrate the feasibility of obtaining p- and n-type OSCs from a single OSC. The successful doping control of the polarity and electrical property of the OSC is confirmed by electrical characterizations on doped devices. Then, solution-processed organic inverters based on the p- and n-doped OSC films are constructed. The results provide a paradigm for utilizing doping technique in organic semiconductor devices.