A flexible complementary logic circuit built from two identical organic electrochemical transistors*

Organic electrochemical transistor (OECT) with a conjugated polymer as the electrically active channel is the basic unit in organic bioelectronic devices.¹ Increased functionalities can be further achieved by building complementary logic circuits combining more than one OECT in different architectures. The simplest circuit can be built by connecting one p-type and one n-type organic semiconductors in series.² In this study, we build a complementary logic circuit on a flexible substrate with two OECTs having one material as the active channel.³ We demonstrate its DC operation with a gain of ~ 7 and its AC response within a frequency range suitable for physiological applications. Our approach to use one single material as an active channel in both OECTs simplifies the manufacturing process and eliminates the need to source different materials with similar electrical performances.

References:
1. Rivnay, J., Inal, S., Salleo, A., Owens, R.M., et al. Nat. Rev. 3, 17086 (2018).
2. Sun, H., Vagin M., Wang, S., Crispin, X., et al. Adv. Mater. 30, 1–7 (2018).
3. Travaglini, L., Micolich, A., Cazorla, C., Zeglio, E., Lauto, A., Mawad, D. submission under review (2019).