Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 22: Biocompatible Organic Semiconductors
HL 22.1: Talk
Wednesday, March 11, 2026, 09:30–09:45, POT/0006
Stable n-Type OECTs with BBL: Unlocking Complementary Circuits — •Clemens Rößler1,2, Laura Teurle1,2, Hans Kleemann1,2, and Karl Leo1,2 — 1Dresden Integrated Center for Applied Physics and Photonic Materials — 2TU Dresden
Organic mixed ionic-electronic conductors (OMIECs) have emerged as a key materials platform for next-generation bioelectronics, energy-efficient signal processing, and neuromorphic computing. Among the most versatile OMIEC devices is the organic electrochemical transistor (OECT), whose ability to couple ionic and electronic transport enables low-voltage operation and is particularly advantageous for solid-state electrolyte systems that enable densely integrated circuitry. While p-type materials such as PEDOT:PSS have driven much of the field's progress, the lack of stable and high-performance n-type counterparts remains a critical bottleneck - limiting the realization of complementary circuits, low-power logic, and more complex bioelectronic architectures. In this talk, I present recent progress on n-type OECTs based on the ladder polymer poly(benzimidazobenzophenanthroline) (BBL). I will discuss how we have developed and optimized n-type OECTs that exhibit remarkable stability and a unique electrochemical conditioning behaviour. Spectroscopic, AFM, and transfer curve analyses show that BBL combines excellent optical and morphological stability with a high mobility capacitance product, indicating efficient ion penetration and intrinsically high electronic mobility.
Keywords: OECT; OMIEC; BBL; n-Type; Complementary Circuits