Dresden 2020 – wissenschaftliches Programm
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CPP 73.8: Vortrag
Mittwoch, 18. März 2020, 18:15–18:30, ZEU 260
Impact of Thermal Treatment and Humidity on Work Function of PEDOT:PSS Thin Films — •Aman Anand1,2,3, Jose Prince Madalaimuthu1,2,3, Rico Meitzner1,2,3, Shahidul Alam1,2,3, Ulrich S. Schubert1,2,3, and Harald Hoppe1,2,3 — 1Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University Jena, Jena, Germany — 2Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Jena, Germany — 3Jena Center for Soft Matter (JCSM), Friedrich Schiller University, Jena, Germany
Poly (3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is the most common and commercially, successful conductive polyelectrolyte in the field of optoelectronics. Its properties such as high transparency in the visible range, electrical conductivity, and work function enable multiple applications in the field of electronics. Properly tuning the work functions within semiconductor devices is very crucial in terms of performance and may be strongly influenced by unmonitored processing conditions. For example, PEDOT:PSS is highly hygroscopic in nature, which may impact on its functionality. In the present work, we have investigated the impact of the thermal treatments and relative humidity during film casting or storage on the work function of PEDOT:PSS films. We find clear trends between the processing conditions and absolute work function as obtained with a carefully calibrated Kelvin Probe setup. As a conclusion, we can suggest suitable processing parameters for a wide range of formulations and targeted electronic properties.