Publication date: 15th December 2025
Relaxation processes in a doped thienothiophene copolymer P(g3TT-T2)
Conjugated polymers have gathered significant interest in recent years for their potential use as materials in electronic devices across applications, such as solar cells, OLEDs, and thermoelectrics. However, optimisation of the electronic performance of organic semiconductors is necessary. Chemical doping is an efficient strategy for achieving high electronic performance on conjugated polymers. However, the ability of molecules and ions to diffuse and sublime tends to limit the thermal stability of many doped organic semiconductors. The nanostructure of doped organic semiconductor films must be thermally stable to ensure a device performance that does not evolve with time. Slow diffusion dynamics characterise the glassy state. In this work, we investigate the glass formation of the polymer p(g3TT-2T) before and after chemical doping using dynamic mechanical thermal analysis (DMTA), Flash scanning calorimetry (FSC) and temperature-dependent Raman spectroscopy.
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