Investigating the doping performance of an ionic dopant for organic semiconductors and thermoelectric applications

• DPI-TPFB demonstrates significant p-doping effect on the organic semiconductor PBBT-2T, confirmed by ESR, UV-vis-NIR absorption, and work function measurements. • Doping with DPI-TPFB enhances the electrical conductivity of PBBT-2T films by over four orders of magnitude. • DPI-TPFB exhibits broad applicability, effectively doping various p-type OSCs and even converting the n-type OSC N2200 to p-type behavior. • DPI-TPFB-doped PBBT-2T films achieve a power factor of approximately 10 μW·m⁻¹·K⁻² in organic thermoelectric devices, highlighting its potential for thermoelectric applications.