Chemically-doped conjugated polymers are a class of emerging semiconducting materials with unique and advantageous properties distinct from inorganic semiconductors, including solution processability, mechanical flexibility, highly tunable electronic behavior, and intrinsically low thermal conductivity. These properties make them promising candidates for thermoelectric applications, where temperature gradients are converted into electrical energy or vice versa. Such devices are relevant for applications ranging from industrial waste heat recovery to wearable electronics powered by body heat. Research on chemically-doped conjugated polymers has historically focused on maximizing the thermoelectric power factor, which depends on the electrical conductivity and the Seebeck coefficient. However, full quantification of thermoelectric performance also requires knowledge of the thermal conductivity to calculate the thermoelectric figure of merit, a measure of the degree of energetic...