Influence of dopant size and doping method on the structure and thermoelectric properties of PBTTT films doped with F₆TCNNQ and F₄TCNQ

Abstract

Doped polymer semiconductors are ideal candidates to capture waste heat in ambient conditions using modest temperature gradients close to room temperature. Mastering the doping mechanism of polymer semiconductors is therefore...

Rubbing and Drawing: Generic Ways to Improve the Thermoelectric Power Factor of Organic Semiconductors?

“…A short summary of the experiments is given in the methods section, for full details we refer to Refs. [6,17,18] Figure 4 shows the experimentally determined conductivity dependence of the thermopower and power factor together with the results of the kMC simulations. In the perpendicular direction, the experimentally determined thermopower follow a universal curve, independent of the polymer or the dopant used.…”

Synthesis and charge transfer characteristics of a ruthenium–acetylide complex

“…Previous studies of molecular semiconductors doped with F 6 TCNNQ in solid and dissolved form have identied the absorption spectrum of reduced F 6 TCNNQ. [18][19][20] According to those publications the spectrum of F 6 TCNNQ À consists of a peak at 1140 nm which is followed by vibronic satellites at smaller wavelengths. The excitation energy in our case is smaller (around 960 nm) and we cannot resolve satellites.…”

Intercalation and Ordering of F6TCNNQ and F4TCNQ Dopants in Regioregular Poly(3-hexylthiophene) Crystals: Impact on Anisotropic Thermoelectric Properties of Oriented Thin Films

“…Various doping methods have been investigated such as mixed solution/sequential processing [5,13,16], vapor phase doping [20], electrochemical doping [21,22] and more recently incremental concentration doping (ICD). [23] Mixed polymer/dopant solution processing [24,25] is quite ineffective due to the poor resulting film quality and low TE performances. In strong contrast, with sequential doping, the dopant molecules are intercalated into the crystals of PSCs and that the pristine order of the polymer is preserved upon doping.…”