Ultrafast interface charge transfer dynamics on P3HT/MWCNT nanocomposites probed by resonant Auger spectroscopy

Abstract

The electronic coupling between P3HT polymer and multi-walled carbon nanotubes was elucidated using NEXAFS and core hole clock approaches.

Charge Transfer in the P(g42T-T):BBL Organic Polymer Heterojunction Measured with Core-Hole Clock Spectroscopy

“…With a tunable X-ray source, the sulfur 1s core level in the donor polymer can be resonantly excited and the intensity ratio between subsequent decay channels can be studied (Figure ). Measuring multiple decay channels following resonant excitation gives insights into electron dynamics during the core-hole lifetime which may be in the subfemtosecond timescale. ,− The CHC method was utilized to study ultrafast charge transfer from the sulfur atom in the donor polymer. This method has been successfully applied to similar systems, providing an estimate of the charge dynamics in van der Waals heterojunctions …”

Enhancing thermoelectric performance of single-walled carbon nanotube/reduced graphene oxide composites with small organic molecules as a novel additive

“…Compound 1 was designed by taking into account the following factors: the inclusion of the terthiophene moiety in the design of compound 1 is based on its known capability for efficient charge carrier transport 34,35 and favourable p-p interactions with carbon materials. 36,37 Furthermore, the large p-surface of the phenanthroimidazole moiety can facilitate the intercalation of 1 into multilayers of rGO through effective p-p interactions. 38 Precursor 3 having no octyl chains was not dispersed with rGO dispersant due to its poor solubility in organic solvents.…”

Spectroscopic study of D1–A–D2–A terpolymer films for optoelectronic applications

“…However, this result attests to a slower charge transfer dynamics than typical polymers applied in photovoltaic devices, such as P3HT, whose times are usually shorter than 12 fs. 16,33 The sulfur KL 2,3 L 2,3 Auger decay spectrum shows a low charge transfer rate when probing the BT unit, which may indicate a low charge transfer susceptibility that may be related to its strong acceptor character. 4 This can be explained by the fact that the unoccupied energy levels probed are not sufficiently delocalized to promote efficient charge transfer.…”