|Title:||Thiol-end-functionalized Regioregular Poly(3-hexylthiophene) for PbS Quantum Dot Dispersions||Authors:||Yoshida K
|Keywords:||dispersant;nanoparticles;photovoltaics;quantum dots;semiconducting polymer;Conjugated polymers;Conversion efficiency;Fourier transform infrared spectroscopy;High resolution transmission electron microscopy;Infrared devices;IV-VI semiconductors;Light absorption;Monounsaturated fatty acids;Nanocrystals;Nanoparticles;Naphthalene;organic-inorganic materials;Polymer solar cells;Semiconductor quantum dots;Sulfur compounds;Synthesis (chemical);Inorganic nanoparticle;Intermolecular interactions;Ligand exchange reactions;Organic-inorganic hybrid;Photovoltaic applications;Photovoltaic materials;Poly (3-hexylthiophene);Power conversion efficiencies;Lead compounds||Issue Date:||2021||Journal Volume:||3||Journal Issue:||9||Start page/Pages:||4450-4459||Source:||ACS Applied Polymer Materials||Abstract:||
Inorganic nanoparticles hybridized with π-conjugated polymers were successfully synthesized by the ligand exchange reaction of thiol-end-functionalized regioregular poly(3-hexylthiophene) (P3HT-SH) with lead sulfide (PbS) quantum dots (QDs). The hybrid material (P3HT-SH/PbS-QD) shows good dispersibility in organic solvents even after 6 months due to the decreased intermolecular interaction of PbS nanoparticles coated by highly soluble P3HT. The ultraviolet-visible-near infrared absorption spectra show a clear difference in PbS-QDs hybridized with oleic acid and P3HT-SH, depending on the size of the PbS-QDs. By using transmission electron microscopy, small clusters of PbS-QDs are observed at the nanolevel when hybridized with P3HT-SH, indicating the formation of nanoscale aggregates of PbS-QDs in the hybrid material. Preliminary results for fullerene-free photovoltaic applications showed that P3HT-SH/PbS-QD can deliver almost two times higher power conversion efficiency (PCE) than P3HT when paired with an n-type naphthalene-diimide-based semiconducting polymer (N2200) as the photoactive system. Such an increase in PCE can be attributed to the increased dielectric constant exerted by PbS-QDs, which facilitates charge dissociation. This study not only describes a method for synthesizing PbS-QD-based organic-inorganic hybrids but also reveals an interesting design direction for photovoltaic materials. ? 2021 American Chemical Society.
|Appears in Collections:||化學工程學系|
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