Semiconducting Spaghetti-like Organic-Inorganic Nanojunctions via Sequential Self-Assembly of Conjugated Polymers and Quantum Dots

Bijun Ni, Chao Fu, Shuang Pan, Luze He, Zhiqun Lin, Juan Peng

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The ability to direct semiconducting polymers and inorganic nanomaterials into complex assemblies renders the creation of organic-inorganic nanocomposites with unique properties and functionalities. Herein, we report the crafting of highly interconnected semiconducting organic-inorganic nanocomposites (referred to as nanojunctions) comprising long poly(3-hexylthiophene) (P3HT) nanowires and lead telluride (PbTe) quantum dots (QDs) via two successive self-assembly processes. First, P3HT chains self-assemble into ultralong one-dimensional (1D) nanowires owing to interchain π-πstacking, followed by self-assembly of PbTe QDs on both sides of the P3HT nanowires driven by attractive van der Waals interactions between the hexyl side chains of P3HT and aliphatic chains capped on the surface of PbTe QDs. Notably, an integrated experimental and Monte Carlo (MC) simulation study reveals that the surface coverage of PbTe QDs within the P3HT/PbTe nanojunctions as well as the distance between adjacent PbTe QDs could be conveniently tailored via tuning the QD concentration. Interestingly, the photoluminescence of P3HT progressively decreases with an increased loading of PbTe QDs because of effective charge transfer from P3HT to PbTe. Conceptually, this two-step self-assembly strategy can be readily extended to other semiconducting polymers and a diversity of nanomaterials for potential applications in optoelectronic materials and devices.

Original languageEnglish
Pages (from-to)847-853
Number of pages7
JournalChemistry of Materials
Volume34
Issue number2
DOIs
StatePublished - 25 Jan 2022

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Foundation of China (21922503) and the Natural Science Foundation of Shanghai (21ZR1405800).

Publisher Copyright:
© 2022 American Chemical Society.

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