Excited-State Interaction of Semiconducting Single-Walled Carbon Nanotubes with Their Wrapping Polymers

Kahmann S, Salazar Rios JM, Zink M, Allard S, Scherf U, Dos Santos MC, Brabec C, Loi MA (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Journal of Physical Chemistry Letters American Chemical Society

Publisher: American Chemical Society

Book Volume: 8

Pages Range: 5666-5672

Journal Issue: 22

DOI: 10.1021/acs.jpclett.7b02553

Abstract

ABSTRACT: We employ photoluminescence and pump−probe spectroscopy
on films of semiconducting single-walled carbon nanotubes (CNTs) of
different chirality wrapped with either a wide band gap polyfluorene derivative
(PF12) or a polythiophene with narrower gap (P3DDT) to elucidate the
excited states’ interplay between the two materials. Excitation above the
polymer band gap gives way to an ultrafast electron transfer from both
polymers toward the CNTs. By monitoring the hole polaron on the polymer
via its mid infrared signature, we show that also illumination below the
polymer band gap leads to the formation of this fingerprint and infer that holes
are also transferred toward the polymer. As this contradicts the standard way
of discussing the involved energy levels, we propose that polymer-wrapped
CNTs should be considered as a single hybrid system, exhibiting states shared
between the two components. This proposition is validated through quantum chemical calculations that show hybridization of
the first excited states, especially for the thiophene−CNT sample.

Authors with CRIS profile

Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET) (i-MEET)

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

University of Groningen / Rijksuniversiteit Groningen NL Netherlands (NL) Bergische Universität Wuppertal DE Germany (DE)

How to cite

APA:

Kahmann, S., Salazar Rios, J.M., Zink, M., Allard, S., Scherf, U., Dos Santos, M.C.,... Loi, M.A. (2017). Excited-State Interaction of Semiconducting Single-Walled Carbon Nanotubes with Their Wrapping Polymers. Journal of Physical Chemistry Letters, 8(22), 5666-5672. https://doi.org/10.1021/acs.jpclett.7b02553

MLA:

Kahmann, Simon, et al. "Excited-State Interaction of Semiconducting Single-Walled Carbon Nanotubes with Their Wrapping Polymers." Journal of Physical Chemistry Letters 8.22 (2017): 5666-5672.

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