Published 2020 | Version v1
Journal article Metadata-only

Revealing excited states dynamics in cross-linked covalent hybrids of graphene and diketopyrrolopyrrole oligomers via ultrafast transient absorption spectroscopy

Creators

  • 1. Department of Physics, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano (Italy)
  • 2. Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova (Italy)
  • 3. Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia (IIT), Via Giovanni Pascoli, 70/3, 20133, Milan (Italy)

Description

We report on ultrafast dynamics in cross-linked covalent hybrids of graphene and diketopyrrolopyrrole (TDPP) oligomers. Comparisons between non-polymerizing (EXG-TDPP) and polymerizing (c-EXG-TDPP) hybrids show that charge/energy transfer occurs faster than 50 ps in EXGTDPP, while the c-EXG-TDPP system shows quenching within 18 ps. The transient response of c-EXGTDPP is completely quenched (>99%), while in EXG-TDPP full quenching occurs after 1.39 ns. Photocurrent studies of c-EXG-TDPP films show IPCE > 2%, indicating ultrafast charge transfer between TDPP and graphene.

Availability note (English)

Available from https://www.epj-conferences.org/articles/epjconf/pdf/2020/14/epjconf_eosam2020_07007.pdf; https://doaj.org/article/18aefd8943164c658121dee638aa6f53

Additional details

Identifiers

URL
https://www.epj-conferences.org/articles/epjconf/pdf/2020/14/epjconf_eosam2020_07007.pdf; https://doaj.org/article/18aefd8943164c658121dee638aa6f53;
DOI
10.1051/epjconf/202023807007;

Publishing Information

Journal Title
EPJ. Web of Conferences
Journal Volume
238
Journal Page Range
vp.
ISSN
2100-014X

Conference

Title
EOS (European Optical Society) Annual Meeting
Acronym
EOSAM 2020
Dates
7-11 Sep 2020
Place
Porto (Portugal)

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
53093134
Subject category
S77: NANOSCIENCE AND NANOTECHNOLOGY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION SPECTROSCOPY; COVALENCE; EXCITED STATES; GRAPHENE; PHOTOCURRENTS; QUENCHING
Descriptors DEC
CARBON; CURRENTS; ELECTRIC CURRENTS; ELEMENTS; ENERGY LEVELS; NONMETALS; SPECTROSCOPY