Morphology, Crystal Structure and Charge Transport in Donor-Acceptor Block Copolymer Thin Films

Gaurav Gupta; Chetan R. Singh; Ruth H. Lohwasser; Marcel Himmerlich; Stefan Krischok; Peter Müller-Buschbaum; Mukundan Thelakkat; Harald Hoppe; Thomas Thurn-Albrecht

doi:10.1021/am5049948

Morphology, Crystal Structure and Charge Transport in Donor-Acceptor Block Copolymer Thin Films

Gaurav Gupta
, Chetan R. Singh
, Ruth H. Lohwasser
, Marcel Himmerlich
, Stefan Krischok
, Peter Müller-Buschbaum
, Mukundan Thelakkat
, Harald Hoppe
, Thomas Thurn-Albrecht

Chair of Functional Materials

Martin Luther University Halle-Wittenberg
Ilmenau University of Technology
Universität Bayreuth

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We studied structure and charge transport properties of thin films of donor-acceptor block copolymers, poly(3-hexylthiophene-block-perylene bisimide acrylate), using a combination of X-ray scattering, AFM and vertical charge transport measurements in diode devices. Block copolymer self-assembly and crystallization of the individual components are interrelated and different structural states of the films could be prepared by varying preparation conditions and thermal history. Generally the well-defined microphase structures found previously in bulk could also be prepared in thin films, in addition alignment induced by interfacial interactions was observed. Microphase separated block copolymers sustain ambipolar charge transport, but the exact values of electron and hole mobilities depend strongly on orientation and connectivity of the microdomains as well as the molecular order within the domains.

Original language	English
Pages (from-to)	12309-12318
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	23
DOIs	https://doi.org/10.1021/am5049948
State	Published - 17 Jun 2015

Keywords

X-ray scattering
charge carrier mobility
crystal texture
donor-acceptor block copolymers
microphase structure
thin films

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10.1021/am5049948

Cite this

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title = "Morphology, Crystal Structure and Charge Transport in Donor-Acceptor Block Copolymer Thin Films",

abstract = "We studied structure and charge transport properties of thin films of donor-acceptor block copolymers, poly(3-hexylthiophene-block-perylene bisimide acrylate), using a combination of X-ray scattering, AFM and vertical charge transport measurements in diode devices. Block copolymer self-assembly and crystallization of the individual components are interrelated and different structural states of the films could be prepared by varying preparation conditions and thermal history. Generally the well-defined microphase structures found previously in bulk could also be prepared in thin films, in addition alignment induced by interfacial interactions was observed. Microphase separated block copolymers sustain ambipolar charge transport, but the exact values of electron and hole mobilities depend strongly on orientation and connectivity of the microdomains as well as the molecular order within the domains.",

keywords = "X-ray scattering, charge carrier mobility, crystal texture, donor-acceptor block copolymers, microphase structure, thin films",

author = "Gaurav Gupta and Singh, \{Chetan R.\} and Lohwasser, \{Ruth H.\} and Marcel Himmerlich and Stefan Krischok and Peter M{\"u}ller-Buschbaum and Mukundan Thelakkat and Harald Hoppe and Thomas Thurn-Albrecht",

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language = "English",

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journal = "ACS Applied Materials and Interfaces",

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AU - Gupta, Gaurav

AU - Singh, Chetan R.

AU - Lohwasser, Ruth H.

AU - Himmerlich, Marcel

AU - Krischok, Stefan

AU - Müller-Buschbaum, Peter

AU - Thelakkat, Mukundan

AU - Hoppe, Harald

AU - Thurn-Albrecht, Thomas

PY - 2015/6/17

Y1 - 2015/6/17

N2 - We studied structure and charge transport properties of thin films of donor-acceptor block copolymers, poly(3-hexylthiophene-block-perylene bisimide acrylate), using a combination of X-ray scattering, AFM and vertical charge transport measurements in diode devices. Block copolymer self-assembly and crystallization of the individual components are interrelated and different structural states of the films could be prepared by varying preparation conditions and thermal history. Generally the well-defined microphase structures found previously in bulk could also be prepared in thin films, in addition alignment induced by interfacial interactions was observed. Microphase separated block copolymers sustain ambipolar charge transport, but the exact values of electron and hole mobilities depend strongly on orientation and connectivity of the microdomains as well as the molecular order within the domains.

AB - We studied structure and charge transport properties of thin films of donor-acceptor block copolymers, poly(3-hexylthiophene-block-perylene bisimide acrylate), using a combination of X-ray scattering, AFM and vertical charge transport measurements in diode devices. Block copolymer self-assembly and crystallization of the individual components are interrelated and different structural states of the films could be prepared by varying preparation conditions and thermal history. Generally the well-defined microphase structures found previously in bulk could also be prepared in thin films, in addition alignment induced by interfacial interactions was observed. Microphase separated block copolymers sustain ambipolar charge transport, but the exact values of electron and hole mobilities depend strongly on orientation and connectivity of the microdomains as well as the molecular order within the domains.

KW - X-ray scattering

KW - charge carrier mobility

KW - crystal texture

KW - donor-acceptor block copolymers

KW - microphase structure

KW - thin films

UR - https://www.scopus.com/pages/publications/84934947887

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DO - 10.1021/am5049948

M3 - Article

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SN - 1944-8244

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JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 23

ER -

Morphology, Crystal Structure and Charge Transport in Donor-Acceptor Block Copolymer Thin Films

Abstract

Keywords

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