April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)
Symposium Supporters
2024 MRS Spring Meeting
SB02.08.03

Spontaneous Modulation Doping in Semi-Crystalline Conjugated Polymers

When and Where

Apr 25, 2024
9:00am - 9:15am
Room 437, Level 4, Summit

Presenter(s)

Co-Author(s)

Martijn Kemerink1,Aditya Dash1,Shubhradip Guchait2,Dorothea Scheunemann1,Vishnu Vijayakumar2,Nicolas Leclerc3,Martin Brinkmann2

University of Heidelberg1,Institute Charles Sadron2,Université de Strasbourg3

Abstract

Martijn Kemerink1,Aditya Dash1,Shubhradip Guchait2,Dorothea Scheunemann1,Vishnu Vijayakumar2,Nicolas Leclerc3,Martin Brinkmann2

University of Heidelberg1,Institute Charles Sadron2,Université de Strasbourg3
The possibility to control the charge carrier density through doping is one of the defining properties of semiconductors. For organic semiconductors, the doping process is known to come with several problems associated with the dopant compromising the charge carrier mobility by deteriorating the host morphology and/or introducing Coulomb traps. While for inorganic semiconductors these factors can be mitigated through (top-down) modulation doping, this concept has not been employed in organics. Here, we show that properly chosen host/dopant combinations can give rise to spontaneous, bottom-up modulation doping, in which the dopants preferentially sit in an amorphous phase, while the actual charge transport occurs predominantly in a crystalline phase with an unaltered microstructure, spatially separating dopants and mobile charges. Combining experiments and numerical simulations, we show that this leads to exceptionally high conductivities at relatively low dopant concentrations.

Keywords

electrical properties

Symposium Organizers

Xiaodan Gu, University of Southern Mississippi
Chad Risko, University of Kentucky
Bob Schroeder, University College London
Natalie Stingelin, Georgia Institute of Technology

Symposium Support

Bronze
MDPI AG

Session Chairs

Mariano Campoy-Quiles
Xiaodan Gu

In this Session