DataVXChemistry of MaterialsPaper
journal article·2024-01-09Open access

Tuning the Mobility of Indacenodithiophene-Based Conjugated Polymers via Coplanar Backbone Engineering

Xiaozhou Ji, Hao-Wen Cheng, Nathaniel J. Schuster, Garrett S. LeCroy, Song Zhang, Yilei Wu, Lukas Michalek, Bao-Nguyen T. Nguyen, Jerika A. Chiong, Max Schrock, Yoko Tomo, Jeromy Rech, Alberto Salleo, Sangah Gam, Gae Hwang Lee, Jeffrey B.-H. Tok, Zhenan Bao

Chemistry of Materials· Volume 36· Issue 1
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Source abstract

Abstract

Conjugated polymers based on indacenodithiophene–benzothiadiazole ( IDT–BT ) have attracted great interest due to their high charge carrier mobilities while being low crystallinity (i.e., near-amorphous). They represent a promising design strategy to achieve both excellent stretchability and electrical performance. Here, we describe an approach to structural modifications of IDT–BT, namely, by introducing noncovalent interactions and substituting building blocks to promote extended coplanar backbones. We systematically investigated the effects of structural modifications on backbone conformation, polymer aggregations, and charge carrier mobilities. Among the investigated polymers, the fluorinated derivative IDT–FBT demonstrated the highest charge carrier mobility of 5.19 cm 2 /(V·s), along with low activation energy and Urbach energy, indicating its low energy disorder level. The high mobility was attributed to the higher backbone planarity reinforced by S···F and H···F noncovalent interactions and improved interchain interactions through strong aggregation. Our findings indicate that increasing backbone coplanarity may further improve mobility in low-crystallinity conjugated polymers.
Source: openalex_inverted_index · Quality: baseline

Research context

PolymersComposites

OpenAlex topics: Organic Electronics and Photovoltaics · Advanced Sensor and Energy Harvesting Materials · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States

Department of Material Science and Engineering, Stanford University, Stanford, California 94305, United States

Department of Chemistry, Stanford University, Stanford, California 94305, United States

Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan

Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 16678, South Korea

Funding

Oak Ridge Institute for Science and Education · Samsung Advanced Institute of Technology · Basic Energy Sciences · Deutsche Forschungsgemeinschaft · Office of the Director of National Intelligence · Japan Society for the Promotion of Science · Office of Naval Research · Division of Electrical, Communications and Cyber Systems · U.S. Department of Energy · National Defense Science and Engineering Graduate · Association of American University Women · Department of Defense

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