Processable High Electron Mobility π‐Copolymers via Mesoscale Backbone Conformational Ordering
Abstract
The synthesis and experimental/theoretical characterization of a new series of electron‐transporting copolymers based on the naphthalene bis(4,8‐diamino‐1,5‐dicarboxyl)amide (NBA) building block are reported. Comonomers are designed to test the emergent effects of manipulating backbone torsional characteristics, and density functional theory (DFT) analysis reveals the key role of backbone conformation in optimizing electronic delocalization and transport. The NBA copolymer conformational and electronic properties are characterized using a broad array of molecular/macromolecular, thermal, optical, electrochemical, and charge transport techniques. All NBA copolymers exhibit strongly aggregated morphologies with significant nanoscale order. Copolymer charge transport properties are investigated in thin‐film transistors and exhibit excellent electron mobilities ranging from 0.4 to 4.5 cm2 V−1 s−1. Importantly, the electron transport efficiency correlates with the film mesoscale order, which emerges from comonomer‐dependent backbone planarity and extension. These results illuminate the key NBA building block structure–morphology–bulk property design relationships essential for processable, electronics‐applicable high‐performance polymeric semiconductors.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 10, 2021
- Source ID
- 10.1002/adfm.202009359
Entities
People
- Alexandra Harbuzaru
- Antonio Facchetti
- Binghao Wang
- Brian J. Eckstein
- Eric F. Manley
- Ferdinand S Melkonyan
- Gang Wang
- Lin Chen
- Rocío Ponce Ortiz
- Simone Fabiano
- Tobin J. Marks
Organizations
- Air Force Office of Scientific Research
- Argonne National Laboratory
- Government of Andalusia
- Linköping University
- Ministry of Science of Spain
- National Institute of Standards and Technology
- National Science Foundation
- Northwestern University
- Office of Basic Energy Sciences
- Office of Science
- Swedish Governmental Agency for Innovation Systems
- Swedish Research Council
- United States Department of Commerce
- United States Department of Energy
- Universidad de Málaga