TOSCA Thrust IV: Unraveling Degradation Mechanisms in Non-Fullerene Acceptor Based OSCs Through Advanced Spectroscopy and Device Measurements (ONR White Paper Tracking Number: FY2019-000103-AS)
Abstract
The objectives of this project start with the design and synthesis of a set of stable donor polymersand stable NFAs, yielding efficiencies close to those of the state-of-the-art devices. We will study the fundamental physics and chemistry of these donor-acceptor molecular systems with the goal of establishing a set of chemical design rules for stable bulk BHJ blends. Our goal is to understand at the molecular level how donor and acceptor chemistry affects the interfacial stability and the morphological stability of the blends. With the fundamental understanding of degradation mechanisms and the knowledge of how to control them, we will further enhance the stability of OPV cells using donor polymers and molecular acceptors with a high scalability and high reproducibility. Through careful modifications of the polymer donor and acceptor chemistry to control the chemical purity, planarity, side-groups, crystallinity and miscibility, along with detailed chemical, structural and photophysical characterizations, our final objective is to determine a set of chemistry design rules to determine: (i) the criteria for stable donor polymers and acceptor molecules, (ii) the chemical factors affecting the interface and morphological stability, and (iii) the criteria for obtaining a stable blend given a stable polymer donor and a stable acceptor.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 11, 2020
- Source ID
- N000142012182
Entities
People
- Franky So
Organizations
- North Carolina State University
- Office of Naval Research
- United States Navy