A–DA′D–A Nonfullerene Acceptor Obtained by Fine-Tuning Side Chains on Pyrroles Enables PBDB-T-Based Organic Solar Cells with over 14% Efficiency
Source abstract
Abstract
The recent emergence of small acceptor molecules that are nonfullerene (NFSMAs) of A–DA′D–A type, particularly Y6, has accounted for the effective organic solar cells (OSCs). A new acceptor derivative denoted as Y18-DMO using 3,7-dimethyloctyl instead of 2-ethylhexyl on pyrroles of Y18 is reported. Y18-DMO shows the optical gap of 1.37 eV, with the highest occupied and lowest unoccupied molecular orbital energy levels at −5.86 and −3.90 eV, respectively. PBDB-T:Y18-DMO-based photovoltaic devices treated for 40 s by solvent vapor annealing in tetrahydrofuran (THF) yield a power conversion efficiency that reaches 14.18%, which is around the maximum efficiencies among the PBDB-T-based OSCs so far. Besides, these devices exhibit an energy loss as low as 0.55 eV while achieving a large open-circuit voltage of 0.81 V.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
Laboratory of Quantum and Computational Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
Department of Physics, The LNM Institute for Information Technology, Jamdoli, Jaipur 302031, India
Funding
Ministry of Science and Technology of the People's Republic of China · General Secretariat for Research and Technology · Department of Science and Technology, Ministry of Science and Technology · Hellenic Foundation for Research and Innovation · National Natural Science Foundation of China
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