期刊
ADVANCED MATERIALS
卷 34, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202205009
关键词
all-polymer organic photovoltaic cells; flexible photovoltaic cells; polymer acceptors; power conversion efficiency; wide bandgap polymers
类别
资金
- National Natural Science Foundation of China [52120105005, 21835006, 52003275]
- Key Research Program of the Chinese Academy of Sciences [XDPB13]
- Peiyang scholar program of Tianjin University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
The development of polymerized small-molecule acceptors has improved the power conversion efficiencies (PCEs) of all-polymer organic photovoltaic (OPV) cells. However, suitable polymer donors for all-polymer OPV cells are still lacking. In this study, a new polymer donor named PQM-Cl is designed and its photovoltaic performance is explored.
The development of polymerized small-molecule acceptors has boosted the power conversion efficiencies (PCEs) of all-polymer organic photovoltaic (OPV) cells to 17%. However, the polymer donors suitable for all-polymer OPV cells are still lacking, restricting the further improvement of their PCEs. Herein, a new polymer donor named PQM-Cl is designed and its photovoltaic performance is explored. The negative electrostatic potential and low average local ionization energy distribution of the PQM-Cl surface enable efficient charge generation and transfer process. When blending with a well-used polymer acceptor, PY-IT, the PQM-Cl-based devices deliver an impressive PCE of 18.0% with a superior fill factor of 80.7%, both of which are the highest values for all-polymer OPV cells. The relevant measurements demonstrate that PQM-Cl-based films possess excellent mechanical and flexible properties. As such, PQM-Cl-based flexible photovoltaic cells are fabricated and an excellent PCE of 16.5% with high mechanical stability is displayed. These results demonstrate that PQM-Cl is a potential candidate for all-polymer OPV cells and provide insights into the design of polymer donors for high-efficient all-polymer OPV cells.
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