Naphthalene diimide-difluorobenzene-based polymer acceptors for all-polymer solar cells
Ping Deng1, Carr Hoi Yi Ho, Yong Lu
1College of Materials Science and Engineering, Fuzhou University, Fuzhou, China.
Chemical Communications (Cambridge, England)
|March 7, 2017
Summary
New polymer acceptors with difluorobenzene-naphthalene units were synthesized for all-polymer solar cells (all-PSCs). The regular polymer (P2) showed improved crystallinity, leading to higher efficiency over 5% in all-PSCs.
Area of Science:
- Organic electronics
- Polymer science
- Photovoltaics
Background:
- Bulk-heterojunction all-polymer solar cells (all-PSCs) are promising for renewable energy.
- Developing efficient polymer acceptors is crucial for enhancing all-PSC performance.
Purpose of the Study:
- To synthesize and characterize regio-random (P1) and regio-regular (P2) difluorobenzene-naphthalene-containing polymer acceptors.
- To evaluate the impact of polymer regioregularity on the properties and performance of all-PSCs.
Main Methods:
- Synthesis of P1 and P2 polymers.
- Characterization of polymer thin films (crystallinity, spectral absorptivity, electron mobility).
- Fabrication and testing of all-PSC devices.
Main Results:
- P2 exhibited significantly higher crystallinity in thin films compared to P1.
- P2 demonstrated superior spectral absorptivity and electron mobility.
- All-PSC devices utilizing P2 achieved a power conversion efficiency exceeding 5%.
Conclusions:
- Regioregularity in difluorobenzene-naphthalene-containing polymers significantly enhances crystallinity and charge transport properties.
- The developed P2 polymer is a promising acceptor material for high-performance all-polymer solar cells.
