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A potential perylene diimide dimer-based acceptor material for highly efficient solution-processed non-fullerene
Xin Zhang1, Zhenhuan Lu, Long Ye
1Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.
Advanced Materials (Deerfield Beach, Fla.)
|August 9, 2013
Summary
New perylene diimide (PDI) dimers significantly reduce aggregation in organic solar cells (OSCs). This novel acceptor material achieves power conversion efficiencies (PCEs) 300 times higher than monomeric PDI, demonstrating potential for efficient non-fullerene OSCs.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- Organic solar cells (OSCs) are a promising renewable energy technology.
- Efficient acceptor materials are crucial for high-performance OSCs.
- Aggregation of acceptor materials like perylene diimide (PDI) can limit device efficiency.
Purpose of the Study:
- To develop a novel acceptor material for OSCs with reduced aggregation.
- To investigate the performance of dimeric PDI compared to monomeric PDI in OSCs.
Main Methods:
- Synthesis of perylene diimide (PDI) dimers.
- Fabrication of OSCs using dimeric PDI as the acceptor material.
- Characterization of material properties and device performance, including power conversion efficiency (PCE).
Main Results:
- Dimeric PDI exhibited significantly reduced aggregation compared to monomeric PDI.
- OSCs utilizing dimeric PDI achieved a best PCE approximately 300 times higher than those with monomeric PDI.
- The optimized blend involved the conjugate polymer BDTTTT-C-T and 5% 1,8-diiodooctane as a co-solvent.
Conclusions:
- Perylene diimide (PDI) dimers represent a highly efficient acceptor material for organic solar cells (OSCs).
- Reduced aggregation in dimeric PDI is key to achieving significantly enhanced power conversion efficiencies (PCEs).
- Non-fullerene materials, such as PDI dimers, show great promise for the future of efficient organic solar cells.
