Planar Conjugated Polymers Containing 9,10-Disubstituted Phenanthrene Units for Efficient Polymer Solar Cells

Four novel conjugated polymers (P1‐4) with 9,10‐disubstituted phenanthrene (PhA) as the donor unit and 5,6‐bis(octyloxy)benzothiadiazole as the acceptor unit are synthesized and characterized. These polymers are of medium bandgaps (2.0 eV), low‐lying HOMO energy levels (below −5.3 eV), and high hole...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2014-06, Vol.35 (12), p.1142-1147
Main Authors: Li, Guangwu, Kang, Chong, Li, Cuihong, Lu, Zhen, Zhang, Jicheng, Gong, Xue, Zhao, Guangyao, Dong, Huanli, Hu, Wenping, Bo, Zhishan
Format: Article
Language:English
Subjects:
Applied sciences
Blends
conjugated polymers
Derivatives
Donor materials
Electric Power Supplies
Electrochemical Techniques
Energy
Energy Transfer
Exact sciences and technology
Molecular Structure
Natural energy
Optical Phenomena
Organic polymers
Particle Size
Phenanthrene
Phenanthrenes - chemistry
Photochemical Processes
Photovoltaic cells
Photovoltaic conversion
Physicochemistry of polymers
Polymer blends
polymer solar cells
Polymers
Polymers - chemical synthesis
Polymers - chemistry
Polymers with particular properties
Porosity
Preparation, kinetics, thermodynamics, mechanism and catalysts
Solar cells
Solar cells. Photoelectrochemical cells
Solar Energy
Surface Properties
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Summary:Four novel conjugated polymers (P1‐4) with 9,10‐disubstituted phenanthrene (PhA) as the donor unit and 5,6‐bis(octyloxy)benzothiadiazole as the acceptor unit are synthesized and characterized. These polymers are of medium bandgaps (2.0 eV), low‐lying HOMO energy levels (below −5.3 eV), and high hole mobilities (in the range of 3.6 × 10−3 to 0.02 cm2 V−1 s−1). Bulk heterojunction (BHJ) polymer solar cells (PSCs) with P1‐4:PC71BM blends as the active layer and an alcohol‐soluble fullerene derivative (FN‐C60) as the interfacial layer between the active layer and cathode give the best power conversion efficiency (PCE) of 4.24%, indicating that 9,10‐disubstituted PhA are potential donor materials for high‐efficiency BHJ PSCs. Novel planar D–A alternating conjugated polymers (P1‐4) with 9,10‐disubstituted phenanthrene as the donor unit and 5,6‐bis(octyloxy)benzothiadiazole as the acceptor unit are synthesized and used as donor materials for BHJ PSCs. The best PCE of 4.24% is achieved for the blends of P1‐4 and PC71BM.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.201400044