Influence of a polyelectrolyte based-fluorene interfacial layer on the performance of a polymer solar cell

Literature Information

Publication Date 2013-08-15
DOI 10.1039/C3TA11972F
Impact Factor 12.732
Authors

Shiyu Yao, Pengfei Li, Ji Bian, Qingfeng Dong, Chan Im, Wenjing Tian


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Abstract

A new quaternized ammonium polyfluorene polyelectrolyte poly[3,3′-(2-(3-hexyl-5-(7-(4-hexyl-5-methylthiophen-2-yl)benzo[c][1,2,5]thiadiazol-4-yl)thiophen-2-yl)-7-methyl-9H-fluorene-9,9-diyl)bis(N,N-dimethylpropan-1-amine)]dibromide (PFBTBr) is applied as the cathode interfacial layer of a polymer solar cell based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PC61BM). Electrostatic force microscopy (EFM) measurements of PFBTBr layers demonstrate the formation of the interfacial dipole between the active layer and the cathode by inserting a PFBTBr interfacial layer. Atomic force microscopy (AFM) measurements of PFBTBr layers with varied concentrations show that the morphology of the PFBTBr layer plays a direct, important role in the contact quality between the active layer and the PFBTBr interfacial layer, which can strongly affect the performance of devices. X-ray photoelectron spectroscopy measurements (XPS) indicate that PFBTBr may serve as a protective agent for the active layer against Al-induced degradation, since it prevents hot aluminum atoms from diffusing into the active layer. The power conversion efficiency (PCE) of the PSCs with the PFBTBr layer reaches 3.9% under the illumination of AM 1.5G, 100 mW cm−2, which is 1.6 times higher in comparison with that (2.4%) of the device without the PFBTBr layer. The significant increase in efficiency and easy utilization indicate that this interfacial material has promising and practical application prospects.

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Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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