Chalcogenophene comonomer comparison in small band gap diketopyrrolopyrrole-based conjugated polymers for high-performing field-effect transistors and organic solar cells
Type
ArticleAuthors
Ashraf, Raja ShahidMeager, Iain
Nikolka, Mark

Kirkus, Mindaugas

Planells, Miquel
Schroeder, Bob C.

Holliday, Sarah
Hurhangee, Michael
Nielsen, Christian Bergenstof
Sirringhaus, Henning
McCulloch, Iain

KAUST Department
Chemical Science ProgramKAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
Date
2015-01-14Online Publication Date
2015-01-14Print Publication Date
2015-01-28Permanent link to this record
http://hdl.handle.net/10754/564023
Metadata
Show full item recordAbstract
The design, synthesis, and characterization of a series of diketopyrrolopyrrole-based copolymers with different chalcogenophene comonomers (thiophene, selenophene, and tellurophene) for use in field-effect transistors and organic photovoltaic devices are reported. The effect of the heteroatom substitution on the optical, electrochemical, and photovoltaic properties and charge carrier mobilities of these polymers is discussed. The results indicate that by increasing the size of the chalcogen atom (S < Se < Te), polymer band gaps are narrowed mainly due to LUMO energy level stabilization. In addition, the larger heteroatomic size also increases intermolecular heteroatom-heteroatom interactions facilitating the formation of polymer aggregates leading to enhanced field-effect mobilities of 1.6 cm2/(V s). Bulk heterojunction solar cells based on the chalcogenophene polymer series blended with fullerene derivatives show good photovoltaic properties, with power conversion efficiencies ranging from 7.1-8.8%. A high photoresponse in the near-infrared (NIR) region with excellent photocurrents above 20 mA cm-2 was achieved for all polymers, making these highly efficient low band gap polymers promising candidates for use in tandem solar cells. (Graph Presented).Citation
Ashraf, R. S., Meager, I., Nikolka, M., Kirkus, M., Planells, M., Schroeder, B. C., … McCulloch, I. (2015). Chalcogenophene Comonomer Comparison in Small Band Gap Diketopyrrolopyrrole-Based Conjugated Polymers for High-Performing Field-Effect Transistors and Organic Solar Cells. Journal of the American Chemical Society, 137(3), 1314–1321. doi:10.1021/ja511984qSponsors
This work was carried out primarily with funding and supports from the X10D Project (EC 287818) and The Leventis Foundation with support from EPSRC (EP/G037515/1 and EP/L016702/1). M.K. acknowledges support from Nano-matcell Project (EU 308997), and M.P. acknowledges support from the Artesun Project (EU 604397).Publisher
American Chemical Society (ACS)ae974a485f413a2113503eed53cd6c53
10.1021/ja511984q