CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Synthesis, Characterization, and Devices of a Series of Alternating Copolymers for Solar Cells

Lars J. Lindgren (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Fengling Zhang ; Mattias Andersson ; Sophie Barrau ; Stefan Hellström (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Wendimagegn Mammo (Institutionen för kemi- och bioteknik, Polymerteknologi) ; Erik Perzon ; Olle Inganäs ; Mats R. Andersson (Institutionen för kemi- och bioteknik, Polymerteknologi)
Chemistry of Materials (0897-4756). Vol. 21 (2009), 15, p. 3491-3502.
[Artikel, refereegranskad vetenskaplig]

In this study we report the synthesis, characterization, and photovoltaic properties of a series of six conjugated polymers based on donor−acceptor−donor (DAD) structure. The polymers are obtained via Suzuki polymerization of different alkoxy-substituted DAD monomers together with a substituted fluorene or phenylene monomer. Application of polymers as light-harvesting and electron-donating materials in solar cells, in conjunction with both [60]PCBM and [70]PCBM as acceptors, show power-conversion efficiencies (PCEs) up to 2.9%, values obtained without extensive optimization work. Furthermore, atomic force microscopy and field-effect transistor (FET) mobility measurements of acceptor−polymer mixtures show that differences in substitution on the polymers affect morphology, mobility, and device performance. Within the series of polymers, all showing similar optical absorption and redox behavior, substituents play an important role in phase separation on a micrometer scale, which in turn has a large impact on device performance. The phase-separation behavior is clearly seen in [70]PCBM devices where the best-performing devices are obtained using the polymers with short alkoxy groups or no substituents together with a high speed of spin coating during device preparation.

Denna post skapades 2010-01-15. Senast ändrad 2010-08-31.
CPL Pubid: 107988


Läs direkt!

Länk till annan sajt (kan kräva inloggning)

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)



Chalmers infrastruktur