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Effect of the Temperature of Annealing on the Performance of Fluorene and Bithiophene Copolymer in Bilayer Solar Cells

Published online by Cambridge University Press:  30 March 2012

Natasha A. D. Yamamoto ,
Daniel C. Silva ,
Isabel L. Grova ,
Andreia G. Macedo ,
Cleber F. N. Marchiori ,
Marlus Koehler ,
Leni Akcelrud  and
Lucimara S. Roman
Natasha A. D. Yamamoto*
Affiliation:
Laboratório de Dispositivos Nanoestruturados, Departamento de Física, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Daniel C. Silva
Affiliation:
Laboratório de Dispositivos Nanoestruturados, Departamento de Física, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Isabel L. Grova
Affiliation:
Laboratório de Polímeros Paulo Scarpa, Departamento de Química, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Andreia G. Macedo
Affiliation:
Laboratório de Dispositivos Nanoestruturados, Departamento de Física, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Cleber F. N. Marchiori
Affiliation:
Laboratório de Dispositivos Nanoestruturados, Departamento de Física, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Marlus Koehler
Affiliation:
Laboratório de Dispositivos Nanoestruturados, Departamento de Física, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Leni Akcelrud
Affiliation:
Laboratório de Polímeros Paulo Scarpa, Departamento de Química, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
Lucimara S. Roman
Affiliation:
Laboratório de Dispositivos Nanoestruturados, Departamento de Física, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
*
*Corresponding author: Natasha A. D. Yamamoto nady04@fisica.ufpr.br
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Abstract

We have investigated the effect of temperature annealing on bilayer heterojunction solar cells based on poly[9,9’-hexyl-fluorene-alt-bithiophene] as active layer. Film morphology for different temperature annealing was probed by atomic force microscopy (AFM) and the values of roughness range from 0.59 up to 2.15 nm. The best photovoltaic performance was found for devices with active layer annealed at 200°C with power conversion efficiency (η) of 2.8 % while devices without annealing presented only 0.4%. This performance enhancement is attributed to the reduction of traps and increased hole mobility after the thermal annealing.

Keywords

organicphotovoltaicpolymer
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1390: Symposium H/I – Organic Photovoltaics–Materials to Devices , 2012 , mrsf11-1390-h13-65
Copyright
Copyright © Materials Research Society 2012

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References

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