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Issue 30, 2009
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Highly efficient organic solar cells based on a poly(2,7-carbazole) derivative

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Abstract

We have studied the utilization of PCDTBT, an alternating poly(2,7-carbazole) derivative, in organic bulk heterojunction solar cells. The effect of polymer molecular weight, PCDTBT:[60]PCBM ratio, and active layer thickness on the device performance is reported. The best performance was obtained when the number-average molecular weights (Mn) are around 20 kDa with a polydispersity index around 2.2. Both PCDTBT:[60]PCBM ratio and active layer thickness affect the light absorption and the charge transport properties. By optimizing these two parameters, power conversion efficiency (PCE) up to 4.35% was reached under calibrated AM1.5G illumination of 100 mW cm−2. When blended with [70]PCBM, PCDTBT exhibited a PCE up to 4.6%.

Graphical abstract: Highly efficient organic solar cells based on a poly(2,7-carbazole) derivative

  • This article is part of the themed collection: Solar cells
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Article information


Submitted
21 Jan 2009
Accepted
27 Mar 2009
First published
06 May 2009

J. Mater. Chem., 2009,19, 5351-5358
Article type
Paper

Highly efficient organic solar cells based on a poly(2,7-carbazole) derivative

S. Wakim, S. Beaupré, N. Blouin, B. Aich, S. Rodman, R. Gaudiana, Y. Tao and M. Leclerc, J. Mater. Chem., 2009, 19, 5351
DOI: 10.1039/B901302D

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