Issue 19, 2011
From the journal:

Journal of Materials Chemistry

n-Doping of thermally polymerizable fullerenes as an electron transporting layer for inverted polymer solar cells†

Namchul Cho,a   Hin-Lap Yip,a   Steven K. Hau,a   Kung-Shih Chen,a   Tae-Wook Kim,a   Joshua A. Davies,a   David F. Zeiglera  and  Alex K.-Y. Jen*a  

* Corresponding authors

a Department of Materials Science and Engineering, University of Washington, Seattle, Washington, USA
E-mail: ajen@u.washington.edu
Fax: +1 206 543 3100
Tel: +1 206 543 2626

Abstract

A novel [6,6]-phenyl-C61-butyric acid methyl styryl ester (PCBM-S) was synthesized and employed as an electron transporting interfacial layer for bulk heterojunction polymer solar cells with an inverted device configuration. After the deposition of PCBM-S film from solution, the styryl groups of PCBM-S were polymerized by post-thermal treatment to form a robust film which is resistive to common organic solvents. This allows the solution processing of upper bulk heterojunction film without eroding the PCBM-S layer. Additionally, the PCBM-S was n-doped with decamethylcobaltocene (DMC) to increase the conductivity of the film, which resulted in a significantly improved power conversion efficiency from 1.24% to 2.33%. The improved device performance is due to the decrease of series resistance and improved electron extraction property of the n-doped PCBM-S film.

Graphical abstract: n-Doping of thermally polymerizable fullerenes as an electron transporting layer for inverted polymer solar cells

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Article information

DOI
https://doi.org/10.1039/C1JM10214A
Article type
Paper
Submitted
14 Jan 2011
Accepted
11 Mar 2011
First published
04 Apr 2011

J. Mater. Chem., 2011,21, 6956-6961

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n-Doping of thermally polymerizable fullerenes as an electron transporting layer for inverted polymer solar cells

N. Cho, H. Yip, S. K. Hau, K. Chen, T. Kim, J. A. Davies, D. F. Zeigler and A. K.-Y. Jen, J. Mater. Chem., 2011, 21, 6956 DOI: 10.1039/C1JM10214A

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