Issue 38, 2015
From the journal:

Nanoscale

Improving the efficiency of polymer solar cells based on furan-flanked diketopyrrolopyrrole copolymer via solvent additive and methanol treatment†

Weilong Zhou,a   Huajie Chen,b   Junjie Lv,a   Youchun Chen,a   Weifeng Zhang,*b   Gui Yu*b  and  Fenghong Li*a  

* Corresponding authors

a State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
E-mail: fhli@jlu.edu.cn

b Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
E-mail: zhangwf@iccas.ac.cn, yugui@iccas.ac.cn

Abstract

We present a furan-flanked DPP copolymer, poly{3,6-difuran-2-yl-2,5-di(2-octyldodecyl)-pyrrolo [3,4-c]pyrrole-1,4-dione-altthienylenevinylene} (PDVF-8), and highlight the improvement in the power conversion efficiency (PCE) of polymer solar cells (PSCs) based on the PDVF-8 as an electron donor via solvent additive and methanol treatment. When 3 vol% 1,8-diiodooctane (DIO) or 1-chloronaphthalene (CN) were used as a solvent additive to the PDVF-8:PC71BM solution in chloroform (CF), the PCE can increase from 0.79% to 3.73% or 4.26%. Methanol treatment (MT) can further enhance the PCE to 4.03% (DIO) and 4.69% (CN). The effect of the solvent additives (DIO and CN) and MT on the phase separation of the PDVF-8:PC71BM thin film has been investigated in detail using atomic force microscopy, transmission electron microscopy (TEM), TEM-energy dispersive spectroscopy and X-ray photoemission spectroscopy depth profiling.

Graphical abstract: Improving the efficiency of polymer solar cells based on furan-flanked diketopyrrolopyrrole copolymer via solvent additive and methanol treatment

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Article information

DOI
https://doi.org/10.1039/C5NR04393J
Article type
Paper
Submitted
01 Jul 2015
Accepted
28 Aug 2015
First published
07 Sep 2015

Nanoscale, 2015,7, 15945-15952

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Improving the efficiency of polymer solar cells based on furan-flanked diketopyrrolopyrrole copolymer via solvent additive and methanol treatment

W. Zhou, H. Chen, J. Lv, Y. Chen, W. Zhang, G. Yu and F. Li, Nanoscale, 2015, 7, 15945 DOI: 10.1039/C5NR04393J

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