Improving the efficiency of polymer solar cells based on furan-flanked diketopyrrolopyrrole copolymer via solvent additive and methanol treatment. Issue 38 (14th September 2015)

• Record Type: Journal Article
• Authors: Zhou, Weilong; Chen, Huajie; Lv, Junjie; Chen, Youchun; Zhang, Weifeng; Yu, Gui; Li, Fenghong
• Is Part Of: Nanoscale. Volume 7:Issue 38(2015)
• Page Start: 15945
• Page End: 15952
• Publication Date: 2015-09-14
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr04393j
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : We present a furan-flanked DPP copolymer, PDVF-8, and highlight the improvement in the PCE of PSCs based on the PDVF-8 as an electron donor via solvent additive and methanol treatment. 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:PC71 BM 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:PC71 BM 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.