Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Pentafluorobenzene-Based Additive

Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Pentafluorobenzene-Based Additive

We report a pentafluorobenzene-based additive (FPE) to control the donor/acceptor (D/A) interfacial morphology via quadrupolar electrostatic interactions between donor and acceptor polymers in all-polymer solar cells (all-PSCs). The morphology changes are investigated using a combination of atomic f...

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Veröffentlicht in:Chemistry of materials 2017-08, Vol.29 (16), p.6793-6798
Hauptverfasser: Kim, Hong Il, Kim, Minjun, Park, Cheol Woong, Kim, Hae Un, Lee, Han-Koo, Park, Taiho
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container_end_page 6798
container_issue 16
container_start_page 6793
container_title Chemistry of materials
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creator Kim, Hong Il
Kim, Minjun
Park, Cheol Woong
Kim, Hae Un
Lee, Han-Koo
Park, Taiho
description We report a pentafluorobenzene-based additive (FPE) to control the donor/acceptor (D/A) interfacial morphology via quadrupolar electrostatic interactions between donor and acceptor polymers in all-polymer solar cells (all-PSCs). The morphology changes are investigated using a combination of atomic force microscopy, grazing incidence wide-angle X-ray scattering, and near-edge X-ray absorption fine-structure spectroscopy. Unlike a conventional solvent additive, such as 1,8-diiodooctane, a bicontinuous interpenetrating morphology without large-scale phase separation and an enhanced π–π stacking with face-on orientation are found in the FPE processed blended films. These morphology changes improve the charge carrier extraction and charge transport between D/A interfaces to achieve an increase in the photovoltaic performance of all-PSCs.
doi_str_mv 10.1021/acs.chemmater.7b01718
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