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Morphological Control of Donor/Acceptor Interfaces in All-Polymer Sola…

Year of publication
Title of paper
Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Novel Pentafluorobenzene-Based Additive
Author
[박태호교수 연구실]
Publication in journal
Chemical of Materials 2017, 29 (16), pp 6793–6798
Publication date
20170725
 
[abstract]
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 ππ 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: 10.1021/acs.chemmater.7b01718