120th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation for Young Scholars in Polymer Chemistry
Room No. Room 302+303
Time FRI 16:15-:
Code POLY.O-8
Subject Control of the Donor/Acceptor Interfacial Morphology via Quadrupolar Electrostatic Interactions for All-Polymer Solar Cells
Authors HONG IL KIM, Minjun Kim1, Cheol Woong Park, Taiho Park*
Department of Chemical Engineering, Pohang University of Science and Technology, Korea
1Chemical engineering, Pohang University of Science and Technology, Korea
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 (AFM), grazing incidence wide-angle X-ray scattering (GIWAXS), and near-edge X-ray absorption fine-structure spectroscopy (NEXAFS). Unlike a conventional solvent additive, such as 1,8-diiodooctane (DIO), 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.
E-mail hongilkim@postech.ac.kr