|
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 |
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