Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Pentafluorobenzene-Based Additive
SCIE
SCOPUS
- Title
- Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Pentafluorobenzene-Based Additive
- Authors
- Kim, Hong Il; Kim, Minjun; Park, Cheol Woong; Kim, Hae Un; Lee, Han-Koo; Park, Taiho
- Date Issued
- 2017-08
- Publisher
- AMER CHEMICAL SOC
- 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 (allPSCs). 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 pi-pi 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.
- Keywords
- MOLECULAR-WEIGHT; PERFORMANCE; EFFICIENCY; ACCEPTOR; BLENDS; AGGREGATION; COPOLYMER; DONOR; ORIENTATION; STACKING
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/92051
- DOI
- 10.1021/acs.chemmater.7b01718
- ISSN
- 0897-4756
- Article Type
- Article
- Citation
- CHEMISTRY OF MATERIALS, vol. 29, no. 16, page. 6793 - 6798, 2017-08
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