Homochiral Asymmetric-Shaped Electron-Transporting Materials for Efficient Non-Fullerene Perovskite Solar Cells
- Authors
- Jung, Su-Kyo; Heo, Jin Hyuck; Lee, Dae Woon; Lee, Seung-Heon; Lee, Seung-Chul; Yoon, Woojin; Yun, Hoseop; Kim, Dongwook; Kim, Jong H.; Im, Sang Hyuk; Kwon, O-Pil
- Issue Date
- 10-1월-2019
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- electron transport; energy conversion; perovskites; solar cells
- Citation
- CHEMSUSCHEM, v.12, no.1, pp.224 - 230
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMSUSCHEM
- Volume
- 12
- Number
- 1
- Start Page
- 224
- End Page
- 230
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/68310
- DOI
- 10.1002/cssc.201802234
- ISSN
- 1864-5631
- Abstract
- A design strategy is proposed for electron-transporting materials (ETMs) with homochiral asymmetric-shaped groups for highly efficient non-fullerene perovskite solar cells (PSCs). The electron transporting N,N '-bis[(R)-1-phenylethyl]naphthalene-1,4,5,8-tetracarboxylic diimide (NDI-PhE) consists of two asymmetric-shaped chiral (R)-1-phenylethyl (PhE) groups that act as solubilizing groups by reducing molecular symmetry and increasing the free volume. NDI-PhE exhibits excellent film-forming ability with high solubility in various organic solvents [about two times higher solubility than the widely used fullerene-based phenyl-C-61-butyric acid methyl ester (PCBM) in o-dichlorobenzene]. NDI-PhE ETM-based inverted PSCs exhibit very high power conversion efficiencies (PCE) of up to 20.5 % with an average PCE of 18.74 +/- 0.95 %, which are higher than those of PCBM ETM-based PSCs. The high PCE of NDI-PhE ETM-based PSCs may be attributed to good film-forming abilities and to three-dimensional isotropic electron transporting capabilities. Therefore, introducing homochiral asymmetric-shaped groups onto charge-transporting materials is a good strategy for achieving high device performance.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.