Morphology Control Enables Efficient Ternary Organic Solar Cells
- Authors
- Xie, Yuanpeng; Yang, Fan; Li, Yuxiang; Uddin, Mohammad Afsar; Bi, Pengqing; Fan, Bingbing; Cai, Yunhao; Hao, Xiaotao; Woo, Han Young; Li, Weiwei; Liu, Feng; Sun, Yanming
- Issue Date
- 20-9월-2018
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- ICBA; morphology; nonfullerene acceptor; organic solar cells; ternary structure
- Citation
- ADVANCED MATERIALS, v.30, no.38
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED MATERIALS
- Volume
- 30
- Number
- 38
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/73075
- DOI
- 10.1002/adma.201803045
- ISSN
- 0935-9648
- Abstract
- Ternary organic solar cells are promising alternatives to the binary counterpart due to their potential in achieving high performance. Although a growing number of ternary organic solar cells are recently reported, less effort is devoted to morphology control. Here, ternary organic solar cells are fabricated using a wide-bandgap polymer PBT1-C as the donor, a crystalline fused-ring electron acceptor ITIC-2Cl, and an amorphous fullerene derivative indene-C-60 bisadduct (ICBA) as the acceptor. It is found that ICBA can disturb pi-pi interactions of the crystalline ITIC-2Cl molecules in ternary blends and then help to form more uniform morphology. As a result, incorporation of 20% ICBA in the PBT1-C:ITIC-2Cl blend enables efficient charge dissociation, negligible bimolecular recombination, and balanced charge carrier mobilities. An impressive power conversion efficiency (PCE) of 13.4%, with a high fill factor (FF) of 76.8%, is eventually achieved, which represents one of the highest PCEs reported so far for organic solar cells. The results manifest that the adoption of amorphous fullerene acceptor is an effective approach to optimizing the ternary blend morphology and thereby increases the solar cell performance.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.