Over 16% efficiency all-polymer solar cells by sequential deposition
- Authors
- Li, Bangbang; Zhang, Xuanyu; Wu, Ziang; Yang, Jie; Liu, Bin; Liao, Qiaogan; Wang, Junwei; Feng, Kui; Chen, Rui; Woo, Han Young; Ye, Fei; Niu, Li; Guo, Xugang; Sun, Huiliang
- Issue Date
- 6월-2022
- Publisher
- SCIENCE PRESS
- Keywords
- all-polymer solar cells; polymer acceptors; planar heterojunction; sequential deposition
- Citation
- SCIENCE CHINA-CHEMISTRY, v.65, no.6, pp.1157 - 1163
- Indexed
- SCIE
SCOPUS
- Journal Title
- SCIENCE CHINA-CHEMISTRY
- Volume
- 65
- Number
- 6
- Start Page
- 1157
- End Page
- 1163
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/142242
- DOI
- 10.1007/s11426-022-1247-1
- ISSN
- 1674-7291
- Abstract
- All-polymer solar cells (all-PSCs) have received extensive attention due to their excellent mechanical robustness and performance stability. However, the power conversion efficiency (PCE) of all-PSCs still lags behind those of organic solar cells (OSCs) based on non-fullerene small molecule acceptors. Herein, we report highly efficient all-PSCs via sequential deposition (SD) with donor and acceptor layers coated sequentially to optimize the film microstructure. Compared with the bulk heterojunction (BHJ) all-PSCs, an optimized morphology with vertical component distribution was achieved for the SD-processed all-PSCs due to the synergistic effect of swelling of polymer films and using additive. Such strategy involves using chlorobenzene as the first layer processing-solvent for polymer donor, chloroform as the second processing-solvent for polymer acceptor with trace 1-chlor-onaphthalene, efficiently promoting exciton dissociation and charge extraction and reducing trap-assisted recombination. Consequently, over 16% all-PSCs fabricated via SD method was realized for the first time, which is much higher than that (15.2%) of its BHJ counterpart and also among the highest PCEs in all-PSCs. We have further demonstrated the generality of this approach in various all-polymer systems. This work indicates that the SD method can yield excellent all-PSCs and provides a facile approach to fabricating high-performance all-PSCs.
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