Asymmetric A-D-pi-A-type nonfullerene small molecule acceptors for efficient organic solar cells
- Authors
- Li, Xueshan; Li, Chao; Ye, Linglong; Weng, Kangkang; Fu, Huiting; Ryu, Hwa Sook; Wei, Donghui; Sun, Xiaobo; Woo, Han Young; Sun, Yanming
- Issue Date
- 7-9월-2019
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.33, pp.19348 - 19354
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 7
- Number
- 33
- Start Page
- 19348
- End Page
- 19354
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/62895
- DOI
- 10.1039/c9ta06476a
- ISSN
- 2050-7488
- Abstract
- There has been significant progress with regard to research on nonfullerene small molecule acceptors (SMAs) during the past several years. Typically, high-performance nonfullerene SMAs are based on symmetric A-D-A or A-pi-D-pi-A structural frameworks. In this study, a novel asymmetric nonfullerene SMA, TTPT-T-2F, with an A-D-pi-A structure is rationally designed and synthesized. In addition, a symmetric A-D-A-type nonfullerene SMA, IT-2F, and a symmetric A-pi-D-pi-A-type nonfullerene SMA, T-TPT-T-2F, are also synthesized for comparison. When PBT1-C is employed as a polymer donor, a promising power conversion efficiency (PCE) of 12.71% is achieved for TTPT-T-2F-based organic solar cells (OSCs), which surpasses those of devices based on IT-2F (PCE = 10.54%) and T-TPT-T-2F (PCE = 10.71%). Favorable phase separation toward efficient and more balanced charge transport accounts for the higher PCE achieved in the PBT1-C:TTPT-T-2F device. Our results demonstrate that a small molecule acceptor with an A-D-pi-A structural framework is a promising class of nonfullerene acceptors for OSCs.
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