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Excellent Long-Term Stability of Power Conversion Efficiency in NonFullerene-Based Polymer Solar Cells Bearing Tricyanovinylene-Functionalized n-Type Small Molecules
- Authors
- Ko, Eun Yi; Park, Gi Eun; Lee, Ji Hyung; Kim, Hyung Jong; Lee, Dae Hee; Ahn, Hyungju; Uddin, Mohammad Afsar; Woo, Han Young; Cho, Min Ju; Choi, Dong Hoon
- Issue Date
- 15-3월-2017
- Publisher
- AMER CHEMICAL SOC
- Keywords
- tricyanovinylene; n-type small molecules; non-fullerene solar cell; bulk heterojunction organic solar cell; stability
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.9, no.10, pp.8838 - 8847
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 9
- Number
- 10
- Start Page
- 8838
- End Page
- 8847
- ISSN
- 1944-8244
- Abstract
- New small molecules having modified acceptor strength and pi-conjugation length and containing dicyanovinylene (DCV) and tricyanovinylene (TCV) as a strongly electron-accepting unit with indacenodithiophene, IDT(DCV)(2), IDT(TCV)(2), and IDTT(TCV)(2), were synthesized and studied in terms of their applicability to polymer solar cells with PTB7-Th as an electron-donating polymer. Intriguingly, the blended films containing IDT(TCV)(2) and IDTT(TCV)(2) exhibited superior shelf life stabilities of more than 1000 h without any reduction in the initial power conversion efficiency. The low-lying lowest unoccupied molecular orbital energy levels and robust internal morphologies of small TCV-containing molecules could afford excellent shelf life stability.
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