Energy‐Level Modulation of Small‐Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar Cells
Top Cited Papers
- 8 September 2016
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 28 (42), 9423-9429
- https://doi.org/10.1002/adma.201602776
Abstract
Fine energy-level modulations of small-molecule acceptors (SMAs) are realized via subtle chemical modifications on strong electron-withdrawing end-groups. The two new SMAs (IT-M and IT-DM) end-capped by methyl-modified dicycanovinylindan-1-one exhibit upshifted lowest unoccupied molecular orbital (LUMO) levels, and hence higher open-circuit voltages can be observed in the corresponding devices. Finally, a top power conversion efficiency of 12.05% is achieved.Keywords
Funding Information
- National Natural Science Foundation of China (91333204, 21325419)
- Chinese Academy of Sciences (XDB12030200)
- Office of Naval Research (N00141512322)
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