Journal
ADVANCED MATERIALS
Volume 28, Issue 42, Pages 9423-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201602776
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Funding
- National Basic Research Program 973 [2014CB643501]
- NSFC [91333204, 21325419]
- Chinese Academy of Sciences [XDB12030200]
- CAS-Croucher [CAS14601]
- ONR [N00141512322]
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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.
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