Journal
JOULE
Volume 3, Issue 1, Pages 227-239Publisher
CELL PRESS
DOI: 10.1016/j.joule.2018.10.024
Keywords
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Funding
- NSFC [21504095, 51373181]
- Chinese Academy of Science [XDB12030200, KJZD-EW-J01]
- US Office of Naval Research (grant ONR) [N000141712204]
- National Science Foundation [DGE-1633587]
- Office of Science, Office of Basic Energy Sciences, of the US Department of Energy [DE-AC02-05CH11231]
- U.S. Department of Defense (DOD) [N000141712204] Funding Source: U.S. Department of Defense (DOD)
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Currently, most cathode interlayer (CIL) materials for organic solar cells (OSCs) cannot be processed by printing techniques, which severely limits their use in practical productions. Herein, we report a naphthalene diimide (NDI)-based small-molecular compound (N,N-dimethylamino) propyl naphthalene diimide (NDI-N) as printable CIL for OSCs. NDI-N exhibits a unique advantage that combines the merits of high crystallinity and good film-forming property in one material, endowing the semiconductor with excellent electron-transport properties and good processability. By using the NDI-N as CIL, a high power-conversion efficiency (PCE) of 13.9% was achieved in a PBDB-T-2F:IT-4F-based OSC device. More importantly, a large-area OSC device of 1 cm(2) was fabricated by using the blade-coated NDI-N CIL and an outstanding PCE of 13.2% was achieved, which represents the highest efficiency of large-area OSCs. The results in this work may pave the way for low-cost and mass production of OSCs.
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