Reduced initial degradation of bulk heterojunction organic solar cells by incorporation of stacked fullerene and lithium fluoride interlayers

Kenji Kawano, Chihaya Adachi

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49 Citations (Scopus)

Abstract

Reduced initial degradation of bulk heterojunction organic solar cells (OSCs) was achieved by inclusion of stacked fullerene (C60) and lithium fluoride interlayers. By inserting a 3 nm C60 layer and a 0.5 nm LiF layer between the photoactive layer and Al cathode in an OSC, the device lifetime calculated after an initial 8 h continuous illumination period was dramatically improved, with a decrease of only 5% in the power conversion efficiency. The 3 nm C60 layer forms a unique surface pattern of microscopic domes, and the combination of this layer with a 0.5 nm LiF layer formed an Ohmic-like contact between the photoactive layer and the Al cathode, resulting in a significant reduction in the degradation of the OSC.

Original languageEnglish
Article number053307
JournalApplied Physics Letters
Volume96
Issue number5
DOIs
Publication statusPublished - Feb 17 2010

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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