Small molecule sensitizers for near-infrared absorption in polymer bulk heterojunction solar cells

J. Peet, A. B. Tamayo, X. D. Dang, J. H. Seo, T. Q. Nguyen

Research output: Contribution to journalArticlepeer-review

101 Scopus citations

Abstract

A low band gap small molecule chromophore has been incorporated into a polymer/fullerene bulk heterojunction (BHJ) solar cell yielding increased carrier generation in the near infrared and increased overall short circuit current. The use of a small concentration of a soluble oligothiophene with a diketopyrrolopyrrole core can extend the absorption and photocurrent of poly(3-hexyl thiophene):[6,6]-phenyl C71 butyric acid methyl ester solar cells to 800 nm. Photocurrent from the dye embedded within the polymer BHJ is demonstrated, and the use of soluble small molecule sensitizers as a path toward high efficiency solar cells is discussed.

Original languageEnglish
Article number163306
JournalApplied Physics Letters
Volume93
Issue number16
DOIs
StatePublished - 2008

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