Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3001802
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Funding
- Office of Naval Research [N000140510677]
- U. S. Army Research Office through the Institute for Collaborative Biotechnologies [DAAD19-03-D-0004]
- Department of Defense for Graduate Fellowship Support
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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 C-71 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. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3001802].
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