Journal
ADVANCED MATERIALS
Volume 25, Issue 6, Pages 825-831Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201203827
Keywords
selenium; low-bandgap polymer; tandem solar cell; visibly-transparent solar cell
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Funding
- Air Force Office of Scientific Research (AFOSR) [FA9550-09-1-0610]
- Office of Naval Research (ONR) [N00014-04-1-0434]
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A reduction of the bandgap and an enhancement of the charge transport properties of a LBG polymer (PBDTT-DPP) can be achieved simultaneously by changing the sulfur atoms on the DPP unit to selenium atoms. The newly designed polymer, PBDTT-SeDPP (Eg = 1.38 eV), shows excellent photovoltaic performance in single junction devices with power conversion efficiencies (PCEs) over 7% and photo-response up to 900 nm. A tandem polymer solar cell and a visibly transparent solar cell based on PBDTT-SeDPP show 9.5% and 4.5% PCEs, which are superior to those based on PBDTT-DPP.
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