Tandem polymer solar cells featuring a spectrally matched low-bandgap polymer

Letian Dou, Jingbi You, Jun Yang, Chun Chao Chen, Youjun He, Seiichiro Murase, Tom Moriarty, Keith Emery, Gang Li, Yang Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1336 Citations (Scopus)

Abstract

Tandem solar cells provide an effective way to harvest a broader spectrum of solar radiation by combining two or more solar cells with different absorption bands. However, for polymer solar cells, the performance of tandem devices lags behind single-layer solar cells mainly due to the lack of a suitable low-bandgap polymer. Here, we demonstrate highly efficient single and tandem polymer solar cells featuring a low-bandgap conjugated polymer (PBDTT-DPP: bandgap, ∼1.44 eV). A single-layer device based on the polymer provides a power conversion efficiency of ∼6%. When the polymer is applied to tandem solar cells, a power conversion efficiency of 8.62% is achieved, which is, to the best of our knowledge, the highest certified efficiency for a polymer solar cell to date.
Original languageEnglish
Pages (from-to)180-185
Number of pages6
JournalNature Photonics
Volume6
Issue number3
DOIs
Publication statusPublished - 1 Mar 2012
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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