Asymmetric tandem organic photovoltaic cells with hybrid planar-mixed molecular heterojunctions

Jiangeng Xue, Soichi Uchida, Barry P. Rand, Stephen R. Forrest

Research output: Contribution to journalArticle

559 Scopus citations

Abstract

We demonstrate high-efficiency organic photovoltaic cells by stacking two hybrid planar-mixed molecular heterojunction cells in series. Absorption of incident light is maximized by locating the subcell tuned to absorb long-wavelength light nearest to the transparent anode, and tuning the second subcell closest to the reflecting metal cathode to preferentially absorb short-wavelength solar energy. Using the donor, copper phthalocyanine, and the acceptor, C 60, we achieve a maximum power conversion efficiency of η P=(5.7±0.3)% under 1 sun simulated AM1.5G solar illumination. An open-circuit voltage of V OC ≤ 1.2 V is obtained, doubling that of a single cell. Analytical models suggest that power conversion efficiencies exceeding 6.5% can be obtained by this architecture.

Original languageEnglish (US)
Pages (from-to)5757-5759
Number of pages3
JournalApplied Physics Letters
Volume85
Issue number23
DOIs
StatePublished - Dec 6 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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