Absorption Enhancement in Thin Organic Solar Cells With MoO3/Ag/MoO3 Transparent Anode Based on Short-Pitched Metallic Grating

The multilayer film consisting of MoO 3 /Ag/MoO 3 (shortened as MAM) is very promising as an alternative of indium-tin oxide (ITO) to work as the transparent anode in organic solar cells (OSCs). In MAM-based thin OSCs, the absorption of light is quite poor. Here, we propose to apply a short-pitched...

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Bibliographic Details
Published inIEEE photonics journal Vol. 9; no. 2; pp. 1 - 7
Main Authors Zhang, Ye, Cui, Yanxia, Ji, Ting, Hao, Yuying, Zhu, Furong
Format Journal Article
LanguageEnglish
Published IEEE 01.04.2017
Subjects
Absorption
Anodes
Cathodes
Gratings
Indium tin oxide
Organic materials
plasmonics
Plasmons
subwavelength structures
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Summary:The multilayer film consisting of MoO 3 /Ag/MoO 3 (shortened as MAM) is very promising as an alternative of indium-tin oxide (ITO) to work as the transparent anode in organic solar cells (OSCs). In MAM-based thin OSCs, the absorption of light is quite poor. Here, we propose to apply a short-pitched metallic grating into the MAM-based OSC for improving the absorption in its thin active layer. Numerical calculations reveal that the obtained enhancement of integrated absorption in the active layer is more than 500% with respect to the equivalent planar control. The field distributions at the two peaks of the normalized absorption spectrum indicate that propagating surface plasmon polaritons (SPPs), as well as the horizontal metal-insulator-metal (MIM) waveguide mode, play the main role of trapping light into the active material. It is expected that the proposal could contribute to the development of the efficient ITO free thin OSCs.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2017.2677579