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Enhancement of the power conversion efficiency for inverted polymer solar cells due to an embedded CuxO interlayer formed by using Cu(I) acetate and Cu(II) acetate

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Abstract

Structural, optical, and photovoltaic properties of copper-oxide (CuxO) thin films formed by using a sol–gel method were investigated. X-ray diffraction patterns showed that the CuxO films prepared utilizing Cu(I) acetate or Cu(II) acetate and annealed under ambient atmosphere at various temperatures were polycrystalline with two phases, Cu2O and Cu64O. Transmittance spectra showed that the energy band gaps of the CuxO thin films formed by using Cu(II) acetate were smaller than those formed by using Cu(I) acetate. Current–voltage results showed that the power conversion efficiencies of the inverted polymer solar cells utilizing the CuxO interlayer formed by using Cu(II) acetate were better than those utilizing the CuxO interlayer formed by using Cu(I) acetate due to the multiple band gaps of the Cu(II) acetate.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0025491).

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Authors and Affiliations

  1. Department of Electronic Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 133-791, Republic of Korea

    Sehan Lee, Dae Hun Kim & Tae Whan Kim

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  1. Sehan Lee
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  2. Dae Hun Kim
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  3. Tae Whan Kim
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Correspondence to Tae Whan Kim.

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Lee, S., Kim, D.H. & Kim, T.W. Enhancement of the power conversion efficiency for inverted polymer solar cells due to an embedded CuxO interlayer formed by using Cu(I) acetate and Cu(II) acetate. J Sol-Gel Sci Technol 67, 105–111 (2013). https://doi.org/10.1007/s10971-013-3055-0

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