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Introducing paired electric dipole layers for efficient and reproducible perovskite solar cells

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Abstract

Elimination of charge trapping at defects is highly challenging for poly-crystalline organometal halide perovskites. Here, we report a new architecture for reinforcing the built-in electric field (Ein) across the photoactive layer with a pair of strong electric dipole layers (EDLs). The paired EDLs significantly intensify the Ein across the perovskite layer, resulting in suppressed charge trapping of photogenerated charges. As a result, our low-temperature processed P–I–N planar PeSC devices using the paired EDLs exhibit a higher power conversion efficiency (ηmax ∼ 19.4%) and a smaller device-to-device variation with a standard deviation (S.D.) of 0.70%, which far surpass those (ηmax ∼ 17.8%, S.D. ∼ 1.1%) of the devices with typical charge transport layers.

Graphical abstract: Introducing paired electric dipole layers for efficient and reproducible perovskite solar cells

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Publication details

The article was received on 17 Jan 2018, accepted on 04 May 2018 and first published on 07 May 2018


Article type: Communication
DOI: 10.1039/C8EE00162F
Citation: Energy Environ. Sci., 2018, Advance Article
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    Introducing paired electric dipole layers for efficient and reproducible perovskite solar cells

    J. Lee, J. Kim, G. Kim, D. Shin, S. Y. Jeong, J. Lee, S. Hong, J. W. Choi, C. Lee, H. Kim, Y. Yi and K. Lee, Energy Environ. Sci., 2018, Advance Article , DOI: 10.1039/C8EE00162F

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