Issue 7, 2018

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

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

Supplementary files

Article information

Article type
Communication
Submitted
17 Jan 2018
Accepted
04 May 2018
First published
07 May 2018

Energy Environ. Sci., 2018,11, 1742-1751

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, 11, 1742 DOI: 10.1039/C8EE00162F

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