Jump to main content
Jump to site search


A novel quadruple-cation absorber for universal hysteresis elimination for high efficiency and stable perovskite solar cells

Author affiliations

Abstract

Organic–inorganic metal halide perovskite solar cells (PSCs) have made a striking breakthrough with a power conversion efficiency (PCE) over 22%. However, before moving to commercialization, the hysteresis of PSCs, characterized as an inconsistent photovoltaic conversion property at varied electric fields, should be eliminated for stable performance. Herein, we present a novel quadruple-cation perovskite absorber, KxCs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3 (labeled as KCsFAMA), with which the hysteresis in PSCs can be fully eliminated irrespective of the electron transportation layers. The incorporation of potassium intensively promotes the crystallization of the perovskite film with a grain size up to ∼1 μm, doubled compared to the K free counterparts. Further characterization revealed that a lower interface defect density, longer carrier lifetime and fast charge transportation have all made contributions to the hysteresis-free, stable and high PCE (20.56%) of the KCsFAMA devices. Moreover, we present a 6 × 6 cm2 sub-module with the KCsFAMA composition achieving a high efficiency of 15.76% without hysteresis. This result suggests that the quadruple-cation perovskite is a highly attractive candidate for future developments of efficient and stable PSC modules.

Graphical abstract: A novel quadruple-cation absorber for universal hysteresis elimination for high efficiency and stable perovskite solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Sep 2017, accepted on 26 Oct 2017 and first published on 26 Oct 2017


Article type: Communication
DOI: 10.1039/C7EE02634J
Citation: Energy Environ. Sci., 2017, Advance Article
  •   Request permissions

    A novel quadruple-cation absorber for universal hysteresis elimination for high efficiency and stable perovskite solar cells

    T. Bu, X. Liu, Y. Zhou, J. Yi, X. Huang, L. Luo, J. Xiao, Z. Ku, Y. Peng, F. Huang, Y. Cheng and J. Zhong, Energy Environ. Sci., 2017, Advance Article , DOI: 10.1039/C7EE02634J

Search articles by author

Spotlight

Advertisements