Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Tuesday 6th February 2018 from 11.00am to 11.15am (GMT).

During this time our website performance may be temporarily affected. If you have any questions please use the feedback button available under our menu button. We apologise for any inconvenience this might cause and thank you for your patience.



Post-healing of defects: an alternative way for passivation of carbon-based mesoscopic perovskite solar cells via hydrophobic ligand coordination

Author affiliations

Abstract

The passivation of defects at perovskite grain boundaries (GB) is crucial in achieving highly efficient and stable perovskite solar cells. Unlike the widely used additive passivation method where a mixture of additives and perovskite precursor is used for preparing perovskite films, we herein developed a new defect post-healing method via dip-coating trioctylphosphine oxide (TOPO) ligands on pre-fabricated carbon-based mesoscopic perovskite solar cells (MPSCs). Since perovskites have formed before post-healing, TOPO ligands are selectively adsorbed onto the exposed perovskite surface and hence have little influence on charge extraction of interfaces. The defects are post-healed via O atoms in P[double bond, length as m-dash]O bonds coordinated to halide-deficient sites, leading to an enhancement of the power conversion efficiency (PCE) from 11.0% to 12.8%. Moreover, due to the three hydrophobic long chain alkyls in TOPO, the humidity stability of the device has also been improved simultaneously.

Graphical abstract: Post-healing of defects: an alternative way for passivation of carbon-based mesoscopic perovskite solar cells via hydrophobic ligand coordination

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Nov 2017, accepted on 05 Jan 2018 and first published on 08 Jan 2018


Article type: Communication
DOI: 10.1039/C7TA09646A
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

    Post-healing of defects: an alternative way for passivation of carbon-based mesoscopic perovskite solar cells via hydrophobic ligand coordination

    G. Huang, C. Wang, H. Zhang, S. Xu, Q. Xu and Y. Cui, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C7TA09646A

Search articles by author

Spotlight

Advertisements