Molecular Design and Operational Stability: Toward Stable 3D/2D Perovskite Interlayers

Despite organic/inorganic lead halide perovskite solar cells becoming one of the most promising next-generation photovoltaic materials, instability under heat and light soaking remains unsolved. In this work, a highly hydrophobic cation, perfluorobenzylammonium iodide (5FBzAI), is designed and a 2D perovskite with reinforced intermolecular interactions is engineered, providing improved passivation at the interface that reduces charge recombination and enhances cell stability compared with benchmark 2D systems. Motivated by the strong halogen bond interaction, (5FBzAI)(2)PbI(4)used as a capping layer aligns in in-plane crystal orientation, inducing a reproducible increase of approximate to 60 mV in theV(oc), a twofold improvement compared with its analogous monofluorinated phenylethylammonium iodide (PEAI) recently reported. This endows the system with high power conversion efficiency of 21.65% and extended operational stability after 1100 h of continuous illumination, outlining directions for future work.


Published in:
Advanced Science, 2001014
Year:
Aug 16 2020
ISSN:
2198-3844
Keywords:
Note:
This is an open access article under the terms of the Creative Commons Attribution License.
Laboratories:
LCMD
GMF


Note: The status of this file is: Anyone


 Record created 2020-08-30, last modified 2020-10-25

Fulltext:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)