INSTRINSIC STABILITY ENHANCEMENT AND IONIC MIGRATION MITIGATION BY FLUORINATED CATIONS INCORPORATION IN HYBRID LEAD HALIDE PEROVSKITES

Fadwa El-Mellouhi (Inventor), Nouar Tabet (Inventor), Fahhud Hussain Alharbi (Inventor), Abdelhak Belaidi (Inventor), Belabbes Merzougui (Inventor), Sergey Rashkeev (Inventor)

Research output: Patent

Abstract

Disclosed is a method of enhancing thermodynamic stability of a hybrid organic inorganic perovskite through a partial fluorination of CH3NH3+ cation. The method identifies that optimal stability of perovskite material can be reached with low controlled concentration of modified fluorinated cations, which has a tendency to stabilize the material due to the strengthening of some initially weak hydrogen bonds between MA+ cations and surrounding lead-iodide framework. Fluorination also reduces significantly the iodine vacancy mediated diffusion in the perovskite under applied bias voltage.

Original languageEnglish
Patent numberUS2019287734
IPCH01L 51/ 00 A I
Priority date13/03/19
Publication statusPublished - 19 Sept 2019

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