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 language | English |
---|---|
Patent number | US2019287734 |
IPC | H01L 51/ 00 A I |
Priority date | 13/03/19 |
Publication status | Published - 19 Sept 2019 |