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Scalable Synthesis of Micron Size Crystals of CH 3 NH 3 PbI 3 at Room Temperature in Acetonitrile via Rapid Reactive Crystallization
Author(s) -
Berhe Taame A.,
Su WeiNien,
Cheng JuHsiang,
Lin MingHsien,
Ibrahim Kassa B.,
Kahsay Amaha W.,
Lin Li Chia,
Tripathi Alok M.,
Tang MauTsu,
Hwang BingJoe
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201904025
Subject(s) - crystallization , materials science , stoichiometry , ostwald ripening , crystallite , annealing (glass) , acetonitrile , iodide , transmission electron microscopy , analytical chemistry (journal) , crystallography , chemical engineering , chemistry , inorganic chemistry , nanotechnology , organic chemistry , engineering , composite material
From application point of view, scalable, facile and rapid synthesis method for mass production of a homogeneous and phase pure CH 3 NH 3 PbI 3 micron size crystal at the industry level is still highly required, although it has been claimed that the CH 3 NH 3 PbI 3 crystals can be prepared by solution‐annealing the precursors at elevated temperature or prolonged reaction time. Herein, polycrystalline CH 3 NH 3 PbI 3 micron size crystals can be prepared by reactive crystallization of PbI 2 and CH 3 NH 3 I in a stoichiometric ratio at room temperature. TXM (Transmission X‐ray Microscopy), optical microscope, TEM and TEM‐EDX analysis were used to confirm the nature of the CH 3 NH 3 PbI 3 product. Moreover, Ostwald ripening of iodide ion into PbI 2 is proposed as the key step to form 3D PbI 3 − , followed by the intercalation of CH 3 NH 3 + for this reactive crystallization. Interestingly, this result suggests that industry level mass production of micron CH 3 NH 3 PbI 3 crystals is possible with this novel synthesis method.