Scalable Synthesis of Micron Size Crystals of CHNHPbI at Room Temperature in Acetonitrile via Rapid Reactive Crystallization
ChemistrySelect, ISSN: 2365-6549, Vol: 5, Issue: 11, Page: 3266-3271
2020
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- 6Captures
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Article Description
From application point of view, scalable, facile and rapid synthesis method for mass production of a homogeneous and phase pure CHNHPbI micron size crystal at the industry level is still highly required, although it has been claimed that the CHNHPbI crystals can be prepared by solution-annealing the precursors at elevated temperature or prolonged reaction time. Herein, polycrystalline CHNHPbI micron size crystals can be prepared by reactive crystallization of PbI and CHNHI 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 CHNHPbI product. Moreover, Ostwald ripening of iodide ion into PbI is proposed as the key step to form 3D PbI, followed by the intercalation of CHNH for this reactive crystallization. Interestingly, this result suggests that industry level mass production of micron CHNHPbI crystals is possible with this novel synthesis method.
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