Bismuth halides with formula A3Bi2X9, {where|exactly where} A {is an|is definitely an} inorganic or organic cation, show desirable properties as solar absorbers and luminescent {materials|supplies|components}. {Control|Manage|Handle} of structural and electronic dimensionality {of these|of those} compounds {is important|is essential|is very important|is vital|is significant} to yield {materials|supplies|components} with {good|great|excellent|very good|fantastic|superior} light absorption and charge transport. {Here|Right here} we report mechanochemical reaction of (CH3NH3)3Bi2Br9 with SnBr2 at {room|space|area} temperature in air, yielding a material with {strong|powerful|robust|sturdy} absorption across the visible and near-infrared (NIR) {region|area}. We attribute this to mixed valence doping of Sn(II) and Sn(IV) {on the|around the} Bi {site|website|web site|internet site|web-site|web page}. X-ray diffraction shows no secondary phases, even {after|following|right after|soon after|immediately after|just after} heating at 200oC {to improve|to enhance} crystallinity. X-ray photoelectron spectroscopy suggests the presence of Sn(II) and Sn(IV) states. A {similar|comparable|equivalent|related} {approach|method|strategy} to dope Sn {into the|in to the} iodide analogue (CH3NH3)3Bi2I9 was unsuccessful. tert-Butyl (3-iodopropyl)carbamate Order 1H-Pyrrole-2,3,5-tricarboxylic acid custom synthesis PMID:23805407
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