Perovskite nanoparticles
having a crystalline structure have attracted
scientists’ attention due to their great potential in optoelectronic
and scintillation applications. The photoluminescence quantum yield
(PLQY) is one of the main critical photophysical properties of the
perovskite nanoparticles. Unfortunately, the main limitation of cesium
lead halide perovskites is their instability in an ambient atmosphere,
where they undergo a rapid chemical decomposition within time. For
this purpose, hexadecyltrimethylammonium bromide (CTAB) was used as
a surfactant dopant to test in the first place its effect on the stability
of CsPbBr
3
perovskites and on the PLQY values of the prepared
perovskites. The addition of CTAB has proven its efficiency in the
formed CsPbBr
3
nanoparticles by increasing their thermal
stability and by enhancing their PLQY up to 75%. These results were
obtained after the successful preparation of CsPbBr
3
perovskite
nanoparticles by optimizing three different reaction parameters, starting
from the time of the reaction, moving to the concentration of lead
bromide, and ending with the concentration of cesium oleate. Therefore,
it was found that the most stable CsPbBr
3
perovskites were
formed when mixing 0.15 g of lead bromide heated for 40 min with a
volume of 1.2 mL of cesium oleate.
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