Cesium lead halide perovskite nanocrystals of general
formula CsPbX3are having tremendous impact on a vast array
of technologies
requiring strong and tunable luminescence across the visible range
and solutions processing. The development of plastic scintillators
is just one of the many relevant applications. The syntheses are relatively
simple but generally unsuitable to produce a large amount of material
of reproducible quality required when moving from proof-of-concept
scale to industrial applications. Wastes, particularly large amounts
of lead-contaminated toxic and flammable organic solvents, are also
an open issue. We describe a simple and reproducible procedure enabling
the synthesis of luminescent CsPbX3nanobricks of constant
quality on a scale going from 0.12 to 8 g in a single batch. We also
show complete recycling of the reaction wastes, leading to dramatically
improved efficiency and sustainability.