Fuji Pigment recently reported that it is researching and developing a new type of perovskite quantum dots. Fuji stated that the half width of their emission spectra is substantially narrower than that of InP; this property could very beneficial to the application of the dots in display materials, LED, bio-imaging and more.
emission spectra of perovskite quantum dots under 420 nm of irradiation light
The chemical composition of perovskite quantum dots are either CsPbX3 or CH3NH3PbX3 (X= Cl, Br, I). Their quantum efficiency is 50'80 % and their half width is 15'39 nm. Their base solvent is either hexane or toluene. However, finding alternative solvents is a challenge that is now being addressed.
Furthermore, replacing Pb (lead) with another element such as Sn is under study; this entails widening of the half width and a decrease in quantum efficiency. Moreover, Fuji Pigment is trying to coat perovskite quantum dot surface with either polymer or inorganic materials which would enhance the quantum dot resistance against water, light and heat.
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Posted: Sep 12,2017 by Roni Peleg
