Metal-halide perovskite nanocrystals (NCs) are considered to be promising types of optoelectronic and photonic materials. The emission colors of the cesium lead halide perovskite (CsPbX, X = Cl, Br, I) NCs depend on the joint influence of the emission peaks of the host and its dopant ions. Herein, we report a phosphine-free strategy to synthesize Mn-doped CsPb(Cl/Br) NCs to tune their optical properties in a wide color gamut. Colloidal Mn-doped CsPb(Cl/Br) NCs were synthesized by injecting Cs-oleate solution into the MnCl and PbBr precursor solution. The as-prepared Mn-doped CsPb(Cl/Br) NCs are highly crystalline and uniform sized nanocubes with two emission peaks, including the host emission around 450 nm and the Mn dopant emission around 600 nm, which are sensitive to the MnCl-to-PbBr molar feed ratio and the reaction temperature. By varying the MnCl-to-PbBr molar feed ratio or the reaction temperature, the relative PL intensities of dual color emission can be manipulated, showing their ability in tunable color output.
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| http://dx.doi.org/10.1039/c7ra13306e | DOI Listing |
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