Stabilizing and accessing across ternary phase cesium lead bromide perovskite nanocrystals: thermodynamic and kinetic controls

Dual-Emissive Mn-Doped Lead Halide Perovskite Nanocrystals as Background-Suppressed Latent Fingerprint Detection Probes

“…These excitonic features correspond to the zero-dimensional (0D) phase Cs 4 PbBr 6 with CsPbBr 3 clusters formed inside. Figure S1C,D shows transmission electron microscope (TEM) images, indicating 0D phase perovskite nanocrystals characterized by a hexagonal shape with a diameter ranging from 100 to 150 nm, consistent with earlier reports. , …”

“…Figure S1C,D shows transmission electron microscope (TEM) images, indicating 0D phase perovskite nanocrystals characterized by a hexagonal shape with a diameter ranging from 100 to 150 nm, consistent with earlier reports. 39,40 To characterize the dual emission features arising from both exciton and Mn states, we have integrated the PL emission bands for excitons (400−500 nm) and Mn (500−700 nm), respectively. We, then, calculated the PL band ratio using eq 1 = PL band ratio PL band /PL band Mn exciton…”

Exciton Recombination versus Energy Transfer: Mapping Competing Excited-State Dynamics in Various Mn-Doped CsPb(Cl1–yBry)3 Perovskite Nanocrystals for Achieving White Light Emission

“…Cesium lead halide perovskite nanocrystals (CsPbX 3 ; X = Cl, Br, I) represent one of the most promising classes of semiconducting materials that have revolutionized the fields of optoelectronic and photovoltaic devices. − In particular, colloidal synthesis of such nanomaterials with the aid of surface-capping ligands can further help achieve the desirable optoelectronic and light harvesting properties including tunable band gap, emission wavelength, charge carrier lifetime, carrier diffusion length, quantum yield, etc. through modulating the size of the nanocrystals owing to quantum confinement effects. − Additionally, incorporating transition metals (doping) into such host lattices of the nanocrystals provides an additional degree of freedom, allowing for tuning the electronic, magnetic, and optical properties of nanocrystals. − These dopants include transition metals such as Cd 2+ , Zn 2+ , and Mn 2+ as well as lanthanide ions such as Yb 3+ , Tb 3+ , etc. ,,− Specifically, Mn-doped CsPbCl 3 and CsPbBr 3 nanocrystals, wherein divalent Pb 2+ sites are substitutionally replaced with dopant ions, have been intensively investigated since the doping allows for efficient broadband emission centered at ∼600 nm as a result of the exciton-to-dopant energy transfer. − …”