The present manuscript aims at the synthesis of cesium based halide perovskite nanostructures and the effect of cobalt doping on the structural, optical, lumnisent, charge storage and photocatalytic properties. In a very first attempt, we report the solvothermal synthesis of Co doped CsPbCl3 nanostructures under subcritical conditions. The structural features were demonstrated by X-ray diffraction (XRD) Surface morphology determined cubic shape of the synthesized particles. Doping is an excellent way to modify the properties of host material in particular to the electronic structure or optical properties. Incorporation of Co2+ ions in the perovskite structure tunes the optical properties of the nanostructures making this perovskite a visible light active material (Eg = 1.6 eV). This modification in the optical behaviour is the result of size effect, the crystallite size of the doped nanostructures increases with cobalt doping concentration. Photolumniscance (PL) study indicated that CsPbCl3 exhibited Blue emission. Thermogravametric analysis (TGA) revealed that the nanostructures are quite stable at elavated temperatures. The electrochemical performance depicts the pseudocapacative nature of the synthesized nanostructures and can used for charge storage devices. The charge storage capability showed direct proportionality with cobalt ion concentration. And Finally the photocatalytic performance of synthesized material shows superior catalytic ability degrading 90% of methylene blue (MB) dye in 180 min under visible light conditions.
Mn doping in SrSnO
3
perovskite material via hydrothermal
process under subcritical conditions is reported for the very first
time. The present article aims to carry this perovskite suitable for
blue light-emitting diodes (LEDs) and spintronic applications. The
influence of various Mn doping percentages on structural, morphological,
compositional, optical, photoluminescent, and magnetic properties
of SrSnO
3
is demonstrated. The perovskite material is grown
in an orthorhombic crystal structure having a space symmetry of
Pnma
along with point group of
mmm
as determined from the Rietveld refinement. Doping is
an excellent way to modify the properties of wide-band-gap perovskite
nanostructures. Incorporation of Mn is the result of exact substitution.
Morphological studies indicate formation of rodlike structures with
thickness in nanoscale dimensions (180–280 nm), and the thickness
is a function of doping concentration. The higher doping concentration
resulted in enhanced growth of the nanorods. Selected area electron
diffraction (SAED) results showed the single-crystal nature of the
nanorods. Thermogravimetric analysis (TGA) confirmed the high stability
of the material at elevated temperatures. Also, the doped perovskite
material is transparent in the visible light, active in the ultraviolet
region having a band gap of ∼2.78 eV, and is tuned up to 2.25
eV as the Mn doping concentration reaches 10%. The transfer of excitonic
energy from the host material to the dopant Mn
2+
ion leads
to the formation of spin-forbidden [
4
T
1
–
6
A
1
] emission. Later on, photoluminescence study
indicates an enhancement in luminescence behavior of Mn doped perovskite
nanostructures. The Commission Internationale de l’éclairage
(CIE) diagram drawn to find the color coordinates of the nanorods
determines their suitability for blue LEDs. In addition, Mn doping
results the conversion of diamagnetic SrSnO
3
into a ferromagnetic
material, making the nanorods suitable for spintronic applications.
Recent advances in bandgap engineering have increased
the possibility
of vacancy ordered double halide perovskites (VO-DHPs), Cs2SnX6 where X = Cl, Br, I with designable optoelectronic
features. Doping with La3+ ions modulates the band gap
from 3.8 to 2.7 eV, allowing a steady room temperature dual emission
(PL) centered at 440 and 705 nm in Cs2SnCl6.
Pristine Cs2SnCl6 and La:Cs2SnCl6 both have a crystalline cubic structure with a space symmetry
of Fm3m. The cubic phase correlates
well with the Rietveld refinement. SEM analysis confirms anisotropic
development with huge micrometer-sized (>10 μm) truncated
octahedral
structures. DFT investigations show that the insertion of La3+ ions into the crystal lattice leads to the band splitting. The present
study elaborates the experimental understanding of the dual PL emission
properties of La:Cs2SnCl6 leaving a scope for
detailed theoretical study on the origin of the complex electronic
transitions involving f-orbital electrons.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.