69276-13-7

Usage

Uses

Used in Solar Cell Industry:
Perovskite CH3NH3PbBr3 Powder is used as a light-absorbing material for solar cells due to its high absorption coefficient and tunable bandgap. This allows for efficient conversion of sunlight into electricity, leading to improved solar cell performance and potentially lower production costs.
Used in Light-Emitting Diode (LED) Industry:
In the LED industry, Perovskite CH3NH3PbBr3 Powder is utilized as an emissive layer in light-emitting diodes. Its excellent optoelectronic properties enable the development of high-efficiency and low-cost LEDs with tunable emission colors, catering to various lighting and display applications.
Used in Optoelectronic Devices:
Perovskite CH3NH3PbBr3 Powder is employed as a key component in various optoelectronic devices, such as photodetectors and lasers, owing to its superior charge transport and light emission properties. This material's versatility and performance make it suitable for a wide range of applications, including imaging, sensing, and communication systems.
However, it is important to note that the stability and potential toxicity of Perovskite CH3NH3PbBr3 Powder are still under investigation. Ongoing research aims to address these challenges and enhance the material's suitability for commercial applications in the optoelectronic industry.

Upstream product

• 10035-10-6 hydrogen bromide 
• 301-04-2 lead acetate 
• 74-89-5 methylamine 
• 6876-37-5 methylammonium bromide 
• 7732-18-5 water 

Relevant academic research and scientific papers

Properties of CH3NH3PbX3 (X = I, Br, Cl) powders as precursors for organic/inorganic solar cells

CH3NH3PbX3 (X = Cl, Br, I) perovskites were prepared by a self-organization processes using different precursor solutions. The XRD analysis indicates the formation, at room temperature, of a tetragonal structure (space group I4/mcm) for X = I, of a cubic structure (space group Pm3m) for X = Br, and of centro-symmetric cubic structure (space group Pm3m) for X = Cl, respectively. The structural analysis revealed the formation of CH3NH3Cl as secondary phase in the Cl-containing system. The morphological investigation revealed the formation of rhombo-hexagonal dodecahedra crystallite for X = I, Br, whereas cube-like aggregates were observed for X = Cl. The thermogravimetric analysis performed in air did not reveal any loss until 250 °C for X = I and 300 °C for X = Br, respectively, whereas the differential thermal analysis (DTA) detected two endothermic thermal events (at 336 and 409 °C) for X = I and one only (379 °C) for X = Br, respectively. The infrared spectra (IR) of the powders conformed to the 3-fold symmetry of the methylammonium ion which rotates around the C-N axis. Optical absorption measurements indicated that the CH3NH3PbX3 systems behave as direct-gap semiconductors with energy band gaps of 1.53 eV for X = I, 2.20 eV for X = Br, and 3.00 eV for X = Cl, respectively, at room temperature. The direct-gap semiconductivity for X = I and X = Br was confirmed by the photoluminescence emission measurements, whereas the compound for X = Cl is inactive. I-containing powders were dissolved in an organic solvent (dimethyl-formamide, DMF). The dispersion (100-300 μL) was dropped on glassy substrates on which thick films were obtained by spin-coating and thermal treatment at 120 °C for ca. 5 min. The preparation of the layers was performed in air at room temperature.

Systematic studies on chain lengths, halide species, and well thicknesses for lead halide layered perovskite thin films

Two-dimensional layered perovskite compounds, (CnH 2n+1NH3)2(CH3NH3) m-1PbmX3m+1 (n = 2, 3, 4, 6, and 10; X = Cl, Br, and I; m = 1, 2, and 3) were systematically prepared. The influences of the barrier-size, halide species, and well thickness of the perovskite thin films on the quantum confinement structures were investigated. The layered perovskite films showed a strong and clear absorption peak due to excitons confined in inorganic quantum-wells. The exciton peak shifted to lower energy as the halide species was changed from Cl to Br and I. Furthermore, fine multilayer perovskite compound films were prepared by varying the spin-coating conditions.

Structural Phase Transition and Electrical Conductivity of the Perovskite CH3NH3Sn1-xPbxBr3 and CsSnBr3

A series of solid solutions, CH3NH3Sn1-xPbxBr3 (X=0-1), having cubic perovskite structures was obtained by solid-state reactions.The 119Sn Moessbauer spectra for xa regular octahedron at 110 K.On the other hand, a single Lorentzian spectrum having a larger isomer shift was observed for x>0.7, suggesting the presence of a regular SnBr6 octahedra in the perovskite CH3NH3PbBr3 matrix.The high electrical conductivity of the perovskite CsSnBr3 drastically decreased upon the replacement of the cation by CH3NH3 and the central metal by Pb.This behavior suggests that both the infinite linear chain (-Br-Sn(Br)-Br-) and its bond length have significant importance regarding electrical conductivity.

Impact of Bi3+ Heterovalent Doping in Organic-Inorganic Metal Halide Perovskite Crystals

Intrinsic organic-inorganic metal halide perovskites (OIHP) based semiconductors have shown wide applications in optoelectronic devices. There have been several attempts to incorporate heterovalent metal (e.g., Bi3+) ions in the perovskites in an attempt to induce electronic doping and increase the charge carrier density in the semiconductor. It has been reported that inclusion of Bi3+ decreases the band gap of the material considerably. However, contrary to the earlier conclusions, despite a clear change in the appearance of the crystal as observed by eye, here we show that the band gap of MAPbBr3 crystals does not change due the presence of Bi3+ in the growth solution. An increased density of states in the band gap and use of very thick samples for transmission measurements, erroneously give the impression of a band gap shift. These sub band gap states also act as nonradiative recombination centers in the crystals.

Comparative study on the excitons in lead-halide-based perovskite-type crystals CH3NH3PbBr3 CH3NH 3PbI3

Optical absorption and magnetoabsorption spectra of the lead-halide-based perovskite-type crystals, CH3NH3PbX3 (X = Br, I) have been investigated. The lowest-energy excitons in these crystals are normal three-dimensional Wannier-type excitons. Bohr radii, binding energies, reduced masses, effective g factors, and oscillator strengths of the excitons have been determined with satisfactory accuracy. A larger bandgap and more tightly bound nature of the excitons in CH3NH3PbBr 3 compared to those in CH3NH3PbI3 are a natural consequence of the halogen substitution.

Calorimetric and IR spectroscopic studies of phase transitions in methylammonium trihalogenoplumbates (II)

Heat capacities of CH3NH3PbX3 (X = Cl, Br, I) were measured between 13 and 300 K (365 K for the iodide). Two anomalies were found in the chloride and the iodide, and three in the bromide. All the phase transitions were of

Dynamic disorder in methylammoniumtrihalogenoplumbates (II) observed by millimeter-wave spectroscopy

The temperature-dependent structure of crystalline methylammoniumtrihalogenoplumbates (II)-CH3NH+3 PbX-3 (X = Cl, Br, I)-as determined by x-ray diffraction, is compared with measurements of the temperature-dependent complex permittivity at frequencies of 50-150 GHz.The dielectric measurements reveal a picosecond relaxation process which corresponds to a dynamic disorder of the methylammonium group in the high-temperature phases of the trihalogenoplumbates.

Bottom-up synthesis of bright fluorescent, moisture-resistant methylammonium lead bromide@poly(3-bromothiophene)

Colloidal organic-inorganic lead halide perovskites have gained tremendous attention due to their excellent optical properties and promising future in optoelectronic applications. However, the lack of large scale synthesis methods and structural instability in moisture conditions restrict their practical applications. We report, for the first time, a gram-scale aqueous synthesis of MAPbBr3 (MA = CH3NH3+) using PbCO3, bottom-up synthesis of MAPbBr3 NCs and in situ bottom-up synthesis of MAPbBr3@poly(3-bromothiophene) nanocomposite. The synthesized nanocomposite material exhibits bright green fluorescence and excellent water-resistivity. Together, the polymer-based bottom-up and in situ encapsulation strategy of MAPbBr3 NCs will pave the way for synthesizing other lead halide water-resistant perovskites that will be used in thin-film based light-emitting devices.

In situ gas/solid reaction for the formation of luminescent quantum confined CH3NH3PbBr3 perovskite planar film

We demonstrate a new strategy for the in situ formation of highly luminescent CH3NH3PbBr3 perovskite planar film via the reaction between PbBr2 and methylamine gas. The obtained CH3NH3PbBr3 perovskite planar film exhibited similar quantum confinement to solution chemistry synthesized colloidal CH3NH3PbBr3 quantum dots. Such quantum confinement was realized by a PbOx/Pb(OH)2 framework, which is a by-product formed in situ from the reaction of PbBr2 and methylamine gas under ambient conditions.