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Dataset results
11 results for “CsPbBr3”
Femtosecond electron diffraction data of CsPbBr3 nanocrystals
<p>Femtosecond electron diffraction data of CsPbBr3 nanocrystals, acquired at the Fritz Haber Institute in Berlin. All measurements are performed at room temperature.</p>
Broad luminescence generated by IR laser excitation from CsPbBr3:Yb3+ perovskite ceramics
<p><strong>Abstract</strong></p> <p>This paper demonstrates the generation of broadband emission in the visible and infrared ranges induced by a concentrated beam of infrared radiation from CsPbBr3 ceramics doped with Yb3+ ions. The sample was obtained by the conventional solid-state reaction method, and XRD measurements confirmed the phase purity of the material crystallizing in the orthorhombic system. Spectroscopic measurements required further sample preparation in the form of ceramics using a high-pressure press. The research showed that as the excitation power increases, the emission intensity does not increase linearly from the beginning of the experiment. Irradiation of the material results in the accumulation of the delivered energy. Absorption of a sufficient number of photons triggers avalanche emission. It was found that the most intense luminescence is produced in a vacuum. Changes in conductivity were also observed, where the excitation was able to lower the resistivity of the material and it was highly dependent on the excitation power. The mechanism responsible for the generation of the observed phenomenon involving intervalence charge transfer (IVCT) transitions has been postulated.</p>
All-inorganic micrometric CsPbBr3:Yb3+ powder as a multifunctional material for photovoltaics and optical thermometry: structural and optical characterization
<p>Halide perovskites have been studied very intensively by researchers during the last decade. Development of these materials has improved their unique optoelectrical properties reaching even higher standards making them promising candidates for photovoltaic applications. It should be noted that most inorganic halide perovskites obtained to date are synthesized using organic solvents in the form of nanosized colloids. Here, a low-temperature synthesis protocol for the preparation of microcrystalline CsPbBr<sub>3</sub> perovskite powder doped with Yb<sup>3+</sup> ions is proposed. The structural and photoluminescence features of the studied material have been thoroughly investigated and described. It turned out that the excitation of the CsPbBr<sub>3</sub>:Yb<sup>3+</sup> perovskite with a 375 nm wavelength leads to spontaneous luminescence of excitons and Yb<sup>3+ </sup>ions. Hence, the use of CsPbBr<sub>3</sub>:Yb<sup>3+</sup> as a luminescent thermometer or an additional absorbing layer on a solar cell surface is possible. The latter application may result in an increase in the conversion efficiency of the cell. In order to verify this, such a layer was prepared and installed on a commercial silicon solar cell. Its photovoltaic properties have been investigated by the measurements of current-voltage characteristics with 1-sun illumination and spectral characteristics of external quantum efficiency.</p>
Experimental X-ray Diffraction Data for "Cooling-Induced Order-Disorder Phase Transition in CsPbBr3 Nanocrystal Superlattices"
<p>Experimental X-ray diffraction data: </p> <p>-- temperature-dependent diffraction patterns (theta:2theta, rocking curves) for C18 and C8 CsPbBr3 nanocrystal superlattice samples;</p> <p>-- room temperature diffraction patterns (theta:2theta, rocking curves) for C6, C8, C10, C12, and C18 CsPbBr3 nanocrystal superlattices;</p> <p>in all files, first column is angle in degrees and the second column is intensity.</p>
Dataset of "Resonant Band-Edge Emissive States in Strongly Confined CsPbBr3 Perovskite Nanoplatelets"
<p>Dataset underpinning the published article:</p> <p>Resonant Band-Edge Emissive States in Strongly Confined CsPbBr<sub>3</sub> Perovskite Nanoplatelets.</p> <p><em>J. Phys. Chem. C, </em><strong>2021,</strong> . <a href="https://doi.org/10.1021/acs.jpcc.1c01353">DOI: 10.1021/acs.jpcc.1c01353</a></p>
Dataset of "Direct Observation of Shallow Trap States in Thermal Equilibrium with Band-Edge Excitons in Strongly Confined CsPbBr3 Perovskite Nanoplatelets""
<p>Dataset underpinning the published article:</p> <p>Direct Observation of Shallow Trap States in Thermal Equilibrium with Band-Edge Excitons in Strongly Confined CsPbBr<sub>3</sub> Perovskite Nanoplatelets</p> <p><em>Adv. Optical Mater.</em> <strong>2021</strong>, <em>9</em>, 2001308. DOI: <a href="http://doi.org/10.1002/adom.202001308">10.1002/adom.202001308</a></p>
Dataset of "Exciton, Biexciton, and Hot Exciton Dynamics in CsPbBr3 Colloidal Nanoplatelets"
<p>Dataset underpinning the published article:</p> <p>B. R. C. Vale; E. Socie; A. Burgos-Caminal; J. Bettini; M. A. Schiavon and J.-E. Moser.<br> Exciton, Biexciton, and Hot Exciton Dynamics in CsPbBr<sub>3</sub> Colloidal Nanoplatelets<br> <em>J. Phys. Chem. Lett. </em><strong>2020</strong>, <em>11</em>, 387-394; <a href="https://pubs.acs.org/doi/10.1021/acs.jpclett.9b03282">DOI: 10.1021/acs.jpclett.9b03282.</a>.</p>
Data and code for "Revealing the free energy landscape of halide perovskites: Metastability and transition characters in CsPbBr3 and MAPbI3"
<p>This record contains a neuroevolution potential (NEP) model (<code>nep-MAPI-SCAN.txt</code> ) for MAPbI3 used in the linked publication. The model can be used in conjunction with the <a href="https://gpumd.org">GPUMD package</a>. The <a href="https://calorine.materialsmodeling.org">calorine package</a> provides a Python interface to GPUMD.<br> Several primitive structures in extended xyz format can be found in the <code>*.xyz</code> files. These structures have been relaxed using the NEP model included here. The <code>demo-for-using-structures-and-model.py</code> script illustrates how to access the structures and model.</p>
Dataset for magneto-optical spectroscopy of CsPbBr3-based perovskite nanoplatelets
<p>This dataset includes raw photoluminescence and transmission spectra acquired in a pulsed magnetic field. The values of the magnetic field in each acquisition frame of a given pulse are reported in the corresponding *.dat file. In this file, the three columns relate to the value of the field at the beginning of the acquisition, at the end of the acquisition, and to the magnetic field value averaged over the duration of the acquisition frame. For each pulse, identified as sxx, where xx is an integer from, 30 frames are acquired. The PL spectra are identified explicitly by writing PL in the file name. The transmission spectra do not have any explicit mention. The acquisition time of each frame is 2ms. Measurements carried out in the Voigt configuration are performed in the linear polarization basis. 0d indicates that the polarizer is oriented parallel to the magnetic field vector. 90d indicates that the polarizer is oriented perpendicular to the magnetic field vector. The dataset is organized in three main folders, each conteining data for a given thickness of the colloidal nanoplatelets investigated.</p>
The Reactivity of CsPbBr3 Nanocrystals toward Acid/Base Ligands
<p>This is a dataset generated for the publication titled "The Reactivity of CsPbBr<sub>3</sub> Nanocrystals toward Acid/Base Ligands". This version 0.1.0 contains two *.zip files: 1. A folder containing a set of subfolder for each of the figures reported in the main document and supporting information. 2. A folder containing the rawdata for the nuclear magnetic resonance (NMR) results shown in Figure 6 and 8 of the main document and Figure S8 of the supporting information. This folder has 3 folders named with the corresponding figure number, and a README file for instruction on the 2D NMR.</p>
Zeondo dataset for Probing the limits of the phonon quasi-particle picture: Transitions between underdamped and overdamped dynamics in CsPbBr3
<p>Zeondo dataset for Probing the limits of the phonon quasi-particle picture: The transition from underdamped to overdamped dynamics in CsPbBr3</p>
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