Search

The perovskite crystals formed by methylammonium lead iodide (MAPbI3) have garnered growing interest owing to their exceptional photovoltaic capabilities, economical production process, and ability to be processed in solution. A multitude of techniques have been devised to produce dense and uniform perovskite thin coatings, which are critical for the proper functioning of electronic devices. In order to promote the development of CH3NH3PbI3 perovskite thin films that are uniform, dense, and exceptionally smooth, we present an additive-assisted method utilizing Copper zinc tin sulfide Cu2ZnSnS4 (CZTS) nanoparticles. The surface, optical, morphological, and structural properties were subsequently determined. The mechanisms by which the additive improves the quality of the material during the formation of CH3NH3PbI3 perovskite films are elucidated in this study. These processes are postulated to characterize the crystallization of the films. Using this beneficial technique, a high-quality CH3NH3PbI3 film with a grain size significantly larger than 1.6 μm was effectively manufactured. Additionally, the doping process resulted in enhancements in both absorption and photoluminescence intensity. The addition of CZTS NPs elevated the crystal structures and morphologies of the CH3NH3PbI3 layer to a degree that was comparatively favorable. This was evidenced by the crystallite size of 83 nm and an optical bandgap (Eg) of 1.63 eV, both of which attest to the enhanced quality of the film. With the structure of glass/FTO/TiO2/CH3NH3PbI3:CZTS NPs/spiro-oMeTAD/Au ,the power conversion efficiency (PCE) of the best cell was 15.13% with a fill factor of 66.07%. The results of this study indicate that doping CH3NH3PbI3 solar cells with CZTS NPs is a dependable method for enhancing photovoltaic performance and promoting crystal growth. [ABSTRACT FROM AUTHOR]

Magnetic materials possess the capability to generate magnetic fields, which facilitates the effective conversion of energy, storage of information, and transmission in contemporary electronic systems. The present study includes the spin-polarized computation on the mechanical, structural, thermodynamic, optical and transport characteristics of Rb2NaMoX6 (X = Br, I). The studied perovskites are found to be stable structurally, mechanically and thermodynamically. An energy gap in both spin channels appears on the (X–X) symmetry lines, suggesting a direct gap for both perovskites. A high magnetic moment of 3 μB\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$${\upmu }_{\text{B}}$$\end{document} is attained for Rb2NaMoX6 (X = Br, I) which favors their potential applications in spintronics. Elastic attributes depict that Rb2NaMoBr6 is ductile, while Rb2NaMoI6 is brittle. The Rb2NaMoBr6 exhibits high value of θD\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$${\uptheta }_{\text{D}}$$\end{document}, showing its stiffer nature than Rb2NaMoI6. Optical absorption in UV range for Rb2NaMoBr6 and in visible range for Rb2NaMoI6 is the indicator to utilize these materials for optoelectronic applications. [ABSTRACT FROM AUTHOR]

Double perovskites based on rubidium have demonstrated potential for obtaining high solar cell power conversion efficiencies. Their distinct crystal structure and electrical characteristics influence these materials’ potential as effective light absorbers. In this present manuscript, a detailed scrutiny of the physical aspects of halide perovskites Rb2TlAsI6 and Rb2TlGaI6 is presented using density functional theory framework implanted in Wien2K code using. Modified Becke Johnson potential is employed to treat the exchange–correlation effects. A computed tolerance factor, octahedral tilting, and formation energy ensure the structural and thermodynamic stability of given structures. Three independent elastic constants and mechanical properties were computed using the Thomas Charpin method. Ductile nature of Rb2TlAsI6 and brittle nature for Rb2TlGaI6 is revealed from computed mechanical attributes. The Debye temperature for Rb2TlGaI6 (171.32 K) is noted higher than Rb2TlAsI6 (144.53 K). Electronic properties revealed a direct bandgap (1.09 eV) for Rb2TlAsI6 and an indirect bandgap (1.2 eV) for Rb2TlGaI6. Optical properties indicate high polarization and absorption of incident light, which is suitable for photovoltaic applications in the visible spectrum. [ABSTRACT FROM AUTHOR]