scholarly journals Distortion Induced Structural Characteristics of Ba2R2/3TeO6 (R =Y, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) Double Perovskites and its Multifunction Optical Properties in Lighting and Ratiometric Temperature Sensing

2021 ◽  
Author(s):  
Sariga C. Lal ◽  
I. N. Jawahar ◽  
G. Subodh
Keyword(s):  
Optical Properties ◽  
Ir Spectra ◽  
Structural Characteristics ◽  
Temperature Sensing ◽  
Double Perovskites ◽  
Theoretical Predictions ◽  
Raman And Ir Spectra

Group theoretical predictions obtained from Raman and IR spectra emphasize the structure of B-site ordered double perovskites Ba2R2/3TeO6 (R =Y, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) with ubiquitous...

scholarly journals Electronic and optical properties of vacancy ordered double perovskites A2BX6 (A = Rb, Cs; B = Sn, Pd, Pt; and X = Cl, Br, I): a first principles study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Muhammad Faizan ◽  
K. C. Bhamu ◽  
Ghulam Murtaza ◽  
Xin He ◽  
Neeraj Kulhari ◽  
...  
Keyword(s):  
Optical Properties ◽  
Band Gap ◽  
First Principles ◽  
Density Functional ◽  
Perovskite Solar Cells ◽  
Dielectric Constants ◽  
Maximum Efficiency ◽  
Exchange Potential ◽  
Double Perovskites ◽  
Electronic And Optical Properties

AbstractThe highly successful PBE functional and the modified Becke–Johnson exchange potential were used to calculate the structural, electronic, and optical properties of the vacancy-ordered double perovskites A2BX6 (A = Rb, Cs; B = Sn, Pd, Pt; X = Cl, Br, and I) using the density functional theory, a first principles approach. The convex hull approach was used to check the thermodynamic stability of the compounds. The calculated parameters (lattice constants, band gap, and bond lengths) are in tune with the available experimental and theoretical results. The compounds, Rb2PdBr6 and Cs2PtI6, exhibit band gaps within the optimal range of 0.9–1.6 eV, required for the single-junction photovoltaic applications. The photovoltaic efficiency of the studied materials was assessed using the spectroscopic-limited-maximum-efficiency (SLME) metric as well as the optical properties. The ideal band gap, high dielectric constants, and optimum light absorption of these perovskites make them suitable for high performance single and multi-junction perovskite solar cells.

Insights into the crystal structure and multifunctional optical properties of A2CdTeO6 (A=Ba, Sr, Ca) double perovskites

2021 ◽  
Vol 865 ◽  
pp. 158902
Author(s):  
Nithin Jayan Suraja ◽  
Ambazhathil Mahesh ◽  
Kaithakkal Solaman Sibi ◽  
Subodh Ganesanpotti
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Double Perovskites

Correlation Between Structure and Phonon Spectra of Linear Polyiodide Chains in Tl6I6M2/nn+(I4)2-, [M = Pb, Ag, Au, (Bi0.5 Tl0. 5)]

1980 ◽  
Vol 35 (4) ◽  
pp. 389-402
Author(s):  
H. J. Stolz ◽  
G. Trageser
Keyword(s):  
Ir Spectra ◽  
Phonon Spectra ◽  
Raman And Ir Spectra

Abstract Raman-and IR-spectra of four compounds of the general composition Tl6I6M2/n n+(I4) [n: formal valence of the M-atom, M = Ag, Au, Pb and (Bi0.5Tl0.5)] were investigated in order to identify the polyiodide species present. In accordance with structural results comparable amounts of I42-and I3-/I--groups were found for M = Ag, Pb and (Bi0.5Tl0.5), while in Tl6I6Au2(I4) I3-/I--groups predominate.

Structure and Optical Properties of Hybrid-Layered-Double Perovskites (C8H20N2)2AgMBr8 (M = In, Sb, and Bi)

2021 ◽  
Author(s):  
Hang Ruan ◽  
Zhongnan Guo ◽  
Jiawei Lin ◽  
Kunjie Liu ◽  
Lingling Guo ◽  
...  
Keyword(s):  
Optical Properties ◽  
Double Perovskites

scholarly journals Tailoring Electro/Optical Properties of Transparent Boron-Doped Carbon Nanowalls Grown on Quartz

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 547 ◽  
Author(s):  
Mattia Pierpaoli ◽  
Mateusz Ficek ◽  
Michał Rycewicz ◽  
Mirosław Sawczak ◽  
Jakub Karczewski ◽  
...  
Keyword(s):  
Optical Properties ◽  
Growth Temperature ◽  
Structural Characteristics ◽  
Visible Region ◽  
Boron Doping ◽  
Light Transmittance ◽  
Boron Doped ◽  
Energy Conversion And Storage ◽  
Potential Applications ◽  
Carbon Nanowalls

Carbon nanowalls (CNWs) have attracted much attention for numerous applications in electrical devices because of their peculiar structural characteristics. However, it is possible to set synthesis parameters to vary the electrical and optical properties of such CNWs. In this paper, we demonstrate the direct growth of highly transparent boron-doped nanowalls (B-CNWs) on optical grade fused quartz. The effect of growth temperature and boron doping on the behavior of boron-doped carbon nanowalls grown on quartz was studied in particular. Temperature and boron inclusion doping level allow for direct tuning of CNW morphology. It is possible to operate with both parameters to obtain a transparent and conductive film; however, boron doping is a preferred factor to maintain the transparency in the visible region, while a higher growth temperature is more effective to improve conductance. Light transmittance and electrical conductivity are mainly influenced by growth temperature and then by boron doping. Tailoring B-CNWs has important implications for potential applications of such electrically conductive transparent electrodes designed for energy conversion and storage devices.

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