Related Experiment Video
Updated: Jun 26, 2026
08:45
Fabrication of Spatially Confined Complex Oxides
Published on: July 1, 2013
Bonding Scheme and Optical Properties in BiM2 O2 (PO4 ) (M=Cd, Mg, Zn); Experimental and Theoretical Analysis
J Olchowka1,2, O Mentré2, H Kabbour2
1University of Siegen, Department Chemistry/Biology, Faculty of Science and Technology, 57068, Siegen, Germany.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 17, 2017
Summary
This study reveals bright warm white luminescence in Bi(M,M′)₂PO₆ materials, tunable by altering M elements. These findings pave the way for novel phosphors with tailored optical properties.
Area of Science:
- Solid-state chemistry
- Materials science
- Luminescence
Background:
- Bismuth-containing compounds are explored for luminescence applications.
- Understanding structure-property relationships is key for designing new materials.
Purpose of the Study:
- To rationalize the luminescence properties of Bi(M,M′)₂PO₆ series.
- To investigate the influence of M elements (Mg, Zn, Cd) on optical characteristics.
- To explore tunable optical properties in related systems.
Main Methods:
- Optical spectroscopy was employed to study luminescence.
- Empirical and first-principles calculations were used for electronic structure analysis.
- Correlation between lone pair activity and emission energy was established.
Main Results:
- Bright warm white luminescence was observed at room temperature, with high quantum yield (e.g., 22.8% for M=Mg).
- Band gaps were calculated between 2.64–3.62 eV.
- Excitation processes higher than band gaps, attributed to Bi³⁺ transitions, were identified.
- Tunable optical properties were demonstrated in the BiMg₂₋ₓCdₓPO₆ system.
Conclusions:
- Luminescence properties are directly influenced by the M element in Bi(M,M′)₂PO₆.
- The lone pair activity and lattice parameters govern emission energy.
- The Bi₂O₃-MO-X₂O₅ system offers realistic potential for tunable optical materials.
More Related Videos
Related Concept Videos
02:32Bonding in Metals
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
03:24Hybridization of Atomic Orbitals I
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
02:35Molecular Orbital Theory I
Overview of Molecular Orbital Theory
03:51Molecular Orbital Theory II
Molecular Orbital Energy Diagrams
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
02:40MO Theory and Covalent Bonding
The molecular orbital theory describes the distribution of electrons in molecules in a manner similar to the distribution of electrons in atomic orbitals. The region of space in which a valence electron in a molecule is likely to be found is called a molecular orbital. Mathematically, the linear combination of atomic orbitals (LCAO) generates molecular orbitals. Combinations of in-phase atomic orbital wave functions result in regions with a high probability of electron density, while...