Luminescence-structure relationships in solids doped with Bi³

Area of Science:

• Solid State Chemistry
• Materials Science
• Photophysics

Background:

• Bismuth (Bi³⁺) ion luminescence is crucial for various optical applications.
• Understanding the factors influencing Bi³⁺ luminescence in inorganic hosts is essential for materials design.
• Existing models for predicting luminescence properties can be complex and limited in scope.

Purpose of the Study:

• To review and rationalize the luminescence properties of Bi³⁺ in a wide range of inorganic compounds.
• To introduce two simple, broadly applicable models for predicting Bi³⁺ luminescence.
• To provide a step-by-step guide for calculating the nephelauxetic function (he) and a criterion for emission origin determination.

Main Methods:

• Review of luminescence data for 177 inorganic compounds containing Bi³⁺.
• Development and application of two predictive models based on crystal structure information.
• Detailed description of the calculation procedure for the nephelauxetic function (he).
• Introduction of a criterion utilizing the Stokes shift for emission origin analysis.

Main Results:

• The proposed models successfully rationalize the luminescence properties of Bi³⁺ across diverse inorganic compounds.
• The nephelauxetic function (he) calculation is simplified for practical implementation.
• The Stokes shift criterion effectively aids in distinguishing the origin of Bi³⁺-related emissions.
• The models demonstrate applicability to any compound with known crystal structure.

Conclusions:

• The developed models offer a straightforward and effective approach to understanding and predicting Bi³⁺ luminescence.
• Simplified calculation of the nephelauxetic function (he) facilitates its use in computational tools and material design.
• The Stokes shift criterion provides a valuable experimental tool for emission mechanism elucidation.
• This work provides a unified framework for studying Bi³⁺ luminescence in inorganic materials.