Luminescence-structure relationships in solids doped with Bi 3 .

The luminescence properties of Bi 3+ in 177 inorganic compounds are reviewed and rationalized based on two simple and easy-to-use models. These models are applicable to any kind of compound whose crystal structure is known. The calculation of the nephelauxetic function, he , involved in one of the models is described step-by-step for an easy implementation in a home-made calculator or machine-learning algorithm. Finally, a criterion based on the experimental value of the Stokes shift is introduced to help in fixing the origin of the Bi 3+ -related emission.