Site-Engineering for Controlling Multiple-Excitation and Emission in Eu2+-Activated CaSrSiO4 Phosphors in Marine Fisheries

https://doi.org/10.1002/adom.202203151

Artificial light fishing technology has been used in marine fisheries for thousands of years. The light source with multi-color adjustable output is expected to become a new generation of fish-attracting lamps. Herein, a new method of crystal-site engineering through reducing atmospheres is proposed for the development of Eu²⁺ doped single-phase phosphor with multi-excitation and multi-emission properties. Following this approach, the distribution ratio of Eu²⁺ at Ca²⁺ and Sr²⁺ sites in CaSrSiO₄ (CSO) can be modulated. Importantly, Eu²⁺ at both lattice sites exhibit non-interfering optical properties, CSO:Eu²⁺ phosphor realizes multi-color output from green to yellow and then to red when Eu²⁺ occupies the Sr²⁺ and Ca²⁺ sites in a relatively balanced ratio. Benefitting from the tunable color range covering the spectral sensitivity regions of most marine fishes, this phosphor may eventually be applied in futuristic innovative fish-attracting lamps.