Solid‐State Synthesis of (Ph4P)MI3 (M=Eu2+, Sr2+, Sn2+) and Investigation of Photoluminescence Properties of Green Emitting Phosphor

• Published in: European journal of inorganic chemistry Vol. 2021; no. 19; pp. 1846 - 1851
• Main Authors: Siai, Amira, Ströbele, Markus, Enseling, David, Jüstel, Thomas, Meyer, Hans‐Jürgen
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 20.05.2021
• Subjects: Crystal structure; Crystallography; Europium; Hybrid compounds; Inorganic chemistry; Lifetime; Luminescence; Optical properties; Phosphors; Photoluminescence; Solid-state reaction
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.202100059

This work reports a solid‐state preparation of hybrid tetraphenylphosphonium (Ph4P+) compounds (Ph4P)MI3 (M=Eu2+, Sr2+ and Sn2+). The new materials (Ph4P)EuI3 and (Ph4P)SrI3 are found to crystallize isotypically in the trigonal space group Pc3‾1 , where Eu2+ and Sr2+ ions exhibit similarly two different crystallographic positions and occupy the centers of trigonal antiprismatic sites. The corresponding compound (Ph4P)SnI3 was accordingly prepared by solid‐state reaction to yield yellow crystals which crystallize in a monoclinic structure (P21/c). The luminescent properties of (Ph4P)EuI3 were investigated and the results revealed that Eu2+ displays an intensive green band emission peaked at 536 nm. The radiative decay time determined upon excitation at 536 nm is 508 ns. Solid‐state preparation of hybrid compounds (Ph4P)MI3 (M=Sr2+, Eu2+ and Sn2+) was performed. The new materials (Ph4P)SrI3 and (Ph4P)EuI3 adopt the trigonal structure Pc3‾1 while the (Ph4P)SnI3 crystallize in monoclinic structure P21/c . The novel compound (Ph4P)EuI3 was found to display bright green emission peaked at 536 nm. The radiative decay time determined upon excitation at 536 nm is of 508 ns.