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Ultra-broad near-infrared photoluminescence from crystalline (K-crypt)2Bi2 containing [Bi2]2− dimers†
Hong-Tao Sun,Tetsu Yonezawa,Miriam M. Gillett-Kunnath,Yoshio Sakka,Sa Chu Rong Gui,Minoru Fujii,Slavi C. Sevov
Journal of Materials Chemistry Pub Date : 08/16/2012 00:00:00 , DOI:10.1039/C2JM34101H
Abstract

For the first time, we report that a single crystal of (K-crypt)2Bi2 containing [Bi2]2− displays ultra-broad near-infrared photoluminescence (PL) peaking at around 1190 nm and having a full width at the half maximum of 212 nm, stemming from the inherent electronic transitions of [Bi2]2−. The results not only add to the number of charged Bi species with luminescence, but also deepen the understanding of Bi-related near-infrared emission behavior and lead to the reconsideration of the fundamentally important issue of Bi-related PL mechanisms in some material systems such as bulk glasses, fibers, and conventional optical crystals.

Graphical abstract: Ultra-broad near-infrared photoluminescence from crystalline (K-crypt)2Bi2 containing [Bi2]2− dimers
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