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; Naoto Shirahata; Sa Chu Rong Gui; Minoru Fujii; Slavi C. Sevov

doi:10.1039/C2JM34101H

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

Hong-Tao Sun,*^a Tetsu Yonezawa,^a Miriam M. Gillett-Kunnath,^b Yoshio Sakka,^c Naoto Shirahata,^cd Sa Chu Rong Gui,^e Minoru Fujii^e and Slavi C. Sevov*^b

Author affiliations

* Corresponding authors

^a Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628, Japan
E-mail: timothyhsun@gmail.com
Fax: +81-11-706-7881

^b Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
E-mail: ssevov@nd.edu
Fax: +1-574-631-6652

^c Advanced Ceramics Group, Materials Processing Unit, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba-city, Ibaraki 305-0047, Japan

^d PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan

^e Department of Electrical and Electronic Engineering, Kobe University, Kobe 657-8501, Japan

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.

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Article information

DOI: https://doi.org/10.1039/C2JM34101H
Article type: Communication
Submitted: 25 Jun 2012
Accepted: 16 Aug 2012
First published: 16 Aug 2012

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J. Mater. Chem., 2012,22, 20175-20178

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

H. Sun, T. Yonezawa, M. M. Gillett-Kunnath, Y. Sakka, N. Shirahata, S. C. Rong Gui, M. Fujii and S. C. Sevov, J. Mater. Chem., 2012, 22, 20175 DOI: 10.1039/C2JM34101H

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