Issue 36, 2012
From the journal:

Dalton Transactions

Photoluminescence from Bi5(GaCl4)3 molecular crystal

Hong-Tao Sun,*ab   Beibei Xu,c   Tetsu Yonezawa,a   Yoshio Sakka,d   Naoto Shirahata,ef   Minoru Fujii,g   Jianrong Qiuc  and  Hong Gaob  

* 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 International Center for Young Scientists (ICYS), National Institute for Material Sciences (NIMS), 1-2-1 Sengen, Tsukuba-city, Ibaraki 305-0047, Japan

c State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, Zhejiang, P.R. China

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

e World Premier International Research Center Initiative for Materials, Nanoarchitronics (MANA), NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

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

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

Abstract

Bi5(GaCl4)3 sample has been synthesized through the oxidation of Bi metal by gallium chloride (GaCl3) salt. Powder X-ray diffraction as well as micro-Raman scattering results revealed that, in addition to crystalline Bi5(GaCl4)3 in the product, an amorphous phase containing [GaCl4]− and [Ga2Cl7]− units also exists. The thorough comparison of steady-state and time-resolved photoluminescent behaviors between the Bi5(GaCl4)3 product and Bi5(AlCl4)3 crystal leads us to conclude that Bi53+ is the dominant emitter in the product, which gives rise to the ultrabroad emission ranging from 1 to 2.7 μm. Detailed quantum chemistry calculation helps us assign the observed excitations to some electronic transitions of the Bi53+ polycation, especially at shorter wavelengths. It is believed that our work shown here is not only helpful to solve the confusions on the luminescent origin of bismuth in other material systems, but also serves to develop novel broadband tunable laser materials.

Graphical abstract: Photoluminescence from Bi5(GaCl4)3 molecular crystal

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Article information

DOI
https://doi.org/10.1039/C2DT31167D
Article type
Paper
Submitted
31 May 2012
Accepted
11 Jul 2012
First published
11 Jul 2012

Dalton Trans., 2012,41, 11055-11061

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Photoluminescence from Bi5(GaCl4)3 molecular crystal

H. Sun, B. Xu, T. Yonezawa, Y. Sakka, N. Shirahata, M. Fujii, J. Qiu and H. Gao, Dalton Trans., 2012, 41, 11055 DOI: 10.1039/C2DT31167D

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