Photoluminescence enhancement in lead-free copper-alloyed metal halide

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-12-25 DOI:10.1016/j.jlumin.2024.121048

Ranran Fan, Xiwen Zhang, Junpeng Qiao, Jiaxin Xu, Sujuan Feng, Guangqiang Liu

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引用次数: 0

Abstract

In recent years, all-inorganic cesium lead halide perovskites have attracted wide attention due to excellent features. Nevertheless, the problems of structure instability and toxicity of Pb greatly hinder their widespread applications. As a consequence, lead-free metal halides have become the research focus in the development of new materials and devices. In this paper, Cu(I)-alloyed Cs₂AgBr₃ was successfully synthesized, it had been found that trace amount of Cu ions could greatly enhance the luminescence efficiency. Theoretical calculation demonstrated that the incorporation of Cu distinctly regulated the materials' electronic band structure, the new formation of CuBr₄ tetrahedron played an important role in the forceful restriction to the self-trapped excitons’ spatial distribution and contributed to the improvement of luminescence efficiency. In addition, this material displayed good structural stability under ambient conditions. These results demonstrated that the lead-free Cu(I)-alloyed Cs₂AgBr₃ could become hopeful candidate in the optoelectronic fields.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.