Remarkable Piezochromism and Pressure-Induced Blue Emission Enhancement in Complex-Unit Copper Halides

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2025-02-14 DOI:10.1021/acsmaterialslett.4c0255610.1021/acsmaterialslett.4c02556

Ming Cong, Qiushuang Li, Xuchen Wang, Jiayi Yang, Yongguang Li, Le Ye, Guanjun Xiao* and Bo Zou,

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Abstract

Piezochromic luminescent materials (PLMs) exhibit potential applications in pressure sensing, anticounterfeiting, and optical memory. However, balancing a wide range of emission shifts with high pressure-sensitivity remains a challenge. Here, we achieved a considerable blue-shift piezochromism of 187 nm in zero-dimensional (0D) copper halide (TPA)₂Cu₄Br₆ (TPA = Tetrapropylammonium), with a pressure coefficient over 80 nm/GPa below 10 kbar. Structural analysis confirmed that increased pressure deepened the high-energy self-trapped excitons (STEs) and disrupted the orderly arrangement of the [Cu₄Br₆]^2– clusters. These two factors collectively diminished the interaction between STEs and depressed the formation of low-energy STEs, resulting in a significant blue shift in emission. Moreover, the decreased energy loss resulting from depressed phonon–phonon interaction led to a high photoluminescence quantum yield (PLQY) which remained over 70% during the blue-shift process and enabled the enhanced display performance as PLMs. This study demonstrated a highly sensitive PLM and revealed photophysical mechanism regarding the configuration and arrangement of complex clusters.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.