Enhanced Blue Emission via Pressure Treatment of an Organic-Inorganic Zinc Bromide

Shi-Shuang Huang; Zi-Ying Li; Ying Zhang; Hai-Run Yang; Yungui Liu; Muhammad Azeem; Rui Feng; Wei Li

doi:10.1002/cjoc.202401020

Chinese Journal of Chemistry ›› 2025, Vol. 43 ›› Issue (5) : 524 -530. DOI: 10.1002/cjoc.202401020

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Enhanced Blue Emission via Pressure Treatment of an Organic-Inorganic Zinc Bromide

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Abstract

Pressure-treatment has been shown to be an effective means to enhance fluorescence of organic-inorganic halides though it is only limited to few examples. Here, we report the pressure-dependent structural evolution and emission enhancement upon compression treatment of a zero-dimensional halide, BTPP ₂ZnBr ₄ (BTPP = Benzyl triphenyl phosphonium). Compared to the uncompressed BTPP ₂ZnBr ₄ crystal, the pressure-treated sample shows a maximum 7-fold intensified fluorescence at ambient conditions while maintaining the wide-spectrum blue emission feature. This significantly boosted emission is attributed to the pressure-induced irreversible structural distortion which effectively reduces the non-radiative recombination. This work demonstrates the promising potential of pressure treatment in achieving bright organic-inorganic halide emitters and other molecular fluorescent materials.

Keywords

Organic-inorganic metal halide / Structure / High pressure / Photoluminescence / Emission enhancement

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Shi-Shuang Huang, Zi-Ying Li, Ying Zhang, Hai-Run Yang, Yungui Liu, Muhammad Azeem, Rui Feng, Wei Li. Enhanced Blue Emission via Pressure Treatment of an Organic-Inorganic Zinc Bromide. Chinese Journal of Chemistry, 2025, 43(5): 524-530 DOI:10.1002/cjoc.202401020