Tuning the luminescent properties of a three-dimensional perovskite ferroelectric (Me-Hdabco)CsI Sn() doping

• Published in: Dalton transactions : an international journal of inorganic chemistry 2023-02, Vol.52 (9), p.2799-283
• Main Authors: Wang, Ze-Jie, Wu, Ling-Kun, Wang, Na, Hu, Qian-Qian, Li, Jian-Rong, Ye, Heng-Yun
• Format: Article
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d2dt03939g

As promising functional materials, organic-inorganic hybrid metal halide perovskites have attracted significant interest because of their excellent photovoltaic performance. However, although considerable efforts have been made, three-dimensional (3D) metal halide perovskites beyond lead halides have been rarely reported. Herein, a new 3D organic-inorganic hybrid ferroelectric material (Me-Hdabco)CsI 3 ( 1 , Me-Hdabco = N -methyl-1,4-diazoniabicyclo[2.2.2]octane) was synthesized and characterized. 1 underwent a ferroelectric to paraelectric phase transition at T c = 441 K, which was investigated by differential scanning calorimetry (DSC), dielectric measurements, and variable temperature structural analyses. Moreover, 1 shows a clear ferroelectric domain switching recorded by piezoelectric force microscopy. More interestingly, the pristine colorless crystal of 1 has no photoluminescence properties, while 10% Sn( ii ):(Me-Hdabco)CsI 3 shows intense photoluminescence with a quantum yield of 8.90% under UV excitation. This finding will open up a new avenue to probe organic-inorganic hybrid multifunctional materials integrated ferroelectric and photoluminescence. A three-dimensional perovskite-type ferroelectric of (Me-Hdabco)CsI 3 was synthesized and characterized, and the photoluminescence properties were realized via tin-doping.