期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 126, 期 49, 页码 21126-21135出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.2c07306
关键词
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资金
- National Natural Science Foundations of China [11874200]
- National Key R&D Program of China [2016YFA0201104]
- Top -Notch Young Talents Program of China
- Dengfeng Project B of Nanjing University
- Open Fund of Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education [INMD-2020M06]
Organic-inorganic hybrid materials have the potential to be modified easily, allowing for the construction of multifunctional ferroelectrics and their application in various fields. In this study, a room-temperature ferroelectric material was designed and synthesized by incorporating a photoluminescent molecule. Experimental results confirmed a reversible ferroelectric-paraelectric phase transition at a specific temperature. The material exhibited both ferroelectricity and photoluminescence, suggesting its potential for applications in lighting sensors, memory devices, and other multifunctional applications.
Organic-inorganic hybrid materials are easy to modify, which makes it possible to construct multifunctional ferroelectrics directionally and apply the built-in electric field and switching properties of ferroelectrics to multi-disciplinary fields. Particularly, the coupling of photoluminescence and ferroelectricity in a single hybrid material facilitates its novel applications in lighting sensors, memory devices, and other multifunctional applications. Based on the photoluminescent molecule 4-(2-aminoethyl) morpholine (AEM), here, a room-temperature ferroelectric (C6H16N2O)CdBr4 center dot H2O (AEM-CdBr4) is de-signed and obtained, which crystallizes in a polar orthorhombic space group of Pca21. A reversible ferroelectric-paraelectric phase transition was confirmed at 353 K through experimental results, such as differential scanning calorimetry (DSC) curves, variable-temperature Raman spectroscopy, and photoluminescence (PL) spectroscopy. The crystal exhibits ferroelectricity at room temperature with a saturation polarization of approximately 8 mu C/cm2. The photoluminescence of compound AEM-CdBr4 is mainly derived from the monomeric fluorescence emission of the AEM molecule and is not directly related to the energy band structure of the crystal. This room-temperature molecular-type ferroelectric AEM-CdBr4 with photoluminescence will provide new ideas for the design of new multifunctional ferroelectrics.
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