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钙钛矿量子点的原位制备及其全息显示屏应用
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Abstract:
近年来，卤化钙钛矿因其在光电领域中的优异性能在光伏、发光二极管、激光器和光电探测器等前沿领域中有广泛的应用。本文将CsPbI3钙钛矿前驱体与聚丙烯腈聚合物混合后旋涂成膜，100℃下经过不同时间的退火处理，原位生成了钙钛矿量子点薄膜，测试了其荧光强度随时间的变化。结果表明，厚度为1.7 μm的钙钛矿量子点薄膜在120 min的退火时间下，其荧光特性最佳，达到最高荧光强度和最窄半高宽，并验证了其优异的荧光稳定性。在此基础上，将携带“USST”字母信息的全息图输入空间光调制器，将量子点薄膜置于原先用于采集光信号的CCD相机位置进行测试，成功实现了目标信息的成像，验证了钙钛矿量子点薄膜在全息显示方面的应用潜力。本研究利用钙钛矿量子点的光致发光成像代替了传统CCD相机的光电转换过程，为相关领域的进一步研究提供了新思路。
In recent years, halide perovskites have demonstrated extensive applications in cutting-edge fields such as photovoltaics, light-emitting diodes, lasers, and photodetectors due to their exceptional optoelectronic properties. In this study, we mixed CsPbI3 perovskite precursor with polyacrylonitrile and spin-coated composite thin film. Through annealing treatments at 100？C for varying durations, in-situ fabrication of perovskite quantum dot in polymer matrix was achieved, and the fluorescence intensity variations over time were systematically characterized. The results revealed that PQD films with a thickness of 1.7 μm exhibited optimal fluorescence performance after 120 min of annealing, achieving the highest fluorescence intensity and narrowest full width at half maximum, while confirming excellent fluorescence stability. Based on these results, a holographic pattern encoding the letters “USST” was input into a spatial light modulator. The PQD film was then positioned at the location previously occupied by the CCD camera for light signal acquisition. The target information was successfully imaged, confirming the potential of PQD films for holographic display applications. This work replaces the traditional photoelectric conversion process of CCD cameras with photoluminescence imaging of perovskite quantum dots, providing novel pathways for related fields.
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