功能配位杂化金属卤化物材料的合成及其光学性能研究

金属卤化物钙钛矿 ABX₃（A 位和 B 位为阳离子，X 位为卤素阴离子）因其具有易于调节的能隙、高的吸收系数和高载流子迁移率等特性，在光电领域展现出广阔的应用前景。在三维金属卤化物钙钛矿中，通常存在稳定性较差的问题，使其在很多领域的应用受限，通过调整化合物的组分及结构以获得期望的性能与实际应用价值成为了很多科研人员的目标。可以向体系中引入较大尺寸的有机组分取代 A 位阳离子，实现对材料维度的调整。选用具有手性的有机阳离子或配体，通过将其引入金属卤化物体系中有望赋予材料独特的手性特性。替换 B 位金属阳离子的种类，例如引入过渡金属，可以制备对环境更友好的杂化金属卤化物。本论文基于以上可调控化合物结构和性能的策略，制备了四对具有强烈圆偏振发射的手性杂化碘化亚铜化合物和一系列具有一维、三维结构的双钙钛矿衍生物材料。由于手性有机配体的配位数和配位位置的不同，导致手性杂化碘化亚铜化合物的晶体结构和发光性能都有很大差异，单齿配体与 Cu 配位形成零维结构，双齿配体与 Cu 配位形成三维结构，光致发光量子产率最高可达 93-95%，通过改变手性双齿配体的类型，同时实现了圆偏振发光和可调节孔隙的结合。探索了双钙钛矿衍生物各组分改变对材料结构和性能的影响，并通过离子掺杂策略大幅提升了 In 基材料的光学性能，揭示了该体系中直接带隙半导体和间接带隙半导体对 Sb³⁺掺杂策略响应的差异性。

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