Yang Han-Jiang, Li Bingxuan, Wang Jin-Yun, Xu Liang-Jin, Chen Zhong-Ning
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China.
Nano Lett. 2024 Aug 7;24(31):9569-9574. doi: 10.1021/acs.nanolett.4c02125. Epub 2024 Jul 29.
Chiral 3D perovskites pose challenges compared to lower-dimensional variants due to limited chiral organic cation options. Here, we present a universal and controlled method for synthesizing chiral 3D lead halide perovskites using organic amines or alcohols as chiral templates. Introducing these templates to PbCl in ,-dimethylformamide (DMF) under acidic conditions induces the crystallization of R/S [DMA]PbCl (DMA = dimethylamine). The resulting structure aligns with the templates used, stemming from the helical PbCl chain as verified by single-crystal X-ray diffraction. Furthermore, the chiral perovskite exhibits absorption and circular dichroism (CD) signals in the high-energy band, enabling the circularly polarized light (CPL) detection in the UV spectrum. A CPL detector constructed by this chiral perovskite demonstrates excellent performance, boasting an anisotropy factor for photocurrent () of 0.296. Our work not only introduces a novel and controllable method for crafting chiral perovskites but also opens new avenues for circularly polarized light detection.
由于手性有机阳离子的选择有限，与低维变体相比，手性三维钙钛矿面临着挑战。在此，我们提出了一种通用且可控的方法，以有机胺或醇为手性模板合成手性三维卤化铅钙钛矿。在酸性条件下，将这些模板引入到N，N-二甲基甲酰胺（DMF）中的PbCl₂中，会诱导R/S [DMA]PbCl₃（DMA =二甲胺）的结晶。所得结构与所使用的模板一致，这源于单晶X射线衍射验证的螺旋状PbCl链。此外，手性钙钛矿在高能带中表现出吸收和圆二色性（CD）信号，从而能够在紫外光谱中检测圆偏振光（CPL）。由这种手性钙钛矿构建的CPL探测器表现出优异的性能，其光电流的各向异性因子（glum）为0.296。我们的工作不仅引入了一种新颖且可控的方法来制备手性钙钛矿，还为圆偏振光检测开辟了新途径。
