Metamaterial Enhancement of Metal-Halide Perovskite Luminescence
Metamaterial Enhancement of Metal-Halide Perovskite Luminescence
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DOI：
10.1021/acs.nanolett.0c02571
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发表时间：
2020-11-11
期刊：
影响因子：
10.8
通讯作者：
Soci, Cesare
中科院分区：
文献类型：
--
作者：
Adamo, Giorgio;Krishnamoorthy, Harish Natarajan Swaha;Soci, Cesare
金属卤化物钙钛矿正迅速成为发光应用中可溶液加工的光学材料。在这里，我们采用等离子体超材料的方法来增强基于珀塞尔效应的甲基碘化铅铵（MAPbI（3））薄膜的光致发光发射和提取。我们表明，活性金属卤化物膜与金膜上雕刻的共振纳米级尺寸缝隙的杂交可以使发光强度增强1个数量级以上，并使发光寿命缩短近3倍，对应于超过300的珀塞尔增强因子。这些结果显示了共振纳米结构在可调光谱范围内控制金属卤化物钙钛矿发光特性的有效性，这是实现高效钙钛矿发光器件和单光子发射器的可行方法
Metal-halide perovskites are rapidly emerging as solution-processable optical materials for light-emitting applications. Here, we adopt a plasmonic metamaterial approach to enhance photoluminescence emission and extraction of methylammonium lead iodide (MAPbI(3)) thin films based on the Purcell effect. We show that hybridization of the active metal-halide film with resonant nanoscale sized slits carved into a gold film can yield more than 1 order of magnitude enhancement of luminescence intensity and nearly 3-fold reduction of luminescence lifetime corresponding to a Purcell enhancement factor of more than 300. These results show the effectiveness of resonant nanostructures in controlling metal-halide perovskite light emission properties over a tunable spectral range, a viable approach toward highly efficient perovskite light-emitting devices and single-photon emitters