论文标题
金属 - 甲基钙钛矿发光的超材料增强
Metamaterial enhancement of metal-halide perovskite luminescence
论文作者
论文摘要
金属 - 卤化物钙钛矿正在迅速作为用于发光应用的可溶液处理光学材料。在这里，我们采用了基于purcell效应的等离子超材料方法来增强光致发光发射和提取甲基铵碘化物（MAPBI3）薄膜。我们表明，将活性金属丝膜与雕刻成黄金膜的谐振纳米尺寸缝隙的杂交可以产生一个以上的发光强度增强的数量级，并且发光寿命的降低近三倍。这显示了共振纳米结构在可调频谱范围内控制金属甲基钙钛矿光发射特性方面的有效性，这是一种可行的方法，用于高效的钙钛矿光发射器件和单光子发射器。
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 (MAPbI3) 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 one order of magnitude enhancement of luminescence intensity, and nearly threefold reduction of luminescence lifetime. This shows 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.
