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Perovskite film layer, device and preparation method for effectively improving efficiency of light-emitting device
Perovskite film layer, device and preparation method for effectively improving efficiency of light-emitting device
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机译:钙钛矿薄膜层,装置及其有效提高发光装置效率的制备方法
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摘要
The disclosure discloses a perovskite film layer, a device and a preparation method for effectively improving the efficiency of perovskite optoelectronics. The perovskite film layer consists of a layer with discontinuous, irregularly distributed perovskite crystal grains and an organic insulating layer with a low refractive index embedded between the perovskite crystal grains. The perovskite crystal grains form a plurality of convex portions, and the organic insulating layer forms a plurality of concave portions between the convex portions. By adding an excess of an alkylammonium salt and/or an organic molecule with a specific functional group to perovskite precursor solution, a concave-convex film layer structure is spontaneously formed, and an upper charge transport layer and an electrode form pleated concave-convex structures. Such a special perovskite thin film structure formed by a simple solution method can effectively improve the light-outcoupling efficiency and enhance the performance of the perovskite light-emitting device.
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