Perovskite photoelectric detector for accelerating electron filtering

Abstract

The invention discloses a perovskite photoelectric detector for accelerating electron filtering. The perovskite photoelectric detector comprises a substrate, an anode, an active layer and a compound cathode, wherein a hole-transporting layer is arranged between the anode and the active layer and an electron filtering layer is arranged between the active layer and the compound cathode. According to the invention, a perovskite material, which is characterized by high migration rate, low exciton binding energy, longer exciton life and longer exciton diffusion length, is taken as the active layer of the photoelectric detector, so that the loss of heat exciton in the device is greatly reduced. A novel electron filtering layer is creatively provided; the electrons can be effectively transmitted to the cathode and then collected; the recombination probability of exciton and the quenching effect of electrode to exciton can be greatly reduced; the obtained perovskite photoelectric detector has higher external quantum efficiency and spectral responsivity; the performance is obviously promoted.

Description

technical field [0001] The invention belongs to the field of organic optoelectronics, relates to a novel photodetector, in particular to a perovskite photodetector with a high-efficiency filtering electronic structure. Background technique [0002] Organic photodetection devices have attracted extensive research interest due to their advantages such as low fabrication cost, wide range of material sources, light weight, flexibility, and easy integration with other optoelectronic devices. A large number of studies have proved that organic photodetectors have very broad application prospects in industry, agriculture and social life. In recent years, although the relevant scientific research has made great progress, the performance of the device has been greatly improved, but limited by some defects of the organic material itself and some problems in the structure design of the existing device, the performance of the device Ascension progress is slower. Therefore, the developm...

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Problems solved by technology

[0003] In terms of materials, conventional organic materials have some shortcomings: low carrier mobility, short exciton lifetime, short exciton diffusion distance, wide band gap, etc.

Because, although the electron transport layer material has high mobility, its exciton blocking ability is poor, and excitons are easily wasted through the layer through radiation and non-radiation complex forms and various quenching mechanisms; Although the barrier layer material has good exciton blocking function, its electron mobility is poor, which has a negative effect on electron transport.

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