A novel photodetector based on perovskite and a manufacturing method thereof

Abstract

The invention provides a novel photodetector based on perovskite and a manufacturing method thereof. A novel photodetector with a vertical structure is fabricated by sequentially arranging a first electrode, a hole transport layer, a photosensitive active layer containing perovskite, an electron transport layer and a second electrode on the substrate from bottom to top. The photosensitive active layer is a novel perovskite with a two-dimensional perovskite and a three-dimensional perovskite cross network structure produced by adding a halide salt and an organic solvent into a two-dimensional perovskite precursor solution. The two-dimensional perovskite and the three-dimensional perovskite cross network structure increase the crystallinity of the novel perovskite, Carrie lifetime prolongation, Moreover, the novel perovskite possesses the characteristics of both in-plane and inter-plane transport of carriers, and the novel photodetector containing the novel perovskite possesses larger photocurrent and higher photoresponse, and exhibits excellent air stability and long-term cycling stability.

Description

technical field [0001] The invention relates to the field of photoelectric detection, in particular to a novel photodetector based on perovskite and a manufacturing method thereof. Background technique [0002] At present, perovskite materials are more and more widely used in the field of photoelectric detection. The more commonly used perovskites include perovskites with two-dimensional or three-dimensional structures. Two-dimensional perovskites have a special two-dimensional planar structure. It has good room temperature stability, and the two-dimensional perovskite has low driving voltage and efficient exciton separation characteristics, making it of high value in the field of photodetection, but the carriers in the two-dimensional perovskite The transmission is more inclined to intralayer transmission, and the probability of interlayer transmission is lower, making two-dimensional perovskites more commonly used in photodetectors with horizontal structures; compared with...

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Problems solved by technology

[0002] At present, perovskite materials are more and more widely used in the field of photoelectric detection. The more commonly used perovskites include perovskites with two-dimensional or three-dimensional structures. Two-dimensional perovskites have a special two-dimensional planar structure. It has good room temperature stability, and the two-dimensional perovskite has low driving voltage and high-efficiency exciton separation characteristics, making it of high value in the field of photodetection, but the carriers in the two-dimensional perovskite The transmission is more inclined to intralayer transmission, and the probability of interlayer transmission is lower, making two-dimensional perovskites more commonly used in photodetectors with horizontal structures; compared with two-dimensional perovskites, carriers in three-dimensional perovskites The transport in is more inclined to interlayer transport, and the three-dimensional perovskite has a high photoelectric conversion efficiency, but the air stability of the three-dimensional perovskite is poor

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