Metal halide perovskite (MHP) materials have become a research hotspot in recent years due to their unique optical and electrical properties. In the process of preparing MHP materials into optoelectronic devices, patterning is often a key step. The ability to achieve high‐precision and high‐quality patterned films determines whether the corresponding high‐quality applications can be made. At present, there are a lot of patterning researches. Based on the classification of operation methods, this review divides the current MHP patterning methods into three categories: template patterning, inkjet printing patterning, and laser patterning, which describes the operation means, research status, pattern accuracy, method advantages, and future development prospect of each method in detail. This review provides a detailed reference for the research and application of MHP materials, and provides a method basis for future development.

LCD (TFT-LCD) improved this problem. [3] As a display technology that is lightweight and not inferior to CRT, it quickly replaced CRT and became one of the most mainstream displays on the market at that time. The characteristics of LCD still have the disadvantage of limited contrast and poor flexibility. In recent years, the most mature and comprehensive display technology in the market is organic light-emitting diode (OLED). [4] Compared with LCD, its self-luminous ability, transparency, true dark tone, and manufacturing flexibility are one of the highlights of OLED, and it has been widely used in the market. [5,6] The disadvantage is that it is technically difficult to make materials and control color stability, and at the same time, it has high cost, low yield, short lifespan, and

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Ultraviolet photodetectors (UV PDs) have always been the research focus of semiconductor optoelectronic devices due to their wide application fields and diverse compositions. As one of the best-known n-type metal oxides in third-generation semiconductor electronic devices, ZnO nanostructures and their assembly with other materials have received extensive research. In this paper, the research progress of different types of ZnO UV PDs is reviewed, and the effects of different nanostructures on ZnO UV PDs are summarized in detail. In addition, physical effects such as piezoelectric photoelectric effect, pyroelectric effect, and three ways of heterojunction, noble metal local surface plasmon resonance enhancement and formation of ternary metal oxides on the performance of ZnO UV PDs were also investigated. The applications of these PDs in UV sensing, wearable devices, and optical communication are displayed. Finally, the possible opportunities and challenges for the future development of ZnO UV PDs are prospected.

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