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The emerging flexible device technologies have fascinated the modern optoelectronic industry owing to their invincible properties such as wearable, stretchable, smart, energy‐efficient, scalability, cost‐effective, and high performance. However, there is still room for improvements such as performance, reliability, and mass production. This research work fabricates laser‐induced graphene (LIG) interdigitated electrodes based on flexible UV photodetectors over polyimide substrate, using solution‐processed tungsten oxide (WO3) thin film as photoactive material. The best device performance is achieved through the optimization of laser power for the deposition of LIG, as well as a different solvent for WO3. The device shows excellent photoresponsivity, external quantum efficiency, and specific detectivity of 500 mA W−1, 164%, and 3.09 × 1012 Jones, respectively. Moreover, a fast response time, such as 0.3 ms for 375 nm light, is observed. This study offers a comprehensive elucidation of the intricate process through which photoelectrons are moved toward WO3 facilitated by the electric field present at the interface of the LIG and WO3. [ABSTRACT FROM AUTHOR]

Empirical accounting is a relatively new course. It was first produced in the United States in the 1960s. After years of research and development, a relatively complete theoretical system has been formed. Empirical accounting teaching is a new content of accounting higher education in our country, which plays an important role in popularizing and improving the empirical study of accounting in our country. After investigating and analysing the empirical accounting teaching in most colleges in my country, this paper summarizes and analyzes the current status of empirical accounting teaching and discusses the optimization measures of its empirical accounting teaching mode based on the Internet of Things and deep learning. The experimental results show that this method can effectively improve students' learning efficiency and teachers' teaching satisfaction. [ABSTRACT FROM AUTHOR]

PbS colloidal quantum dots (CQDs) are commonly used for infrared photodetectors due to their broad absorption range in the infrared region, size-dependent behavior, facile solution-synthesis processing and excellent optoelectronic properties. However, the conventional hot-injection method used to synthesize PbS CQDs is still complicated, and the device performance of pure PbS CQD photodetectors is not always very high due to the large density of surface states and the low mobility of the PbS CQD layer. In this paper, a 'one-step' method was firstly used to synthesize PbS CQDs capped with the short-chain ligand I (i.e., PbS-I), and then these were blended with an all-inorganic perovskite CsPbBr3 precursor as the active layer via a facile solution process, thus high-performance photodetectors of Si/PbS:CsPbBr3/Ag on a silicon wafer substrate were obtained after optimizing the volume ratio of PbS to the CsPbBr3 precursor, and the underlying physical mechanism is believed to involve the surface passivation and the heightened carrier injection barrier, which is raised by the blending with CsPbBr3. As a result, a maximum responsivity of 12.97 A W−1 with a specific detectivity of 2.33 × 1012 Jones under 4.8 μW cm−2 980 nm illumination at −1 V was obtained, as well as a responsivity of 4.38 A W−1 with a specific detectivity of 1.43 × 1013 Jones in the self-driven mode. [ABSTRACT FROM AUTHOR]