Recent progress and strategies in photodetectors based on 2D inorganic/organic heterostructures

Abstract Two-dimensional (2D) inorganic/organic heterostructures have attracted great attention in the field of optoelectronics due to their unique properties. Comparing with purity organic semiconductors or 2D inorganic heterostructures, the 2D inorganic/organic heterostructure overwhelms the current limitations of photodetectors and provides more opportunities for the optoelectronic field. However, no in-depth reviews on the important progresses, challenges, and optimizing strategies of performance of photodetectors based on 2D inorganic/organic heterostructures are found in literatures to date. Herein, this report firstly introduces unique features of 2D inorganic/organic heterostructures. Then, we sum up the main growing methods according to the technological principle, and the main properties of photodetectors, and summarize the progresses of photodetectors of 2D inorganic-organic heterostructures based on different physical mechanisms (mainly as photovoltaic effect and photoconductive effect). More importantly, this report presents some design strategies for optimizing photodetector performance of 2D inorganic-organic heterostructures, especially introducing 2D organic ultrathin film design strategy. Furthermore, future challenges and opportunities of 2D inorganic-organic heterostructures are highlighted.