Advances in solution-processed quantum dots based hybrid structures for infrared photodetector

Infrared photodetector based on solution-processed colloidal quantum dots (QDs), which possess the special properties of wide-size-tunable bandgap, high quantum confinement potential and low-cost fabrication, have been employed successfully as a viable technological proposal for optical communication, biological imaging, night vision, surveillance, and remote sensing. However, QDs-based photodetector always fails to demonstrate excellent infrared photodetection performance because of low value of carrier mobility. Fortunately, QDs solutions can be easily deposited on various substrates, including 2D materials, film materials or other QDs, and these QDs-based hybrid structures can be engineered to achieve high mobility and light absorbance simultaneously through synergistic effect between QDs and other materials. Herein, we focus on how QDs-based hybrid structure developments have effectively facilitated the performance of infrared photodetectors enhancements, including three main types of QDs-based hybrid structure, optimization of infrared photodetector performance and integrated circuit engineering. Finally, we systematically summarize the current challenges and future development of infrared photodetector based on QDs and its hybrid structure.