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 commu-nication, 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.

Automated summary

Infrared photodetector based on solution-processed colloidal quantum dots (QDs) has been successfully used in various applications due to its wide-size-tunable bandgap, high quantum confinement potential, and low-cost fabrication. However, the performance of QDs-based photodetectors is limited by low carrier mobility. By depositing QDs solutions on different substrates, such as 2D materials or other QDs, hybrid structures can be engineered to achieve high mobility and light absorbance through synergistic effects. This article focuses on the developments of QDs-based hybrid structures in enhancing the performance of infrared photodetectors and summarizes the current challenges and future development.