  Two-dimensional (2D) materials, such as graphene, transition metal
dichalcogenides (TMDs), black phosphorus (BP) and related derivatives, have
attracted great attention due to their advantages of flexibility, strong
light-matter interaction, broadband absorption and high carrier mobility, and
have become a powerful contender for next-generation infrared photodetectors.
However, since the thickness of two-dimensional materials is on the order of
nanometers, the absorption of two-dimensional materials is very weak, which
limits the detection performance of 2D materials-based infrared photodetector.
In order to solve this problem, scientific researchers have tried to use
optimized device structures to combine with two-dimensional materials for
improving the performance of infrared photodetector. In this review, we review
the progress of room temperature infrared photodetectors with hybrid structure
based on 2D materials in recent years, focusing mainly on 2D-nD (n = 0, 1, 2)
heterostructures, the integration between 2D materials and on-chip or plasmonic
structure. Finally, we summarize the current challenges and point out the
future development direction.
