Space‐Confined Growth of 2D InI Showing High Sensitivity in Photodetection

Abstract

Layered InI has a great potential in optoelectronic applications due to its direct wide tunable bandgap. However, there is no single report about its 2D synthesis. Here, the growth of high‐quality and ultrathin InI flake (as thin as 8 nm) is reported via space‐confined physical vapor deposition. Impressively, an InI flake‐based photodetector exhibits an ultralow off‐state current of ≈4.2 × 10−12 A, high on/off photocurrent ratio of 104, excellent detectivity of 4.2 × 1012 Jones, a high‐speed response time of 10 ms, as well as excellent effective quantum efficiency of 1600%, suggesting its promising applications in optoelectronics.

2D Re‐Based Transition Metal Chalcogenides: Progress, Challenges, and Opportunities

“…Owing to the simplicity and effectivity, the space-confined CVD growth approach has been widely utilized to controllably synthesize large-area monolayer ReSe 2 film and other 2D TMDs materials. [104][105][106][107] Besides the above works, Zhang's group reported the synthesis of ReSe 2 with high crystal quality on gold foil substrate, which provides the convenience for in-situ studying their electrical properties by using scanning tunneling microscope (STM). [108][109][110][111] Lee and coworkers prepared high uniformity and continuity ReS 2 film on the transparent flexible glasses at a relatively low temperature.…”

“…Owing to the simplicity and effectivity, the space‐confined CVD growth approach has been widely utilized to controllably synthesize large‐area monolayer ReSe 2 film and other 2D TMDs materials. [ 104–107 ]…”

Shedding light on the energy applications of emerging 2D hybrid organic-inorganic halide perovskites

“…The vapor method includes diverse and versatile deposition techniques, namely, the chemical vapor deposition (CVD), and van der Waals epitaxy is one of the most widely explored approach for other 2D materials such as grapheme (Lang et al, 2015;Wang et al, 2011), transition metal dichalcogenides (TMDs) (Jiang et al, 2017;Qi et al, 2017;Suleiman et al, 2020;Zhang et al, 2019b), and 2D transition-metal carbides/nitrides, and carbonitrides (MXenes) (Xu et al, 2015). It is also applied in the growth of perovskite thin films (Lewis and O'Brien, 2014;Leyden et al, 2014).…”

Low-Temperature Induced Enhancement of Photoelectric Performance in Semiconducting Nanomaterials

“…Thus, the variable hopping mechanism, assisted by single acoustic phonons, is suitable for low temperature. There are a handful of experiments that evidenced this conduction-temperature model as accounting for temperature-dependent sensing performance, such as HgTe QDs [ 133 ], PbS/polystyrene nanocomposite [ 77 ], boron sheet [ 87 ], InI [ 134 ] and monolayer graphene [ 79 ]. What deserves notification are conduction changes raised by phase transition, which needs to be analyzed based on specific situations.…”