Enhanced UV–Vis photodetector performance by optimizing interfacial charge transportation in the heterostructure by SnS and SnSe2

Two dimensional NbSe2/Nb2O5 metal–semiconductor heterostructure-based photoelectrochemical photodetector with fast response and high flexibility

“…After the formation of the Nb 2 O 5 /NbSe 2 heterostructure, the binding energy of the O 1s peak has a relative shift towards higher binding energy. These shifts can be explained by the efficient charge transfer from Nb 2 O 5 to Nb 2 Se 5 , which is also found in 2D Bi 2 S 3 /ReS 2 , 38 SnSe 2 /SnSe 39 and SnS/SnSe 2 40 heterostructures.…”

“…8a). The NbSe 2 /Nb 2 O 5 shows a higher photoresponsivity at 380 nm, and the value reaches 23.84 mA W À1 , which is larger than those of 2D materials such as SnS/SnSe 2 , 40 Te/Se, 56 and Nb 2 C. 31 We also extract the I ph and R ph (Fig. 8b) and these values gradually decrease with the wavelength due to the decreased photon absorption as depicted in the UV-Vis spectra (Fig.…”

Elemental doping inhibits surface-state-mediated charge carrier trapping for promoting photocatalytic selective oxidation

“…S11 †), leading to an unexpected energy level mismatch with respect to ITO glass. [25][26][27] To go further, XANES measurements under light and dark conditions were carried out to gain insights into the mechanism of suppressing charge carrier trapping by vanadium doping. As displayed in Fig.…”

Bi2Te3/Bi2Se3/Bi2S3 Cascade Heterostructure for Fast‐Response and High‐Photoresponsivity Photodetector and High‐Efficiency Water Splitting with a Small Bias Voltage

“…It is evident that the R ph value of the cascade heterostructure is approximately 10 3 times larger than those of 2D GeSe and SnS [ 1b,36 ] and ≈10 2 times larger than those of 2D SnS/SnSe 2 and Te@Se heterostructures. [ 37 ] This is mainly determined by the strong light absorption ability, well‐matched band alignment, and specific atomic‐level interfacial contact in the Bi 2 Te 3 /Bi 2 Se 3 /Bi 2 S 3 cascade heterostructure. The superior photoresponse performance of the cascade heterostructure suggests a great commercial potential in the visible‐light‐driven PEC photodetectors.…”