02419nas a2200265   4500008004100000245014000041210006900181260000900250300001600259490000600275520156400281653000701845653000801852653001901860653001801879653000901897653000801906100001601914700001801930700001901948700001801967700001901985700001902004856013002023       2025                        eng d00aWS2 nanoparticle-decorated, vertically aligned SnS2-based high-performance heterostructures for ambient-stable ultrafast photodetection0 aWS2 nanoparticledecorated vertically aligned SnS2based highperfo  cOCT   a21047-210560 v83 a<p>
	The development of visible-light photodetectors with high responsivity, rapid response, and long-term ambient stability remains a critical challenge in optoelectronics. Here, we report a high-performance photodetector based on a vertically aligned SnS2 film interfaced with WS2 nanoparticles, forming a p-n heterojunction. This device is fabricated using a scalable two-step method-chemical vapor deposition (CVD) for SnS2 growth and solution-based drop-casting for WS2 deposition-enabling precise control over the heterointerface, but trap states are inevitable due to the use of thermal CVD and the drop-casting method. The resulting photodetector exhibits remarkable optoelectronic characteristics, including a responsivity of 0.76 A/W, a detectivity of 7.56 x 10(11) Jones, a photo-to-dark current ratio of 119, and a fast rise time of 0.297 ms under visible illumination. These performance metrics are directly attributed to the optimized heterointerface, where the built-in electric field at the nanoscale WS2/SnS2 junctions promotes efficient charge separation and minimizes recombination losses. Notably, the device retains over 95% of its initial performance even after 1 week of ambient exposure, highlighting its superior environmental robustness. This work introduces an interface-engineering strategy that leverages the unique electronic properties of earth-abundant, nontoxic two-dimensional materials, offering a viable pathway for scalable, high-speed, and stable photodetectors suitable for next-generation optoelectronic systems.</p>
10a2D10aCVD10aheterojunction10aphotodetector10aSnS210aWS21 aDas, Chayan1 aKumar, Suresh1 aSharma, Anjali1 aKumar, Mahesh1 aRath, Arup, K.1 aSahu, Satyajit  uhttps://library.ncl.res.in/content/ws2-nanoparticle-decorated-vertically-aligned-sns2-based-high-performance-heterostructures