Welcome to my Projects Page!
The following project was done during my Master's course at IIT Kharagpur.
(I) Broadband Photodetection With Liquid-Phase Synthesized Few-Layer Tungsten Disulfide/Si Mix-Dimensional Vertical Heterojunction
Two-dimensional (2D) materials-based optoelectronic devices are more efficient compared to traditional semiconductors owing to their exciting layer-dependent optical and electronic properties. The compatibility of the 2D materials with the standard Si complementary metal oxide semiconductor (CMOS) technology makes them promising for use in next-generation integrated circuits. Here we report broadband photodetection using solution-processed few-layer tungsten disulfide (WS2)/Si 2D/3D vertical heterojunction. WS2 nanoflakes have been prepared through a simple sonochemical exfoliation process using N, N,- Dimethylformamide (DMF) as solvent. Various spectroscopic analyses confirm the exfoliation of bulk WS2 to 2D nanoflakes. Few-layer WS2/Si mix-dimensional vertical heterojunction photodiode shows a good rectification ratio of ~10^3 at 5V bias. Upon irradiation with broadband white light, the photodiode shows good photoresponse with a photo-to-dark current ratio ~10^3 at -5V bias. The stable photoresponse from such a simple device architecture is very much promising for potential applications.
The following project was done during my Bachelor's course at Midnapore College.
(II) Determination of Energy Band Gap Value of Silicon by Means of UV-Vis-NIR Spectroscopy