Electrical transport and photoconductivity in pulsed dc sputtered WSe₂ thin film^*

2D-layered materials exhibiting interesting electronic transport are potential candidates for the field of spintronics [1]. We report thin film growth of transition metal dichalcogenide (TMD) WSe₂ using the pulsed dc sputtering technique. The electronic transport properties of Hall patterned WSe₂ thin films are studied as a function of temperature and magnetic field. The sample shows semiconducting behaviour with holes as a majority charge carrier. We use interdigitated electrodes to measure the photo-response of WSe₂ film by using infrared, green and blue lasers. The gate-tuning of the photo-response is also observed to realize WSe₂-based phototransistor. Our study may have strong implications in the development of the field of 2D TMD-based devices.