[H-5] Device Application II: Low Dimensional Devices and Materials

[H-5-03] [No Show] Improved Spectral Range and Responsivity with Mixed Dimensional (0D WS₂ QDs/ 2D MoS₂) Broadband Photodetector

〇Parikshit Sahatiya¹, Venkatarao Selamneni¹, Chandra Sekhar Reddy Kolli ¹ (1. BITS pilani, Hyderabad campus (India))

Presentation style:

Mixed dimensional heterostructures are gaining a lot of attention to increase the spectral range of the photo-detector. In this work, high-performance broadband (UV-visible) photodetector was demonstrated by dec-orating zero-dimensional (0D) WS2-QDs on two-dimensional (2D) monolayer MoS2. WS2-QDs have absorbance in UV range and MoS2 is sensitive to visi-ble light. By proper contact engineering and discrete distribution of WS2 QDs over monolayer MoS2, the spectral range of MoS2 have been increased towards UV. The maximum responsivity was found to be ~ 392 A/W at 554 nm wavelength. In this report, not only the photodetection range is increased but also responsivity is improved which is a major step in the development of next-generation optoelectronics.