2022 International Conference on Solid State Devices and Materials

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Oral Presentation

08: Low Dimensional Devices and Materials

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

2022年9月28日(水) 10:45 〜 11:45 302 (3F)

Session Chair: Shu Nakaharai (NIMS), Takeshi Yanagida (Univ. of Tokyo)

11:30 〜 11:45

[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.

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