GIST Scholar
College of Engineering
Department of Materials Science and Engineering
1. Journal Articles
Spectrally decoupled, signal-boosted photodetection via vertical 2D/3D heterointegration for non-invasive biosignal monitoring
- Type
- Article
- Citation
- eScience
- Issued Date
- ACCEPT
- Abstract
- Heterogeneously integrated photodetectors (PDs) offer a promising platform for non-invasive biosensing, yet existing organic systems often struggle with spectral crosstalk and reliability issues. Here, we report a spectrally decoupled, 2D/3D inorganic heterointegrated PD (HI-PD) platform realized by vertically stacking WS2/MoS2 monolayers onto a silicon (Si) PD. The interface-driven modulation achieves a staggered Type-II band alignment, boosting the photocurrent by 982% compared to monolayer MoS2. The vertically integrated HI-PD enables precise multispectral detection by selectively absorbing red light in the top TMD layer while allowing infrared (IR) light to reach the underlying Si-PD. This system exhibits an exceptional signal-to-noise ratio (SNR) of 14.5 dB for red light (a 221% increase over conventional Si-PDs) and a 23-fold higher SNRarea than previously reported PDs. We successfully demonstrate real-time monitoring of heart rate and blood oxygen saturation (SpO2), providing a scalable van der Waals heterostructure paradigm for next-generation personalized healthcare.
- Publisher
- KeAi Communications Co. Ltd.
- ISSN
- 2097-2431
- Appears in Collections:
- Department of Materials Science and Engineering > 1. Journal Articles
- 파일 목록
-
-
관련 파일이 존재하지 않습니다.
-
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.