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Boosting Phototransistor Performance in Monolayer TMDs via Multiple Reflections from DBR

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Title
Boosting Phototransistor Performance in Monolayer TMDs via Multiple Reflections from DBR
Author(s)
Ashok Mondal; Chandan Biswas; Young Hee Lee
Publication Date
2023-01
Journal
ACS Omega, v.8, no.1, pp.1677 - 1682
Publisher
ACS Publications
Abstract
Copyright © 2023 American Chemical Society.Transition-metal dichalcogenides (TMDs) are intensively studied for high-performance phototransistors. However, the device performance is limited by the single photoexcitation. Here, we show a unique strategy in which phototransistor performance can be boosted by fabricating the device on top of a distributed Bragg reflector (DBR). Monolayer molybdenum disulfide (MoS2) and tungsten disulfide (WS2) phototransistors were fabricated on DBR and SiO2 substrates for comparison. Furthermore, phototransistor performances including photocurrent, responsivity, photoinduced mobility, and subthreshold swing highlight 582 times enhancement in photoresponsivity ratio and 350 times enhancement in photocurrent ratio in the DBR sample using transparent graphene electrode and hBN encapsulation.
URI
https://pr.ibs.re.kr/handle/8788114/12447
DOI
10.1021/acsomega.2c07518
ISSN
2470-1343
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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