BROWSE

Related Scientist

CINAP's photo.

CINAP
나노구조물리 연구단
more info

ITEM VIEW & DOWNLOAD

Drift-dominant exciton funneling and trion conversion in 2D semiconductors on the nanogap

Cited 0 time in webofscience Cited 0 time in scopus
100 Viewed 0 Downloaded
Title
Drift-dominant exciton funneling and trion conversion in 2D semiconductors on the nanogap
Author(s)
Lee, Hyeongwoo; Koo, Yeonjeong; Choi, Jinseong; Kumar, Shailabh; Lee, Hyoung-Taek; Ji, Gangseon; Soo Ho Choi; Kang, Mingu; Ki Kang Kim; Park, Hyeong-Ryeol; Choo, Hyuck; Park, Kyoung-Duck
Publication Date
2022-02
Journal
Science advances, v.8, no.5
Publisher
NLM (Medline)
Abstract
© 2022 American Association for the Advancement of Science. Understanding and controlling the nanoscale transport of excitonic quasiparticles in atomically thin two-dimensional (2D) semiconductors are crucial to produce highly efficient nano-excitonic devices. Here, we present a nanogap device to selectively confine excitons or trions of 2D transition metal dichalcogenides at the nanoscale, facilitated by the drift-dominant exciton funneling into the strain-induced local spot. We investigate the spatiospectral characteristics of the funneled excitons in a WSe2 monolayer (ML) and converted trions in a MoS2 ML using hyperspectral tip-enhanced photoluminescence imaging with <15-nm spatial resolution. In addition, we dynamically control the exciton funneling and trion conversion rate by the gigapascal-scale tip pressure engineering. Through a drift-diffusion model, we confirm an exciton funneling efficiency of ∼25% with a significantly low strain threshold (∼0.1%), which sufficiently exceeds the efficiency of ∼3% in previous studies. This work provides a previously unexplored strategy to facilitate efficient exciton transport and trion conversion of 2D semiconductor devices.
URI
https://pr.ibs.re.kr/handle/8788114/11601
DOI
10.1126/sciadv.abm5236
ISSN
2375-2548
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse