Twisted MoSe2 Homobilayer Behaving as a Heterobilayer
arxiv(2024)
摘要
Heterostructures (HSs) formed by the transition-metal dichalcogenides (TMDCs)
materials have shown great promise in next-generation opto/electronic and
photonic applications. An artificially twisted HS, allows us to manipulate the
optical, and electronic properties. With this work, we introduce the
understanding of the complex energy transfer (ET) process governed by the
dipolar interaction in a twisted molybdenum diselenide (MoSe2) homobilayer
without any charge-blocking interlayer. We fabricated an unconventional
homobilayer (i.e., HS) with a large twist angle by combining the chemical vapor
deposition (CVD) and mechanical exfoliation (Exf.) techniques to fully exploit
the lattice parameters mismatch and indirect/direct (CVD/Exf.) bandgap nature.
This effectively weaken the charge transfer (CT) process and allows the ET
process to take over the carrier recombination channels. We utilize a series of
optical and electron spectroscopy techniques complementing by the density
functional theory calculations, to describe a massive photoluminescence
enhancement from the HS area due to an efficient ET process. Our results show
that the electronically decoupled MoSe2 homobilayer is coupled by the ET
process, mimicking a 'true' heterobilayer nature.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要