Strained Bubbles in van der Waals Heterostructures as Local Emitters of Photoluminescence with Adjustable Wavelength

By A. Tyurnina, D. Bandurin, E. Khestanova, V. Kravets, M. Koperski, Francisco Guinea, A. Grigorenko, A.K. Geim, I. Grigorieva. ACS Photonics, 2019

146 citations recorded by the source corpus.

The possibility to tailor photoluminescence (PL) of monolayer transition metal dichalcogenides (TMDCs) using external factors such as strain, doping, and external environment is of significant interest for optoelectronic applications. Strain in particular can be exploited as a means to continuously vary the band gap. Micrometer-scale strain gradients were proposed for creating “artificial atoms” that can utilize the so-called exciton funneling effect and work, for example, as exciton condensers. Here we describe room-temperature PL emitters that naturally occur whenever monolayer TMDC is deposited on an atomically flat substrate. These are hydrocarbon-filled bubbles, which provide predictable, localized PL from well-separated sub-micrometer areas. Their emission energy is determined by the built-in strain controlled only by the substrate material, such that both the maximum strain and the strain profile are universal for all bubbles on a given substrate, i.e., independent of the bubble size. We show that ...

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/612729b7b813a9ba41decb9ea16a76887713478d

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Materials Chemistry

  1. Yujia Chen
  2. Shengxue Yang
  3. Chengbao Jiang

Citations in the corpus