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Article
Peer-Review Record

Exciton Manifolds in Highly Ambipolar Doped WS2

Nanomaterials 2022, 12(18), 3255; https://doi.org/10.3390/nano12183255
by David Otto Tiede 1,2, Nihit Saigal 1,2, Hossein Ostovar 1,2, Vera Döring 1,2, Hendrik Lambers 1,2 and Ursula Wurstbauer 1,2,*
Reviewer 1: Anonymous
Reviewer 2:
Reviewer 3: Anonymous
Nanomaterials 2022, 12(18), 3255; https://doi.org/10.3390/nano12183255
Submission received: 16 August 2022 / Revised: 9 September 2022 / Accepted: 13 September 2022 / Published: 19 September 2022
(This article belongs to the Special Issue Recent Advances in Optical Spectroscopy of Layered Materials)

Round 1

Reviewer 1 Report

Authors study the optical properties of WS2 flakes doped by ion-gating, an interesting topic for the development of optoelectronic devices. Here some key points missing in the manuscript that should be addressed:

-a photograph of the device is not shown, and it will help to have an idea of the devices’ dimensions and geometry, both relevant for the device performance.

-authors should indicate “power density values” in the experimental section.

-authors should explain the way they determine the charge carrier densities indicated in the manuscript, and therefore how they established the regimes. From the text, it seems that the values are taken from literature.

-PL4 fitting is not indicated in Figure 2, Reviewer supposes that it should be the grey line.

-authors should include a statement regarding reproducibility, since they just comment “minor variations are expected from sample to sample.” They can use the SI for including experimental data from other devices.

-check the spelling along the text, there are several typos such as “theses”

Author Response

Please see the attachment.

 

Author Response File: Author Response.pdf

Reviewer 2 Report

This paper discusses a establish an electrolyte gated WS2 monolayer field-effect structure, which can shift the Fermi level from the valence into the conduction band. They found that this field-effect platform is suitable for studying exciton manifold and combined optical and transport measurements on thin quantum materials at cryogenic temperatures. The characterization and the discussion are sufficient. However I question the novelty and fundamental difference from more literature.

1. In the experiment part, why 5nm chromium is selected as adhesion layer? Is this layer result in energy mismatch between Cr and the WS2?

2. Line 140~143, the author declares the hysteresis during measurement. How to reduce this hysteresis?

 

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

The comments for the manuscript are shown in a separate file. 

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Authors have addressed the comments from the Reviewers.

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