Silicon Meets Graphene for a New Family of Near-Infrared Schottky Photodetectors

Round 1

Reviewer 1 Report

In this review article, the author realize a summarized theoretical study of the graphene applications to near-infrared photodetectors using Schottky-junction structure devices which are based on the internal photoemission effect (IPE). I find the entire manuscript technically correct. I also admit that this manuscript can be useful to the scientific community on the subject. However, I find some items that the author should carefully address before publication. These are collected next.

1.(All equations). There are type-error in all equations, so they cannot be correctly seen. Correct them.

2.(Figure 2). Meaning of the conic surface represented in the Fig. should be explained in the text. I think it's related with the maximum solid angle of incidence of photons on the photosensitive surface of photo-detector to produce IPE, but if this is not the case, then it should be explicitly explained.

3.(Line 88). In my opinion it should say "...the number of charge carriers generated by the PD..." instead of  "...the number of charge carriers collected by the PD...".

4.(Line 132). There is a type-error: it should say "...involving 2D materials...", instead of "...involving 3D materials...".

5.(Line 171). Idem: 'Fig. 5(a)', instead of 'Fig. 7(a)'.

6.(Line 178). Idem, id.: '3 μA', instead of '3 μm'.

7.(Line 184). Idem, id.: 'PSD (Power-Spectral-Density)', instead of unknown 'NEP'. Otherwise, explain it.

8.(Line 185). Idem, id.: 'and', instead of 'amd'.

9.(Line 198). It should be removed '(0.25 A/W)'.

10.(Figure 7). 'Ref. [40]', instead of 'Ref. 40'.

11.(Line 211). Word 'efficiency' was omitted, when necessary, i.e., 'external quantum efficiency'.

12.(Table 1). Third and fourth registers (over Dark current field): first 'at' word should be removed. Last register (over Ref. field): according with above text, it should be 'Ref. [30]', instead of 'Ref. [42]'.

Author Response

Reply is reported in the uploaded file.

Author Response File: Author Response.pdf

Reviewer 2 Report

The review article describes status of graphene-Si based infrared photodetectors. It deals with internal photoemission theory in case of 2D materials and gives a brief theoretical background of the same. The article is well written. However, there are some concerns related to the work.

My major concerns are following:

1) In all the equations used, fonts are not visible. Please check the PDF version of the submitted manuscript. .It should be rectified.

2) The work related to grapehene/MoS2 heterostructure is out the context completely and does not make a sense, as per the background set for the review. Fig. 6 and related discussion should be removed. Also, Ref. 39 should be removed from Table 1. One can not compare graphene/MoS2 and graphene/Si structures here.

3) References should be cited in Figure captions as well.

Author Response

Reply is reported in the uploaded file.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

I consider that the authors have answered to all my suggestions. Now the manuscript is fine to publication.

Reviewer 2 Report

The authors have responded to previously raised concerns.

The manuscript can be accepted in its present form after doing minor language corrections.