Review Reports

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

In this manuscript, authors adopt the strategy of doping IVA group elements C, Si, Sn and Pb in the a-Ge2Se3 gate materials of phototransistors to explore the effects of the changes of Ge-Se and Ge-Ge bonds on threshold voltage, photoresponse and photocurrent.，This work can be considered for publication after the following issues.

1.         Alternately stacked gate materials are shown in the fabrication process in figure 2. The effect of multi-layer alternating stacking on devices is not discussed in this paper. Why?

2.         Use the transmission electron microscope to characterize the gate material layer to verify the presence of multiple layers in the device.

3.         In your introduction and discussion, there is insufficient explanation about phototransistors. It is recommended to quote the following relevant documents (DOI: 10.1039/d2tc04340h, DOI:10.1002/adfm.202113053, DOI:10.1109/TED.2020.3001492, DOI:10.1007/s42765-023-00318-z, DOI:10.1002/aelm.201901255) to provide more background support for your research, which will help readers better understand your research contribution and background.

4.         The typesetting of the table in figure 9 is very poor, the information in the figure cannot be clearly seen, and the content of figure 9 is not described much in the article, so it is recommended to put the content of figure 9 in the supporting information of the article.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Comments and Suggestions for Authors

Please see that attached PDF

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The authors have answered all the questions and made the relative revisions.

Comments on the Quality of English Language

The English can be refined.

Reviewer 2 Report

Comments and Suggestions for Authors

I very much appreciate authors efforts in performing complementary experiments to reinforce the conclusions made in the original version. The added text further clarifies the takeaway message. 

I am happy to encourage publication of this study.