Investigation on Preparation and Performance of High Ga CIGS Absorbers and Their Solar Cells

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Please refer attachment.

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

This review report has been removed from the review record as it did not meet MDPI’s review report standards (https://www.mdpi.com/reviewers#_bookmark11).

Author Response

NA

Reviewer 3 Report

Comments and Suggestions for Authors

This review report has been removed from the review record as it did not meet MDPI’s review report standards (https://www.mdpi.com/reviewers#_bookmark11).

Author Response

N/A

Reviewer 4 Report

Comments and Suggestions for Authors

The manuscript “Investigation on Preparation and Performance of High Ga CIGS Absorbers and Their Solar Cells” investigates the preparation and performance of high Ga content CIGS absorbers for use in tandem solar cells. The research focuses on how varying the Ga/(In+Ga) ratio affects the band gap and efficiency of CIGS solar cells, ultimately reaching a high efficiency of 11.58% for a ratio of 0.72.

The methodology for preparing CuInGa precursors and CIGS absorbers is comprehensively detailed and offers a thorough examination of the influence of varying Ga content on the physical properties and performance of CIGS solar cells.

The utilization of multiple characterization techniques, including ICP-OES, SEM, XRD, PL, and EQE, enhances the dependability of the findings. Additionally, extensive research has been conducted to identify the optimal Ga/(In+Ga) ratio for achieving maximum solar cell efficiency.

Nevertheless, the authors should address a few caveats before consideration for acceptance. For instance,

 

1) The introduction should be more concise and focused on the specific research gap that the study addresses. In summary, the authors need to clarify the significance of the research problem.

2) Figure 1 would be enhanced by using higher resolution images or larger images, which would more effectively showcase the distinct morphological characteristics.

3) Typographical errors are minimal but should be corrected (e.g., "the planeness of the surface" should be "the flatness of the surface") line 126.

4) How stable are these high Ga content CIGS solar cells? The manuscript could benefit from a discussion on the long-term stability of the CIGS solar cells.

5) The researchers should compare these findings with similar studies in relevant literature.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

Comments and Suggestions for Authors

Please, accept this article in present form.

Author Response

NA

Reviewer 4 Report

Comments and Suggestions for Authors

The authors have addressed my concerns, and I have no further issues to raise at this time.