Emerging New-Generation Semiconductor Single Crystals of Metal Halide Perovskites for Radiation Detection

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

1. The authors should consider providing a more explicit comparison of the different perovskite materials (organic-inorganic, lead-free, etc.) in terms of their strengths and limitations for X-ray and γ-ray detection. While individual studies are mentioned, it would be helpful to summarize the key performance metrics of these materials (e.g., mobility-lifetime product, trap density, sensitivity) in a table or figure for easier comparison.
2. The discussion of material stability, especially regarding phase transitions and ion migration, is crucial but could be expanded. The manuscript acknowledges that FAPbI₃ experiences phase transitions and that MAPbI₃ suffers from ion migration issues, which limit long-term stability. It would be beneficial to discuss potential solutions or ongoing research efforts aimed at overcoming these challenges, as this is key to practical applications.
3. The authors highlight efforts to reduce ion migration through deuteration and asymmetric contacts, which is an interesting approach. However, the discussion on the underlying mechanisms behind ion migration suppression could be elaborated further. A more detailed explanation of how deuteration influences ion migration and resistivity would enhance the reader's understanding.

4.    The manuscript could benefit from a brief discussion of how the advancements in perovskite single crystals compare to other existing materials used in X-ray and γ-ray detection, particularly from a commercial perspective. This would provide a broader context for the reader and highlight the significance of the research findings.

5.    The manuscript provides numerous performance metrics, including light yield, photoluminescence quantum yield (PLQY), and decay times. However, it would enhance clarity to organize these metrics in a comparative table that summarizes key values for each scintillator discussed. This would help readers quickly grasp the relative advantages and disadvantages of the materials presented.

6.    While the section mentions traditional scintillator materials (e.g., CsI, NaI, BGO, LYSO), it could benefit from a more detailed comparison in terms of specific applications, advantages, and limitations. Highlighting where perovskite scintillators, particularly Cs₃Cu₂I₅, may outperform these traditional materials would strengthen the manuscript's argument for their practical applicability.

7.    The discussion on ion doping and its effect on scintillation properties is intriguing but could be expanded. A more thorough explanation of how trace doping of heterovalent magnetic ions modulates the emission dynamics of self-trapped excitons would add depth to the analysis. Consider providing a schematic or diagram to illustrate these mechanisms.

8.    While the manuscript emphasizes the potential of Cs₃Cu₂I₅ for practical applications, it would be beneficial to address any existing challenges or limitations that might hinder its widespread use. For instance, discussing the scalability of the synthesis methods, long-term stability, or potential environmental concerns associated with the materials could provide a more balanced perspective.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

This manuscript, "Emerging New-Generation Semiconductor Single Crystals of Metal Halide Perovskites for Radiation Detection” summarizes recent advancements in metal halide perovskite-based radiation detection technology. However, prior to the publication, I would like to make a suggestion for clarity. Please refer below.

 

1. Please modify the reference abbreviation correctly.

2. Some typos are detected, such as upper-lettering, double spacing, non-stoichiometry expression, and non-spacing between words. Please carefully check the entire manuscript for formatting.

3. From the processing and engineering aspect, I suggest making an independent section for the synthesis/fabrication process of perovskite single crystals.

4. Please add a new section for the principle of detection of radiation detection for the reader.

5. If there are some standards for the device, please make a comment.

Comments on the Quality of English Language

The quality of English could be improved. But, not too bad in the current status. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf