Low-Toxicity Perovskite Applications in Carbon Electrode Perovskite Solar Cells—A Review
Round 1
Reviewer 1 Report
I have carefully reviewed the review entitled: "Low toxicity perovskite applications in Carbon electrode Perovskite Solar Cells - A Review, by
Maria Bidikoudi, Carmen Simal and Elias Stathatos. This review is very interesting due to this gives a wide point of view about the use of lead free and modified materials with high stability, low cost and environmentally compatible, in order to increase the photovoltaic performance of solar cells, besides to contribute in the future commercialization. From my side, the review can be publishable in the actual form.
Author Response
We thank the reviewer for his positive response to our manuscript.
Reviewer 2 Report
The authors describe a review article entitled " Low toxicity perovskite applications in Carbon electrode Perovskite Solar Cells - A Review”. The topic of the manuscript is interesting, and the manuscript constitutes an interesting timely review concerning the use of perovkites in solar cells.
The work is well-written. Sufficient spectra and figures are included in the manuscript for comprehension and clarity. Convincing results are presented in this review. Overall, I think that this is a manuscript that I recommend for publication after inclusion of minor revisions.
1) In the introduction section, a table evidencing the advantages and disadvantages of the perovskite-technology compared to the previous technology (organic solar cells) should be added. Indeed, perovskites solar cells have been developed subsequent to extensive works done on organic solar cells.
2) At the beginning of the introduction section, the authors should also mention that perovskites have also been used for the design of supraconductors. This point is not mentioned.
3) From my viewpoint, a Jablonski diagram should be added. Indeed, for a reader who is not familiar to this topic, presence of the different layers should be more precisely detailed.
4) What about the device lifetime of perovskites solar cells. This point is not commented.
For all the above-mentioned reasons, at present, do not publish.
Author Response
Manuscript ID : electronics-1212998
Title: Low toxicity perovskite applications in Carbon electrode Perovskite Solar Cells - A Review.
Dear Editor,
We made all the suggested changes and additions which are listed in this letter and highlighted in manuscript. All the changes made in text have been highlighted in yellow color in the revised version of the manuscript. You may find a point-by-point response to the reviewers’ comments below. We thank both reviewers for their valuable comments
Reply to the Reviewers’ comments:
Reviewer #2: The authors describe a review article entitled "Low toxicity perovskite applications in Carbon electrode Perovskite Solar Cells - A Review”. The topic of the manuscript is interesting, and the manuscript constitutes an interesting timely review concerning the use of perovskites in solar cells.
The work is well-written. Sufficient spectra and figures are included in the manuscript for comprehension and clarity. Convincing results are presented in this review. Overall, I think that this is a manuscript that I recommend for publication after inclusion of minor revisions.
Reply: we thank the reviewer for his/her positive opinion about our manuscript
Comment 1: In the introduction section, a table evidencing the advantages and disadvantages of the perovskite-technology compared to the previous technology (organic solar cells) should be added. Indeed, perovskites solar cells have been developed subsequent to extensive works done on organic solar cells.
Reply: In this manuscript we present the recent developments and challenges in the field of perovskite solar cells, focusing on the C-based device structure. The scope of this review is to highlight the most promising directions towards Pb-free perovskites in this particular structure. In fact, the device structure that we focus on, carbon electrode based PSCs, is considered to be more of an evolution of Dye Sensitized Solar Cells (DSSCs) and Quantum Dot Sensitized Solar Cells (QDSSCs) rather than organic solar cells, owing to their p-i-n structure and mesoporous nature. Therefore, we believe that a comparative table with the advantages and disadvantages of PSCs compared to OPVs would be out of the scope of our study.
Comment 2: At the beginning of the introduction section, the authors should also mention that perovskites have also been used for the design of supraconductors. This point is not mentioned.
Reply: A reference on perovskite superconductors has been added in the Introduction Section, in paragraph 1, page 1.
Comment 3: From my viewpoint, a Jablonski diagram should be added. Indeed, for a reader who is not familiar to this topic, presence of the different layers should be more precisely detailed.
Reply: A Jablonski diagram mainly illustrates the phosphorescence and fluorescence in molecular spectroscopy and demonstrates the excited states of a molecule along with the radiative and non-radiative transitions that can occur between them. It is very important in any photoluminescence spectroscopy measurement and is typical in light emitting devices. However, a similar but more insightful diagram that is mostly used in PSCs is the Energy Level diagram, which has been drawn and added in Figure 6 at page 10.
Comment 4: What about the device lifetime of perovskites solar cells. This point is not commented.
Reply: In order to increase the lifetime of PSCs, there has been a turn towards C based devices, which are characterized by enhanced stability and have proven to be stable for more than 1 year (as also mentioned in the manuscript in Paragraph 4 of the Introduction Section). We believe that detailed comments on the PSCs lifetime would be out of the scope of this manuscript, which focuses on the incorporation of Pb-free perovskites in C electrode PSCs.
Author Response File: 
Author Response.pdf
