IMPORTANCE OF SELECTIVE CONTACTS IN HIGH OPEN CIRCUIT VOLTAGE FAPbBr3 PEROVSKITE SOLAR CELLS

2/20/2018

Sumanshu Agarwal, Siksha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar, E-mail: sumanshuagarwal@soa.ac.in

Dr. Ambrish

2/20/2018 05:19:47 am

Dear Dr. Sumanshu,
You have nicely presented your research. I have just a few queries.
1. Can Main group metals also form Perovskite, like LiNaBr3 or something like that?
2. Is there any special requirement for an anion to form Perovskite, like high electronegativity or electron affinity?

Thanks.

Sumanshu Agarwal

2/20/2018 09:21:39 pm

Dear Dr. Ambrish,
Thank you for the appreciation.

To answer your first query, I would like to say that many researchers have exhibited perovskite compound that consist of main group metals e.g. CsSnX3. (X=halide)

Now, if the composition of 3 ions (A, B, and X) in a compound is ABX3 where A and B are cations and X is anion, then the compound may exhibit the perovskite structure when different ionic radii are in such a way that 0.8<= goldsmith tolerance factor (t=(rA+rX)/sqrt(2(rB+rX))) <=1. I am not sure about the exact range of the relative electronegativity/electron affinity of the anion required to form perovskite (if there is any). But, so far I have only heard of the perovskite that have halide(s) or oxide as anion. I hope that should resolve the concern to some extent.

Thanks.

Dr. Ambrish

2/20/2018 09:56:31 pm

Thanks Dr. Sumanshu for your explanation.

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