It is very well known that, owing to the soft lattice, and ionic bonds, metal halide perovskites shows easy movements of different ionic species under external perturbation. Due to this the materials shows mixed electro ionic conduction.
My question is that, is there any experimental method that can distinguish between the ionic and electronic component of the total conductance?
How one can separately measure these two (electronic and ionic) conductance?
Hey there Subham Paramanik!
You've Subham Paramanik hit on a crucial point about metal halide perovskites. Their soft lattice and ionic bonds indeed contribute to mixed electro-ionic conduction, making it essential to distinguish between electronic and ionic components.
Fortunately, several experimental methods can help in this regard. One common approach involves impedance spectroscopy, where frequency-dependent measurements can reveal distinct responses from electronic and ionic processes. By analyzing the impedance spectra at different frequencies, one can separate out the contributions of electronic and ionic conductance.
Another method is to employ temperature-dependent conductivity measurements. Since electronic and ionic conductivities often have different activation energies, varying the temperature can selectively enhance one type of conductivity while suppressing the other. This allows for the determination of their individual contributions to the total conductance.
Additionally, techniques such as Hall effect measurements and transient current analyses can provide valuable insights into the nature of charge transport, aiding in the separation of electronic and ionic conductivities.
By combining these experimental methods judiciously, researchers can effectively disentangle the electronic and ionic contributions to the overall conductivity in metal halide perovskites, paving the way for a deeper understanding of their fascinating properties.
Hope this helps! If you Subham Paramanik need more details or have further questions, feel free to ask. Let's dive deeper into this fascinating topic!
Thank you so much Kaushik Shandilya . This is an underexplored topic of metal halide perovskites. Could you pleas suggest me some helpful articles covering such studies?
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