I have recently started working on Double Perovskites Quantum Dots and one of the main issue with them is that they are not much stable. Some papers did talk about how much stable there compounds are but there is not much quantitative comparison I could find. So before going into the depth of optical and electronic properties I thought I should do a comparison between stability for different types of Quantum Dots (the ones I think which show a lot of promise: $\ce{Cs2AgMX6}$, M = Sb,In,Bi). However I am a bit confused how do I approach this.
Some literature I found online uses convex hull method to find possible stable structures, but how do I implement this. And I think doing a comparison of Goldschmidt's tolerance factor along with cation/anion radius ratio might also help.
Please guide me what possible approach would be suitable for this type of comparison.