# Modeling of photocatalytic and photoelectric devices on a macroscopic device level [closed]

As a computational materials chemist studying photocatalysis, how close to realistic systems can your modeling get?

I have a sort of high-level question about the theoretical modeling of photocatalysis. Most of the computational work on photocatalysis involves DFT calculations looking at band gaps, free energy profiles, and reaction pathways. I have also seen a handful of papers that use reactive MD to probe how the surrounding water molecules get affected by adsorbed species.

As a computational chemist or materials engineer, and you want to take your work closer to a real system, what is the logical next step? Would it be device modeling, where you take inputs from DFT (such as overpotentials), and then try to calculate the I-V curves, for instance? Are there any other multi-scale modeling techniques or coarse-grain methods that can be used?

I guess this question can be extended more generally to different classes of applications, such as $\ce{CO2}$ sensors, other electrochemical reactions, and so on. I'm not really sure what the next step would be to go beyond DFT in order to model more macroscopic length and time scales.

## closed as too broad by bon, Todd Minehardt, Loong♦, Geoff Hutchison, M.A.R.Sep 18 '15 at 20:48

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

• At first sight the question appears overly broad for me. – Wildcat Aug 2 '15 at 18:37
• @Wildcat: I understand, but I'm not really sure about how to make it more specific. I have edited my question a bit though. – user34801 Aug 2 '15 at 20:05