The benzene excimer DFT-D type dispersion corrections increase the excimer binding (larger D e , smaller r e ) compared to the uncorrected functional (Figure ). Across all the tested TD-DHDFs, D3(BJ)-corrected methods tend to overestimate the benzene excimer binding energy, but overall reduce errors relative to the uncorrected functionals with absolute deviations in D e ranging from 0.01 to 7.87 kcal/mol (0.1 to 58% error) and absolute deviations in r e ranging from 0 to 0.10 Å (0-3%). The impact of dispersion correction varies between DHDHFs which can in some cases increase errors compared to the dispersion-uncorrected functional.