Moreover, tetrapod (TP) nanocrystals with
the advantage over NRs (which tend to align horizontally21)
to have one arm always extended towards the cathode were
successfully utilized too.4,6,10,11 In direct comparisons solar cell
efficiencies proved to be higher for devices incorporating NRs
instead of QDs,10,20 and TPs were demonstrated to perform
better than NRs.4,10

IMO QTMM is way ahead of this in the % efficiency

Another piece of the puzzle we are all waiting to learn about!