DSSC is a proven alternative to solar PV for generating electricity. While the efficiency of DSSC is lower per unit area, it is light and can be applied on large surfaces including vertical walls. Thus its low efficacy is offset by total electrical output.
The idea is to generate electricity from solar energy on surfaces where PV installation is infeasible. Moreover the base dye can be synthesized in different colors making it attractive when installed on exterior walls.
This is essentially an effort to maximize harnessible solar energy in residential homes.