The polymer solar cell is able to retain 97% of its performance after 2,000 hours in air. By blending small-molecule acceptors into polymeric matrices, the research team improved molecular packing, enhancing both stability and charge transport for "ultra-stable" flexible devices.
Solar cell price is now virtually irrelevant because the majority of cost is installation.
For example on a $10k install, if you bought the solar panels yourself you’d pay $2k for the panels.
So even if solar panels were free, it would only save 20%.
Cheaper inverters and batteries would be the real game changers at this point. At least for DIY home solar.