Assertion: solar cell's layer | /r/HasProperty | required
Facets:
Source sentences:
text: Typically, to upgrade an n-PERT solar cell to a n-TOPCON solar cell, only an additional ultra thin SiO 2 layer and a doped poly-Si layer are required.
text: As compared to the other organic dyes, standard Ru complexes have significantly lower absorption coefficient and thus a thick layer of TiO 2 was required, which results in the higher electron recombination probability.