Promise of commercialization: Carbon materials for low-cost perovskite solar cells

Cai Yu^{1, 2}, Liang Lusheng², Gao Peng^{2, †}

(a), (c), (e) Top view and (b), (d), (f) cross-sectional SEM images of the carbon black, MWCNT, and graphite-based PVSCs. The dashed lines represent the interface of FTO/TiO₂ and CH₃NH₃PbI₃/C, respectively. Reprinted from Ref. [72].