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

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

(color online) (a)–(c) Development of a candle soot/perovskite clamping solar cell. Reprinted from Ref. [62]. (d) Fabrication process flow for the instant inkjet printing of the C/CH₃NH₃PbI₃ planar perovskite solar cells. For comparison, a different strategy was used to convert PbI₂ into CH₃NH₃PbI₃ using separate step 3 and step 4. Reprinted from Ref. [19].