Promise of commercialization: Carbon materials for low-cost perovskite solar cells
Cai Yu1, 2, Liang Lusheng2, Gao Peng2, †
       

(color online) (a) Schematic diagram of a semitransparent perovskite solar cell. Reprinted from Ref. [111]. (b) Simplified sketch of a four-terminal tandem solar cell consisting of a graphene-based perovskite top solar cell and an amorphous/crystalline silicon bottom solar cell. Reprinted from Ref. [112]. Solar cell performance using SG and MG for hole extraction. Cross-section view of (c) SG and (d) MG based PVSC (scale bar: ). Reprinted from Ref. [76].