Barrier‐Free Cathode Contacts for High‐Efficiency Inverted Carbon‐Perovskite Solar Cells

Engineering notes

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Chinese explanation / 中文解读

中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。

Original abstract

ABSTRACT Compared to vacuum‐deposited electrodes of metal or metal oxides, printable carbon electrodes (CEs) offer a more sustainable approach toward commercialization of perovskite solar cells (PSCs). Significant attention has been paid to the N‐i‐P carbon‐based PSCs (C‐PSCs), owing to the favorable alignment of CEs work‐functions with perovskite valence band. In contrast, the P‐i‐N structured PSCs employing carbon as electron‐collecting contact has been rarely explored, primarily due to the presence of large interfacial barrier. Here, we eliminate the stubborn interfacial barriers by means of increasing free carrier density of electron transport layer (ETL) in conjugation with the insertion of a non‐conducting metal thin layer between ETL and CEs. The synergistic strategies enable the preparation of efficient P‐i‐N C‐PSCs with a record efficiency of 22.79% (certified 21.34%). The detailed life cycle cost and assessment reveal that our P‐i‐N C‐PSCs outperform metal‐electrode counterparts in both cost‐effectiveness and environmental impact.

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