Simplified perovskite solar cells (PSCs) were fabricated with the perovskite layer sandwiched and encapsulated between carbon-based electron transport layer (ETL) and counter electrode (CE) by a fully blade-coated process. A self-assembled monolayer of amphiphilic silane (AS) molecules on transparent conducting oxide (TCO) substrate appeals to the fullerene ETL deposition and preserves its integrity against the solvent damage. The AS serves as a “molecular glue” to strengthen the adhesion toughness at the TCO/ETL interface via robust chemical interaction and bonding, facilitating the interfacial charge extraction, increasing PCEs by 77 % and reducing hysteresis. A PCE of 18.64 % was achieved for the fully printed devices, one of the highest reported for carbon-based PSCs. AS-assisted interfacial linkage and carbon-material-assisted self-encapsulation enhance the stability of the PSCs, which did not experience performance degradation when stored at ambient conditions for over 3000 h.

中文翻译：

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界面连接和碳封装使全溶液打印钙钛矿光伏电池具有更长的使用寿命

简化的钙钛矿太阳能电池 (PSC) 是通过完全刮刀涂层工艺将钙钛矿层夹在并封装在碳基电子传输层 (ETL) 和对电极 (CE) 之间的。透明导电氧化物 (TCO) 基板上的自组装单层两亲性硅烷 (AS) 分子吸引富勒烯 ETL 沉积并保持其完整性免受溶剂损坏。AS 作为“分子胶”，通过强大的化学相互作用和键合增强 TCO/ETL 界面的粘附韧性，促进界面电荷提取，将 PCE 增加 77% 并减少滞后。全打印器件的 PCE 为 18.64%，是碳基 PSC 报告的最高值之​​一。