Iodine-terminated self-assembled monolayer (I-SAM) was used in perovskite solar cells (PSCs) to achieve a 50% increase of adhesion toughness at the interface between the electron transport layer (ETL) and the halide perovskite thin film to enhance mechanical reliability. Treatment with I-SAM also increased the power conversion efficiency from 20.2% to 21.4%, reduced hysteresis, and improved operational stability with a projected T80 (time to 80% initial efficiency retained) increasing from ~700 hours to 4000 hours under 1-sun illumination and with continuous maximum power point tracking. Operational stability–tested PSC without SAMs revealed extensive irreversible morphological degradation at the ETL/perovskite interface, including voids formation and delamination, whereas PSCs with I-SAM exhibited minimal damage accumulation. This difference was attributed to a combination of a decrease in hydroxyl groups at the interface and the higher interfacial toughness.

碘末端自组装单分子层（I-SAM）用于钙钛矿太阳能电池（PSC）中，以使电子传输层（ETL）与卤化物钙钛矿薄膜之间的界面处的粘合韧性提高50％，从而提高机械强度可靠性。使用I-SAM的处理还将功率转换效率从20.2％提高到21.4％，减少了磁滞现象，并提高了运行稳定性，预计T80（保留的初始效率将达到80％的初始效率）在1-sun下会从约700小时增加到4000小时。照明和连续最大功率点跟踪。经操作稳定性测试的不含SAM的PSC在ETL /钙钛矿界面处出现了不可逆的广泛形变，包括空隙形成和分层，而带有I-SAM的PSC的损伤累积最小。