Ti3C2 MXene Nanosheets–Modified TiO2 Electron‐Transport Layers Enables Efficient Solar Cells with Outstanding Device Consistency

• DOI: 10.1002/solr.202300153
• Publication Date: 2023-05-04T12:46:47Z
• Authors: Yingguo Yang; Kaili Wang; Yingchun Niu; Meng Li; Quan Xu; Jiaou Wang; Xiao-Xi Li; Ying Wang; Chuan-Fan Ding; Huanxin Ju; Lifeng Yang; Shanglei Feng; Lina Li
• Keywords: Perovskite solar cell

The electron‐transport layer (ETL) of n–i–p‐structured perovskite solar cells (PSCs) plays vital important roles determining their photovoltaic performance. It is known that the ETL lying underneath can affect crystallization process upper layer. Furthermore, buried interface between and usually place where severe non‐radiative recombination happens. Herein, MXene (Ti 3 C 2 )‐modified TiO (TiO :MXene) demonstrated as an excellent for high‐performance PSCs. FAPbI ‐based MAPbI with :MXene achieved a power conversion efficiency (PCE) up to 24.63% 20.1%, respectively. Importantly, target cell shows superior stability device consistency. devices keep ≈98% initial PCE after 7 weeks stored in ambient environment 40%–60% relative humidity at 25 °C, whereas reference declined ≈90% its value under same test conditions. found film on has crystallinity structural uniformity. For first time, grazing‐incidence small‐angle X‐ray scattering technique employed probe information complete PSC large scale, providing new possibilities characterizing large‐size modules.