Efficient Two‑Dimensional Perovskite Solar Cells Realized by Incorporation of Ti_(3)C_(2)T_(x) MXene as Nano‑Dopants

作     者：Xin Jin Lin Yang Xiao‑Feng Wang Xin Jin;Lin Yang;Xiao-Feng Wang

作者机构：Key Laboratory of Physics and Technology for Advanced Batteries(Ministry of Education)College of PhysicsJilin UniversityChangchun 130012People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2021年第13卷第4期

页      面：234-246页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(No.11974129 to X.-F.W.) “the Fundamental Research Funds for the Central Universities,Jilin University.” 

主　　题：2D perovskite solar cells Ti_(3)C_(2)T_(x)nanosheets Trap densities Vertical orientation Charge transport 

摘      要：Two-dimensional(2D)perovskites solar cells(PSCs)have attracted considerable attention owing to their excellent stability against humidity;however,some imperfectness of 2D perovskites,such as poor crystallinity,disordered orientation,and inferior charge transport still limit the power conversion efficiency(PCE)of 2D *** this work,2D Ti3C2Tx MXene nanosheets with high electrical conductivity and mobility were employed as a nanosized additive to prepare 2D Ruddlesden–Popper perovskite *** PCE of solar cells was increased from 13.69(without additive)to 15.71%after incorporating the Ti_(3)C_(2)T_(x) nanosheets with an optimized *** improved performance is attributed to the enhanced crystallinity,orientation,and passivated trap states in the 3D phase that result in accelerated charge transfer process in vertical *** importantly,the unencapsulated cells exhibited excellent stability under ambient conditions with 55±5%relative humidity.